Pan American Energy LLC, Argentine Branch



 Translation from the original prepared in Spanish for publication in Argentina

PAN AMERICAN ENERGY LLC

(ARGENTINE BRANCH)

FINANCIAL STATEMENTS AS OF MARCH 31, 2008
AND COMPARATIVE INFORMATION

CONTENTS

Limited review report on interim financial statements

Legal information

Balance sheet

Statement of income

Statement of cash flows

Notes to the financial statements

Exhibits A, B, C, D, E, F, G, H and I 20

Reporting summary

Supplementary information required by the Buenos Aires Stock Exchange 39


REVIEW REPORT ON INTERIM FINANCIAL STATEMENTS

To the Legal Representative of

Pan American Energy LLC (Argentine Branch)

Av. Leandro N. Alem 1180 - 11th Floor

Buenos Aires, Argentina

We reviewed the accompanying balance sheet of Pan American Energy LLC (Argentine
Branch) as of March 31, 2008, and the related statements of income and cash
flows, notes 1 to 15 and exhibits A, B, C, D, E, F, G, H and I for the
three-month period then ended, comparative with the same period of the prior
year, and in the case of the balance sheet and the related notes and exhibits,
with the financial statements as of December 31, 2007. The preparation of these
financial statements is the responsibility of the Legal Representative of the
Branch.

We conducted our review in accordance with auditing standards generally accepted
in the Republic of Argentina applicable to the limited scope review of interim
financial statements. A review of interim financial information consists
principally in applying analytical procedures to the accounting data and making
inquiries of the individuals responsible for its preparation. As a review is
substantially less in scope than an audit of annual financial statements, we do
not express an opinion on the financial position of the Branch as of March 31,
2008, nor on the results of its operations and the cash flows for the
three-month period then ended.

The accompanying consolidated financial statements were translated into the
English language from those issued in Spanish in conformity with accounting
principles and reporting practices adopted by the regulations of the National
Securities Commission ("CNV") of Argentina.

In relation to the financial statements as of December 31, 2007, presented for
comparative purposes, we issued an unqualified opinion on March 7, 2008. In
addition, on May 10, 2007, we issued an unmodified review report on the
financial statements for the three months ended March 31, 2007, also presented
for comparative purposes.

Based on our review, we report that the financial statements as of March 31,
2008 and for the three months then ended referred to in the first paragraph
consider all the significant facts and circumstances of which we became aware
during our review and in relation to them we have no significant observations.

In compliance with rules and regulations in force, we report that:

a) the financial statements comply with the provisions of the Corporations Law
and the regulations on accounting documentation of the National Securities
Commission, they are transcribed in the Inventory Book and they derive from the
accounting records of the Branch maintained in the Republic of Argentina timely
authorized by the Inspection Board of Legal Entities (IGJ). Following its
submission of the special report required by section 287 of Resolution 7/2005 of
the IGJ, the Branch has not received the certification from such authorities
acknowledging compliance. The information systems used to process the financial
information included in the financial statements are maintained under the
security and integrity conditions based on which they were authorized;

b) we read the reporting summary (sections "Balance sheet items", "Income
statement items", "Statistical data" and "Ratios") and the supplementary
information to the financial statements required by section 68 of the
regulations of the Buenos Aires Stock Exchange and, based on our review as far
as it relates to our area of responsibility, we have no observations, and

c) as of March 31, 2008, the accrued liability for pension contributions arising
from the accounting records amounted to $ 3,946,816, no amounts being due as of
that date.

Buenos Aires, May 9, 2008
                SIBILLE


          Graciela C. Laso
              Partner

FINANCIAL STATEMENTS as of March 31, 2008 for the three-month period beginning
January 1, 2008 and ended March 31, 2008 and comparative information

Stated in pesos

Legal address of the Branch: Av. Leandro N. Alem 1180 - 11th floor - Buenos
Aires

Main activity of the Branch: Oil and gas exploration and production

Date of registration with the Public Registry of Commerce: October 17, 1997

Registration number with the Inspection Board of Legal Entities: 1868, Book 54,
Volume B of Foreign Companies

Capital registered with the Inspection Board of Legal Entities: $ 200,000,000
under number 1257, Book 57, Volume B of Foreign Companies, and $ 21,779,007
under number 2106, Book 58, Volume B of Foreign Companies (Note 8)

Date of registration of capital with the Inspection Board of Legal Entities:
$ 200,000,000 on July 11, 2003 and $ 21,779,007 on December 12, 2005

Subscribed capital (paid in full): $ 221,779,007

HEAD OFFICE

Name: Pan American Energy LLC

Legal address: The Corporation Trust Company, Trust Corporation Center, 1209
Orange Street, Wilmington, Delaware - 19801 - United States of America

Main activity: Oil and gas exploration and production


PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

BALANCE SHEET as of March 31, 2008 and as of December 31, 2007 (in pesos)

                                                                       03/31/2008         12/31/2007
                                                               ------------------ ------------------
ASSETS
CURRENT ASSETS

Cash on hand and in banks (Note 4 a)                                   32,090,884         33,987,608
Investments (Exhibit C)                                               604,362,551        451,093,477
Accounts receivable (Note 4 b)                                        900,802,554        497,884,676
Other receivables (Note 4 c)                                           97,394,437         88,459,852
Inventories (Note 4 d)                                                243,403,513        189,479,197
                                                               ------------------ ------------------

Total current assets                                                1,878,053,939      1,260,904,810
                                                               ------------------ ------------------

NON CURRENT ASSETS

Other receivables (Note 4 e)                                           53,319,572         53,139,229
Investments (Exhibit C)                                                 8,750,088          9,533,846
Property, plant and equipment (Exhibit A)                           7,810,773,395      7,383,251,413
Intangible assets (Exhibit B)                                             379,713            390,469
                                                               ------------------ ------------------

Total non current assets                                            7,873,222,768      7,446,314,957
                                                               ------------------ ------------------

Total assets                                                        9,751,276,707      8,707,219,767
                                                               ================== ==================

LIABILITIES

CURRENT LIABILITIES

Accounts payable (Note 4 f)                                           745,382,012        645,049,836
Loans (Note 4 g)                                                      908,809,960        745,307,677
Payroll and social security contributions                              26,390,669         42,426,954
Taxes payable (Note 4 h)                                              272,941,356        271,153,439
Provision for future compensation to personnel
(Exhibit D)                                                             2,476,055          2,461,743
                                                               ------------------ ------------------

Total current liabilities                                           1,956,000,052      1,706,399,649
                                                               ------------------ ------------------

NON CURRENT LIABILITIES

Accounts payable (Note 4 i)                                            49,167,122         49,129,413
Loans (Note 4 j)                                                    3,377,008,800      2,984,559,219
Other liabilities (Note 3.2.j)                                        135,119,531        128,930,896
Deferred tax (Notes 3.2.h and 11)                                     394,874,576        389,697,321
Provision for future compensation to personnel
(Exhibit D)                                                            15,896,735         15,241,426
Provision for environmental remediation (Exhibit D)                    82,650,048         82,182,464
Accruals (Exhibit D)                                                   20,966,145         20,217,498
                                                               ------------------ ------------------

Total non current liabilities                                       4,075,682,957      3,669,958,237
                                                               ------------------ ------------------

Total liabilities                                                   6,031,683,009      5,376,357,886

Account with Head Office (Note 7)                                   3,258,354,691      2,869,622,874
Capital allocated to the Branch (Note 8)                              221,779,007        221,779,007
Capital adjustment                                                    239,460,000        239,460,000
                                                               ------------------ ------------------

Total                                                               9,751,276,707      8,707,219,767
                                                               ================== ==================

The accompanying notes and exhibits are an integral part of these financial
statements.

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

STATEMENT OF INCOME for the three-month period beginning January and ended
December 31, 2008 comparative with the prior year (in pesos)

                                                      2008                         2007
                                                (three months)               (three months)
                                         ---------------------------- ----------------------------

Sales                                                   1,468,875,654                1,357,688,556
Cost of sales (Exhibit E)                              ( 702,878,558)               ( 675,501,854)
                                                      ---------------               --------------

Gross profit                                              765,997,096                  682,186,702

Administrative expenses (Exhibit G)                     ( 64,856,042)                ( 56,002,910)
                                                      ---------------               --------------

Operating income                                          701,141,054                  626,183,792

Financial results
 Generated by assets
  Interest                                  3,741,150                     9,020,029
  Exchange gains/losses                     5,159,254                    13,784,807
    Other financial results                    18,357       8,918,761       911,972     23,716,808
                                         ------------                 -------------

 Generated by liabilities
  Interest                               (69,389,703)                  (63,875,109)
  Exchange gains/losses                  (24,559,810)                  (32,079,825)
    Other financial results              ( 7,786,549)  ( 101,736,062)  ( 6,072,501) ( 102,027,435)
                                         ------------                 -------------

Other income and expenses - net                          ( 2,065,569)                 ( 1,977,433)
                                                      ---------------               --------------

Income before income tax                                  606,258,184                  545,895,732

Income tax expense - current (Note 3.2 h
 and 11)                                               ( 212,349,112)               ( 204,821,539)

Income tax (expense) benefit - deferred
(Note 3.2.h and 11)                                      ( 5,177,255)                   18,218,711
                                                      ---------------               --------------

Net income (Note 7)                                       388,731,817                  359,292,904
                                                      ===============               ==============

The accompanying notes and exhibits are an integral part of these financial
statements.

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

STATEMENT OF CASH FLOWS for the three-month period beginning January 1 and ended
March 31, 2008 comparative with the same period of the prior year (in pesos)

                                                                         2008           2007
                                                                     ------------- --------------
                                                                      (3 months)     (3 months)
Cash provided by operations:

  Net income                                                           388,731,817    359,292,904

  Adjustment to reconcile net income with the cash provided by
   operations
  Depreciation of Property, Plant and Equipment                        191,083,279    200,991,260
  Amortization of intangible assets                                         10,756        405,814
  Income tax expense                                                   212,349,112    204,821,539
  Net increase in allowances for bad debtors,
    lawsuits and obsolescence of materials                               1,059,042        888,820
  Gain (loss) on property, plant and equipment                          ( 216,993)         23,864
  Increase in provision for future compensation to personnel             1,246,407        740,000
  Net increase in the provision for environmental remediation              218,799   ( 1,394,865)
  Other non-cash items (1)                                              91,033,755     54,348,401

     Changes in assets, liabilities and account with Head Office:
                                                                     (402,917,878)     62,555,598
  (Increase) decrease in accounts receivable                         ( 53,924,316)     71,429,672
  (Increase) decrease in inventories                                  ( 8,934,585)     26,947,829
  (Increase) decrease in other current receivables                      ( 180,343)     ( 719,819)
  Increase in other non current receivables                            102,645,596  (152,156,727)
      (Increase) decrease in accounts payable, payroll and social
       security contributions,
taxes payable and other liabilities                                     ( 576,786)     ( 504,506)
  Compensation paid to personnel for benefit plans                      ( 310,395)              -
  Payments related to lawsuits                                       (222,684,556)  (157,763,032)
                                                                     ------------- --------------
  Income tax paid                                                      298,632,711    669,906,752
                                                                     ============= ==============
Net cash provided by operations

Cash used in investing activities:
  Decrease (increase) in long-term investments                             783,758   ( 5,759,900)
  Acquisition of property, plant and equipment                       (618,369,625)  (454,668,020)
  Additions of intangible assets                                                 -      ( 46,773)
  Collection due to the sale of property, plant and equipment              230,142          7,780
                                                                     ------------- --------------
Cash used in investing activities                                    (617,355,725)  (460,466,913)
                                                                     ------------- --------------

Cash provided by (used in) financing activities:
  Increase in loans (net)                                              470,095,364    230,287,065
  Net activity with Head Office                                                  -  ( 21,582,772)
                                                                     ------------- --------------
Cash provided by (used in) financing activities                        470,095,364    208,704,293
                                                                     ------------- --------------

Net increase in cash                                                   151,372,350    418,144,132

Cash at beginning of period (2)                                        485,081,085    249,407,237
                                                                     ------------- --------------

Cash at the end of the period (2)                                      636,453,435    667,551,369
                                                                     ============= ==============

(1) It is made up of:

Exchange gains/losses and other financial results
relating to loans and other                                                85,856,500                         72,567,112
Deferred income tax benefit                                                 5,177,255                      ( 18,218,711)
Total                                                                      91,033,755                         54,348,401

(2) Cash and banks plus investments becoming due in a period not exceeding three
months.

The accompanying notes and exhibits are an integral part of these financial
statements.

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

NOTES TO THE FINANCIAL STATEMENTS as of March 31, 2008 and comparative
information (in pesos)

NOTE 1 - THE BRANCH

Pan American Energy LLC (Argentine Branch) is engaged in the exploration,
development and production of hydrocarbons.

On October 30, 1997, a definitive agreement for the transfer of assets and
liabilities was entered into between Amoco Argentina Oil Company (Argentine
Branch) and Pan American Energy LLC (Argentine Branch) hereinafter "the Branch",
whereby Amoco Argentina Oil Company (Argentine Branch) transferred its business
consisting of assets and liabilities to the Branch, effective on October 8,
1997.

On May 1, 1998 a definitive agreement for the transfer of assets and liabilities
was entered into between Pan American Continental S.R.L. and the Branch, whereby
Pan American Continental S.R.L. transferred to the Branch its business
consisting of the assets and liabilities except for the name Pan American
Continental.

NOTE 2 - OPERATIONS OF THE BRANCH

The following table summarizes the main operations, blocks and joint ventures in
which the Branch is or was involved during the three-month period ended March
31, 2008.

Activity                                    operations             interest        participation
------------------------------------------- -------------------------------------- ------------------

Oil and gas production and development      Cerro Drag�n                           100.00%            Operator
                                            Piedra Clavada                         100.00%            Operator
                                            Koluel Kaike                           100.00%            Operator
                                            Lindero Atravesado                     62.50%             Operator
                                            Anticlinal Funes 80.00%                Operator
                                            Acambuco                                                  Operator Aguada
                                                                                                       Pichana 18.18%
                                                                                   52.00%              Non operator
                                            San Roque                              16.47%             Non operator
                                            Estancia La Escondida (1)              25.00%             Non operator

Oil and gas exploration and development     Acambuco "B"                           100.00%            Operator
                                            Bandurria                              18.18%             Non operator
                                            Costa Afuera Argentina "CAA-40"        50.00%             Non operator
                                            Costa Afuera Argentina "CAA-46"        50.,00%            Non operator
                                            Centro Golfo San Jorge Marina Chubut   90.00%             Operator

Explanations:

(1) The Joint Venture agreement (UTE) governing the relationships between the
holders of concession states that their participating interests in rights,
obligations and interests inherent in the property including production, will be
distributed based on the depth from which production is obtained: in the deep
area, the Branch has a 75% interest and the co-holder has the remaining 25%; in
the shallow area from which current total production is obtained, the Branch has
a 25% interest and the co-holder the remaining 75%; and in the area
"Descubrimiento El Zanj�n", both parties hold a 50% interest. The average
interest described grants the Branch a 50% interest in the rights over the
property, regardless the percentage thereof in the concession.

NOTE 3 - ACCOUNTING PRINCIPLES

3.1 Reporting currency

In accordance with Decree 664/2003 and General Resolution No. 441/2003 of the
National Securities Commission ("Comisi�n Nacional de Valores" or CNV), the
Branch discontinued the application of inflation accounting as from March 1,
2003.

From January 1, 2002 to February 28, 2003, the Branch applied the inflation
accounting methodology set forth by Technical Resolution No. 6, amended by
Technical Resolutions Nos. 17 and 19 of the Argentine Federation of Professional
Councils of Economic Sciences (FACPCE) and by the Professional Council of
Economic Sciences of the City of Buenos Aires (CPCECABA), using indexes derived
from the Internal Wholesale Price Index.

3.2 Valuation and presentation principles

a) Presentation

The financial statements are presented in accordance with the presentation
principles established by the accounting standards generally accepted in the
Republic of Argentina and pursuant to the provisions of the CNV.

Investments to become due or to be realized in the short term (within 3 months
of period end) are considered a cash equivalent in the statement of cash flows.

Certain reclassifications were made to the financial statements presented as
comparative information to conform them to the presentation used in this fiscal
year.

b) Participating interest in joint ventures

The Branch is engaged in exploration and production activities in certain areas
through its participation in joint ventures with other companies. The account
balances reflecting the joint ventures' assets, liabilities, income and expenses
are proportionately consolidated in these financial statements.

c) Foreign currency

Assets and liabilities denominated in foreign currency as listed in Exhibit F
have been stated in Argentine Pesos at the exchange rate prevailing at the end
of each fiscal period. The resulting exchange gains/losses are presented in the
financial results line (provided by either assets or liabilities, as applicable)
of the Statement of Income.

d) Inventories

Crude oil is stated at reproduction cost. Spare parts, materials and raw
materials are stated at the latest acquisition cost. Goods in transit are stated
at acquisition cost plus import expenses. Advances to suppliers are valued at
the amounts actually incurred.

The carrying value of inventories, taken as a whole and after considering the
allowance for obsolescence (see Note 3.2.g), does not exceed their recoverable
value.

e) Property, plant and equipment

Property, plant and equipment are stated at acquisition cost as indicated in
Note 3.1 less the related accumulated depreciation. The acquisition cost
includes all the necessary costs incurred in order to put the assets in working
condition.

Depreciation is calculated by applying the straight-line method over the
estimated useful lives of the assets and/or the duration of the contracts, as
applicable, except for production wells, equipment and services, which are
depreciated as per the units of production method.

The pre-operating costs of the properties in the exploration stage, except for
geology and geophysics related expenses that are charged to the Statement of
Income as incurred, remain capitalized for a given period based on the
characteristics of each property, without exceeding five years considered as
from the completion of the exploration stage or, if applicable, as from
production interruption, unless:

1. it is expected that explored areas will proceed to the commercial production
stage, in which case the referred costs remain capitalized, or

2. during the referred five year period, management estimates that commercial
production will not be feasible, in which case, the referred costs are expensed.

For Property, plant and equipment existing as of January 6, 2002, the
acquisition or construction of which resulted in outstanding liabilities
denominated in foreign currency - exchange gains/losses resulting from restating
such liabilities totaling $1,832,303,600 through July 28, 2003 were capitalized
pursuant to specific accounting principles, based on the determination of the
direct or indirect ratio between the assets subject to capitalization and the
outstanding liabilities in foreign currency. The assets or group of assets
eligible for the capitalization of exchange gains/losses have remained
unchanged. Such capitalization of exchange gains/losses was performed in
proportion to the balance of the original value of the referred assets not
subject to depreciation. Additionally, exchange gains and losses were
capitalized up to the limit arising from the comparison between the replacement
or reproduction cost of the assets and their recoverable value.

For the purposes of presenting the financial statements in constant currency
(see Note 3.1), the capitalized exchange gains/losses amounting to $
1,832,303,600 are considered an anticipated inflation adjustment until such
differences are absorbed thereby. The excess of capitalized exchanges losses
over the amounts in constant currency totals $ 85,358,131 as of March 31, 2008.

The net carrying value of property, plant and equipment, taken by group of
assets of similar characteristics, does not exceed their estimated value in use
based on the information available as of the date of issuance of the financial
statements.

f) Intangible assets

These are pre-production geological expenditures and acquisition cost of blocks
valued at restated cost as indicated in Note 3.1., less the related accumulated
amortization. Amortization is calculated as per the units of production method.

g) Allowances, Provisions and Accruals

Allowances deducted from assets:

- For bad debtors: they are determined following the detailed analysis of the
credit status of each customer.

- For obsolescence of materials: the Branch creates an allowance for those
assets evidencing significant slow movement based on a specific analysis.

Accruals:

- For lawsuits: they are determined considering the potential costs of those
lawsuits filed against the Branch based on the opinion of the legal counsels.

Provisions:

- For future compensation to personnel: they are estimated as a percentage of
compensation paid, calculated in terms of actuarial methods, and can be applied
to compensate employees of the Branch who have complied with certain seniority
requirements defined by the Branch. Payments are debited from the related
provision.

- For environmental remediation: calculated on the basis of well-abandonment
forecasts until the expiration of agreements, at present values.

h) Income tax

The Branch applies the deferred tax method to account for income tax. Based on
the referred method, the current income tax is calculated by applying the rates
prevailing as of March 31, 2008 and 2007 on taxable income; and the future tax
effect of the temporary differences in the book and tax values of assets and
liabilities and the tax loss carryforwards, if any, are recognized as deferred
tax assets or liabilities. The adjustment for inflation of property, plant and
equipment as described in note 3.2.e) is considered to be a temporary difference
for deferred tax computations.

The deferred tax assets are recognized only to the extent of their
recoverability.

i) Use of estimates

The preparation of the financial statements in accordance with generally
accepted accounting principles requires that the Branch management makes
estimates about the value of certain assets and liabilities, including
contingent liabilities, as well as the amounts informed of certain income and
expenses generated during the fiscal period.

The final amounts may differ from the estimates used in the preparation of the
financial statements.

j) Defined benefit pension plans

The Branch implemented a pension plan for the benefit of its personnel called
"Plan Puente" or "Bridge Plan". The amount accrued upon the implementation of
such plan as of March 31, 2008 amounts to $ 135,119,531 ($ 128,930,896 as of
December 31, 2007) presented under Other non current liabilities, out of which
the amount of $ 6,284,343 accrued in the three-month period ended December 31,
2008. Such amount is made up of $ 250,811,178 of nominal value less
$ 115,292,099 corresponding to the financial effect from the discount to present
value and payments in the amount of $ 399,547.

k) Revenue recognition

Revenue derived from the sale of hydrocarbons is recognized when the significant
risks and rewards of ownership have been transferred to the purchaser.

The Branch uses the production method to recognize revenues from the sale of
oil. In those cases where the Branch has a shared interest with other producers,
revenues are recorded upon the basis of the interest held in each joint venture.

In order to recognize revenues from the sale of gas, the Branch uses the sales
method, whereby these revenues are recorded on the basis of the actual volumes
delivered to purchasers irrespective of whether they result form the Branch's
own output or from the output shared with other producers.

l) Lease agreements

The Branch leases the space occupied by its offices, which agreements are of an
operating nature and, therefore, the expenses incurred are recognized in the
Statement of income to the extent they are accrued.

The amount of the leases, broken down by maturity dates, is reported below:

Nominal value

Up to one year US$ 2,670,232 and $ 1,212,397

Over one year and up to five years US$ 1,922,616 and $ 1.346,000

During the three-month period ended March 31, 2008, the Branch recognized an
expense of $ 2,400,053 related to such lease agreements presented in the line
Buildings Rentals and Maintenance in Exhibit G.

NOTE 4 - BREAKDOWN OF CERTAIN BALANCE SHEET ACCOUNTS

                                                                       03/31/2008         12/31/2007
                                                               ------------------ ------------------
ASSETS
CURRENT ASSETS

a) Cash and banks

  Cash on hand in local currency                                          217,951            219,522
  Cash on hand in foreign currency (Exhibit F)                             64,583            185,683
  Cash in banks in local currency                                      30,358,668         33,403,569
  Cash in banks in foreign currency (Exhibit F)                         1,449,682            178,834
                                                               ------------------ ------------------

  Total                                                                32,090,884         33,987,608
                                                               ================== ==================

b) Accounts receivable

  Accounts receivable in local currency                               121,815,651        120,830,313
  Allowance for bad debtors in local currency (Exhibit D)           ( 10,197,186)      ( 10,197,186)
  Accounts receivable in foreign currency (Exhibit F)                 786,506,576        387,251,549
  Related companies in foreign currency
(Note 9 and Exhibit F)                                                  2,677,513                  -
                                                               ------------------ ------------------

  Total                                                               900,802,554        497,884,676
                                                               ================== ==================

c) Other receivables

  Loans to personnel                                                    8,826,096          9,436,752
  Tax credits                                                           6,945,423         11,845,980
  Expenses recoverable in local currency                                5,240,299          5,105,747
  Expenses recoverable in foreign currency (Exhibit F)                  2,942,212          1,923,308
  Prepaid expenses in local currency                                   19,093,508         14,164,348
  Miscellaneous in local currency                                      38,195,887         34,220,853
  Miscellaneous in foreign currency (Exhibit F)                         6,359,872          9,476,145
  Affiliated companies in foreign currency (Note 9
and Exhibit F)                                                          9,791,140          2,286,719
                                                               ------------------ ------------------

  Total                                                                97,394,437         88,459,852
                                                               ================== ==================

d) Inventories

  Crude oil in stock                                                  167,948,870        116,679,969
  Spare parts, materials and raw materials                             63,456,184         56,281,193
                                                               ------------------ ------------------

  Subtotal (Exhibit E)                                                231,405,054        172,961,162

  Allowance for obsolescence of materials (Exhibit D)                ( 3,309,418)       ( 3,309,418)
                                                               ------------------ ------------------

  Subtotal                                                            228,095,636        169,651,744

  Goods in transit                                                      9,367,343         14,921,350
  Advances to suppliers in local currency                               5,364,319          4,333,388
  Advances to suppliers in foreign currency (Exhibit F)                   576,215            572,715
                                                               ------------------ ------------------

  Total                                                               243,403,513        189,479,197
                                                               ================== ==================

                                                                       03/31/2008         12/31/2007
                                                               ------------------ ------------------
NON CURRENT ASSETS

e) other receivables

  Loans to personnel                                                   12,152,286         11,037,708
  Prepaid expenses in local currency                                    1,009,865          1,377,539
  Miscellaneous in local currency                                      26,048,900         26,419,281
  Miscellaneous in foreign currency (Exhibit F)                        14,108,521         14,304,701
                                                               ------------------ ------------------

  Total                                                                53,319,572         53,139,229
                                                               ================== ==================

LIABILITIES

CURRENT LIABILITIES

f) Accounts payable

  Trade payables in local currency                                    562,887,085        440,920,083
  Trade payables in foreign currency (Exhibit F)                      144,089,130        159,701,798
  Expenses payable in local currency                                   34,155,753         39,244,409
  Affiliated companies in foreign currency (Note 9 and
Exhibit F)                                                              4,250,044          5,183,546
                                                               ------------------ ------------------

  Total                                                               745,382,012        645,049,836
                                                               ================== ==================

g) Loans

  Unsecured notes payable in local currency                           208,947,467        263,824,044
  Unsecured notes payable in foreign currency
(Exhibit F)                                                           621,158,012        405,650,487
  Interest accrued on bonds and notes payable in foreign
currency (Exhibit F)                                                   78,704,481         75,833,146
                                                               ------------------ ------------------

  Total                                                               908,809,960        745,307,677
                                                               ================== ==================

h) Taxes payable

  Income tax provision net of advanced payments                       163,625,037        174,142,115
  Tax on sales and production                                         101,730,342         87,217,728
  Other                                                                 7,585,977          9,793,596
                                                               ------------------ ------------------

  Total                                                               272,941,356        271,153,439
                                                               ================== ==================

                                                                       03/31/2008         12/31/2007
                                                               ------------------ ------------------
NON CURRENT LIABILITIES

i) Accounts payable

  Miscellaneous liabilities in local currency                          31,710,974         31,777,958
  Miscellaneous liabilities in foreign currency (Exhibit F)            17,456,148         17,351,455
                                                               ------------------ ------------------

  Total                                                                49,167,122         49,129,413
                                                               ================== ==================

j) Loans

  Bonds in foreign currency (Exhibit F)                             1,108,800,000      1,102,150,000
  Unsecured notes payable in foreign currency
(Exhibit F)                                                         2,268,208,800      1,882,409,219
                                                               ------------------ ------------------

  Total                                                             3,377,008,800      2,984,559,219
                                                               ================== ==================

NOTE 5 - ISSUANCE OF BONDS

On February 11, 1997, Amoco Argentina Oil Company (Argentine Branch) issued the
Second Series of bonds in the amount of US$ 100,000,000 due in ten years, at an
annual 6.75% rate. The bonds were paid upon maturity on February 1, 2007. Such
issuance was made under the short and medium term bond program for a total
maximum amount of US$ 200,000,000 authorized by the CNV through Resolution No.
10982 on July 13, 1995.

As a result of the transfer of assets and liabilities referred to in the second
paragraph of Note 1 to these financial statements, Amoco Argentina Oil Company
(Argentine Branch) transferred the above mentioned bonds to Pan American Energy
LLC (Argentine Branch). Such bonds were guaranteed by BP Company North America
Inc. until repayment in February 2007.

On February 21, 2002, through Resolution No. 14123, the CNV authorized the
Global Program for the Issuance of Bonds of Pan American Energy LLC (Argentine
Branch) (the "Global Program") in the total amount of US$ 1,000,000,000.

On October 27, 2004, the Branch issued the Bonds Class 3 in the amount of
US$100,000,000 under the Global Program. The bonds become due in five years
(October 27, 2009) with a 7.125% annual fixed interest rate to be paid on a
half-yearly basis. The price of the issuance was 99.483% of the nominal value.
The funds obtained from this issuance were allocated to investments in property,
plant and equipment and repayment of loans.

On August 9, 2006, the Branch issued the Bonds Class 4 in the amount of US$
250,000,000 under the Global Program, to be repaid in two equal installments
becoming due on February 9, 2011 and February 9, 2012, with interest accruing at
an annual fixed interest rate of 7.75% to be paid on a half-yearly basis. The
price of the issuance was 100.00% of the nominal value. The funds obtained from
this issuance were allocated to investments in property, plant and equipment and
repayment of loans.

The Bonds Class 3 and Class 4 are guaranteed by Pan American Energy LLC.

NOTE 6 - OTHER FINANCIAL LIABILITIES

On July 11, 2005, the Branch obtained from the International Finance Corporation
(IFC) a loan in the amount of US$ 250,000,000 guaranteed by Pan American Energy
LLC and consisting of three tranches:

- "A" in the amount of US$ 100,000,000, with interest accruing at an annual
fixed rate of 7.56%, through an interest rate swap with IFC, amortizable on a
six-month installments basis and becoming due in July 2015;

- "B" in the amount of US$ 135,000,000, at an annual fixed rate of 6.97%,
through an interest rate swap with IFC, amortizable on a six-month installments
basis, and becoming due in July 2012, and

- "C" in the amount of US$ 15,000,000, at an annual fixed base rate of 5.66%
plus additional interest calculated in relation to Pan American Energy LLC�s
economic performance, becoming due in July 2016.

The first repayment of principal for tranches "A" and "B" was made on January
15, 2007.

The funds obtained were used to partially fund the 2005 investment program in
San Jorge Gulf.

On July 13, 2007, the Branch obtained from IFC a loan in the amount of US$
550,000,000, consisting of two tranches that accrue interest at a variable rate:

- "A" in the amount of US$ 150,000,000 amortizable on a six-month installments
basis and becoming due in April 2018; and

- "B", Sub-tranch1" in the amount of US$ 158,500,000 amortizable on a six-month
installments basis and becoming due in April 2014 and Sub-tranch "2" in the
amount of US$ 241,500,000 amortizable on a six-month installments basis and
becoming due in April 2015.

The loan is guaranteed by Pan American Energy LLC and the funds obtained are
being applied to partially fund the investment program that the Company will
undertake in the Cerro Drag�n area in San Jorge Gulf basin located in the
provinces of Santa Cruz and Chubut.

By December 31, 2007, the amount of US$ 400,000,000 of such loan had been
disbursed while the remaining amount of US$ 150,000,000 was disbursed in January
2008.

The Branch considers that its access to credit lines is appropriate in order to
meet its commercial and financial obligations, even though it presents a
negative working capital.

NOTE 7 - ACCOUNT WITH HEAD OFFICE

The changes in the account with Head Office during the fiscal three-month
periods ended March 31, 2008 and 2007 are as follows:

                                                                    Three-month period ended
                                                              -------------------------------------
                                                                    03/31/2008           03/31/2007
                                                              ---------------- --------------------

Balance at beginning of period with Head Office                  2,869,622,874        1,656,519,921
Net activity with Head Office                                                -        ( 21,582,772)
Transfer of income for the period                                  388,731,817          359,292,904
                                                              ---------------- --------------------
Net changes for the period                                         388,731,817          337,710,132
                                                              ---------------- --------------------

Balance at period-end of the account with Head Office (1)        3,258,354,691        1,994,230,053
                                                              ================ ====================

(1) of March 31, 2008 and as of March 31, 2007 the balances are in local
currency.

NOTE 8 - CAPITAL ALLOCATED TO THE BRANCH

Pursuant to the Consent Action taken by the members on December 27, 2001, Pan
American Energy LLC allocated capital to the Branch in the amount of $
200,000,000. Such capital is registered with the Public Registry of Commerce. In
accordance with the Consent Action dated February 1, 2005, Pan American Energy
LLC allocated capital to the Branch in the amount of $ 21,779,007. Such capital
contribution represents the contribution of assets and liabilities of the areas
Anticlinal Funes and R�o Barrancas made by Head Office within the scope of the
corporate reorganization registered in the State of Delaware, USA and in the
Public Registry of Commerce of the City of Buenos Aires on December 12, 2005
under number 2106, Book 58, Volume B of Foreign Companies.

NOTE 9 - TRANSACTIONS AND BALANCES WITH AFFILIATED COMPANIES

The transactions and balances with Pan American Energy LLC, the Branch's Head
Office, are disclosed in note 7.

The transactions and balances with affiliated companies are detailed below:

                                                                        2008                    2007
                                                                  (3 months)              (3 months)
TRANSACTIONS
   Pan American Fueguina S.A.
       Financing                                                           -             279,637,517

   Pan American Sur S,A,
       Lending of LPG                                                      -                 101,531

   PAE E & P Bolivia Ltd,
       Purchases and hiring of services                            5,123,260                 167,217

   PAE Oil & Gas Bolivia Ltd,
       Purchases and hiring of services                            2,381,161                   2,781

   BP West Coast Products LLC
       Sales                                                     810,667,450             317,839,999

   BP America Production Company
       Contracted services                                           700,440               1,494,329

BALANCES
   BP West Coast Products LLC
       Accounts receivable                                         2,677,513                       -

   PAE E & P Bolivia Ltd,
       Other receivables                                           6,288,537               1,165,277

   PAE Oil & Gas Bolivia Ltd,
       Other receivables                                           3,502,603               1,121,442

   BP America Production Company
       Accounts payable                                            2,154,760               1,910,240

   Pan American Sur S,A,
       Accounts payable                                            2,095,284               3,273,306

NOTE 10 - GUARANTEES AND OTHER COMMITMENTS

In terms of investment commitments, the Branch has not granted any guarantees as
of March 31, 2008.

The terms agreed in certain loan agreements include commitments assumed by the
Branch referring to the maintenance of certain indebtedness and debt service
ratios and certain restrictions on the distribution of dividends. As of December
31, 2007, the Branch complied with all the commitments assumed in loan
agreements.

The Branch signed the agreement entered into between producers and refineries on
January 2, 2003 for the stability of the prices of crude oil, gasoline and gas
oil (Resolution No. 85/2003 of the Energy Department), in force until April 30,
2004. The Branch has complied with the quotas set forth in the crude oil
agreement. Such deliveries were stated at spot price upon carrying out the
transaction, giving rise to a contingent receivable of $ 11,102,537 as of March
31, 2008, in favor of the Branch, which has not been recorded. Such receivable
will be collected when the crude oil WTI price be lower than US$28.50 per
barrel. The price thereof was US$ 101.59 as of March 31, 2008.

On February 27, 2006 the Branch executed an agreement with Shell C.A.P.S.A.
whereby Shell agreed to pay the Branch a total negotiated price of $86,499,326
in connection with deliveries of crude oil made in 2003 and 2004 under the price
stabilization agreement referred to in the preceding paragraph, and $ 14,032,834
as interest accrued. The Branch agreed to waive further claims in connection
with said deliveries. The related revenue was recognized in the year ended
December 31, 2006. Additionally, in September 2007, the Branch executed an
agreement with ESSO Petrolera Argentina S.R.L., whereby such company agreed a
total negotiated price of $ 7,966,366 in connection with deliveries of crude oil
made in 2003 and 2004 also under the price stabilization agreement referred to
above and $ 2,445,974 as interest. The Branch agreed to waive further claims in
connection with said deliveries. The related revenue was recognized in the
fiscal year ended December 31, 2007.

NOTE 11 - INCOME TAX

The breakdown of the main deferred tax assets and liabilities is as follows:

                                                                 03/31/2008          12/31/2007
                                                             ------------------- ------------------

Deferred tax assets
   Allowance for materials obsolescence                           1,158,296          1,158,296
   Provision for future compensation to personnel                 6,328,738          6,093,622
   Accrual for lawsuits                                           7,514,989          7,278,725
   Provision for environmental remediation                       11,565,208          11,231,039
   Other provisions and allowances                               16,298,895          18,656,518
                                                             ------------------- ------------------

Total deferred tax assets                                        42,866,126          44,418,200
                                                             ------------------- ------------------

Deferred tax liabilities
   Inventories - materials and spare parts                         890,517            890,517
   Property, plant and equipment                                 404,824,756        392,076,489
   Other                                                         32,025,429          41,148,515
                                                             ------------------- ------------------

Total deferred tax liabilities                                   437,740,702        434,115,521
                                                             ------------------- ------------------

Net deferred tax liabilities                                     394,874,576        389,697,321
                                                             =================== ==================

NOTE 11 - INCOME TAX (Cont.)

The reconciliation between the income tax expense for the three-month period and
that resulting from applying the prevailing tax rate to income before tax is as
follows:

                                                                    2008                2007
                                                             ------------------- ------------------
                                                                 (3 months)           (3 months)

Income for the three-month period before taxes                   606,258,184        545,895,732

Prevailing tax rate                                                  35%                35%
                                                             ------------------- ------------------
Income for the three-month period at prevailing tax rate        (212,190,364)      ( 191,063,506)

Permanent differences at the tax rate:
   Miscellaneous - net                                          ( 5,336,003)         4,460,678
                                                             ------------------- ------------------

Subtotal permanent differences at the tax rate                  ( 5,336,003)         4,460,678
                                                             ------------------- ------------------

Income tax - total                                              (217,526,367)      ( 186,602,828)
                                                             =================== ==================

Current income tax expense                                      (212,349,112)      ( 204,821,539)
Deferred income tax benefit (expense)                           ( 5,177,255)         18,218,711
                                                             ------------------- ------------------
                                                                (217,526,367)      ( 186,602,828)
                                                             =================== ==================

NOTE 12 - RESTRICTED ASSETS

In August 2007, the Branch collected a bank deposit made in its own name as
collateral for a loan from a foreign bank in fiscal year 2005. Such bank deposit
amounted to US$ 1,764,705.

In August 2007, the pledge of two generators was settled in the amount of US$
7,483,776. Such equipment was granted as collateral for outstanding accounts
payable that were paid in June 2007.

Therefore, there are no restricted assets as of March 31, 2008.

NOTE 13 - INFORMATION ON LITIGATION AND OTHER SUPPLEMENTARY MATTERS

Lawsuits were filed against the Branch, particularly with courts in labor and
commercial matters. Based on the information available, the Branch's Management
and legal advisors consider that the contingent liability that might arise from
such lawsuits would not have a material adverse effect on the financial position
of the Branch or the results of its operations.

NOTE 14 - AGREEMENTS WITH THE PROVINCES OF CHUBUT AND SANTA CRUZ

The Branch entered into investment commitments and agreements with the Argentine
provinces of Chubut (04/27/2007) and Santa Cruz (06/25/2007) for the extension
of the term of the concession for hydrocarbon exploitation for a ten-year period
in the blocks known as Cerro Drag�n, the area of which extends over the
territory of both provinces, and Piedra Clavada and Koluel Kaike in the province
of Santa Cruz. The original term of the agreements expired between 2016 and
2017.

These agreements provided for, among other obligations, minimum investments of
US$ 2,000,000,000 in the Province of Chubut and US$ 500,000,000 in the Province
of Santa Cruz to be made before 2017.

operating agreements referred to below.

Furthermore, other investments of US$ 1,000,000,000 in the Province of Chubut
and US$300,000,000 in the Province of Santa Cruz are to be made before 2027 as a
condition for PAE to be granted the operation agreements referred to below.

The agreements also provided for a US$ 80,000,000 investment commitment for
off-shore exploration, at the Branch's own risk, by means of two joint ventures
(UTEs) created with the state-run companies Petrominera (in the case of Chubut)
and Fomicruz (in the case of Santa Cruz). The potential exploration success and
future business activities imply that an additional investment commitment in the
amount of US$500,000,000 be required for the development of the offshore fields.

The creation of the UTEs referred to in the preceding paragraph is consistent
with the provisions of sections 11 and 95 of the Hydrocarbon Law, which allows
state-run companies to enter into agreements and create companies, partnerships
or other associations with individuals or entities for the development of their
activities.

The operation agreements entered into with state-run companies also fall within
the scope of the referred legislation, which shall be effective by the year
2027, subject to compliance with the investment commitments and Pan American
Energy's exploration success in developing sufficient reserves to continue with
the production of the fields of those areas as from that year.

Based on these agreements, during the remaining term of the concessions, the
Branch agreed to pay to the respective provinces an additional amount of 3% of
the net revenues for certain items described in the agreements. The Branch will
also provide money for the development of infrastructure and the economic
diversification of the Provinces of Chubut and Santa Cruz. A number of grants
will be awarded, loans given or guaranteed, job opportunities offered, and
supplementary actions will be performed by the Branch as well.

The agreement with the province of Chubut was ratified by provincial law No.
5616 passed by the Provincial Congress on May 24, 2007, enacted by decree No.
500/2007 and published in the Official Bulletin on May 28, 2007.

The agreement with the province of Santa Cruz was ratified by provincial law No.
3009 issued by the Provincial Congress on March 13, 2008, enacted by decree No.
545/2008 and published in the Official Bulletin on March 27, 2008.

NOTE 15 - SUBSEQUENT EVENTS

No events or transactions have occurred from period-end to the date of issuance
of these financial statements that would have a material effect on the financial
position of the Branch or the results of its operations as of that date.

EXHIBIT A

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

PROPERTY, PLANT AND EQUIPMENT (in pesos)

as of March 31, 2008 and December 31, 2007

                                                          Original values
                            ----------------------------------------------------------------------------
                                  At
                               beginning    Increases for                                       At
       Main account            of period     the period     Transfers        Decreases      period-end
--------------------------- --------------- ------------- -------------- ---------------- --------------


Land and buildings               63,181,291             -        131,708            -         63,312,999
Plants, wells and
 exploration and
production facilities        14,032,607,241    47,050,217    157,457,319      217,376     14,236,897,401
Furniture and office
 supplies                         8,149,389             -              -            -          8,149,389
Equipment                       155,628,892             -      4,154,375            -        159,783,267
Vehicles                         48,081,219             -        589,608            -         48,670,827
Work in progress                804,921,605   568,202,237 (154,326,751))            -      1,218,797,091
Advances to suppliers            40,170,877     3,365,956   ( 8,006,259)            -         35,530,574
                            --------------- ------------- -------------- ------------     --------------

Total as of 03/31/2008       15,152,740,514   618,618,410              -      217,376     15,771,141,548
                            =============== ============= ============== ============     ==============

Total as of 12/31/2007       12,909,726,416 2,398,016,058              -  155,001,960     15,152,740,514
                            =============== ============= ============== ============     ==============

                                                    Depreciation
                              --------------------------------------------------------
                               Accumulated                              Accumulated            Net            Net
                               at beginning                                  at               as of          as of
       Main account             of period       Increases  Decreases     period-end          03/31/08      12/31/07
---------------------------   -------------- ------------ ----------- ----------------    -------------- -------------
                                                  (1) (2)

Land and buildings                28,155,518      927,748           -       29,083,266        34,229,733    35,025,773
Plants, wells and
 exploration and
production facilities          7,584,535,941  182,871,655     204,227    7,767,203,369     6,469,694,032 6,448,071,300
Furniture and office
 supplies                          7,981,530       18,796           -        8,000,326           149,063       167,859
Equipment                        121,482,040    5,435,069           -      126,917,109        32,866,158    34,146,852
Vehicles                          27,334,072    1,830,011           -       29,164,083        19,506,744    20,747,147
Work in progress                           -            -           -                -     1,218,797,091   804,921,605
Advances to suppliers                      -            -           -                -        35,530,574    40,170,877
                              -------------- ------------ ----------- ----------------    -------------- -------------

Total as of 03/31/2008         7,769,489,101  191,083,279     204,227    7,960,368,153     7,810,773,395
                              ============== ============ =========== ================    ==============

Total as of 12/31/2007         7,039,238,260  769,123,691  38,872,850    7,769,489,101                   7,383,251,413
                              ============== ============ =========== ================                   =============

(1) See Exhibit G.

(2) See depreciation policies in Note 3.2.e.

EXHIBIT B

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

INTANGIBLE ASSETS (in pesos)

as of March 31, 2008 and December 31, 2007

                       Original values                                              Amortization
 -----------------------------------------------------------------------------------------------------------------------

                          Increases Decreases             Accumulated           Decreases
                  At         for       for                    at                   for    Accumulated   Net      Net
  Main         beginning    the       the         At       beginning   For the    the         at       as of    as of
   account     of period    period    period  period-end   of period   period     period  period-end  03/31/08 12/31/07
------------- ----------- --------- --------- ----------- ----------- --------- --------- ----------- -------- --------
                                                                        (1) (2)
Pre-operating
 expenses     48,740,915      -         -     48,740,915  48,353,074    8,128       -     48,361,202  379,713  387,841
Acquisition
 cost of
 blocks        6,487,247      -         -      6,487,247   6,484,619    2,628       -      6,487,247     -      2,628
Deferred
 charges      63,488,027      -         -     63,488,027  63,488,027      -         -     63,488,027     -        -
              ----------- --------- --------- ----------- ----------- --------- --------- ----------- -------- --------

Total as of
 03/31/2008   118,716,189     -         -     118,716,189 118,325,720  10,756       -     118,336,476 379,713
              =========== ========= ========= =========== =========== ========= ========= =========== ========

Total as of
 12/31/2007   118,716,189     -         -     118,716,189 116,797,422 1,528,298     -     118,325,720
              =========== ========= ========= =========== =========== ========= ========= ===========
                                                                                                               390,469
                                                                                                               ========

(1) See Exhibit G.

(2) See amortization policies in Note 3.2.f.

EXHIBIT C

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

OTHER INVESTMENTS (in pesos)



                                                                                      Book        Book
                                                                                     value        value
             Main account                                                          03/31/2008  12/31/2007

Short-term investments

Mutual funds in foreign currency (Exhibit F)                                             1,171       1,138

   Class: Citi Institutional Liquid Reserves
   Quantity: 374 units
   Quoted: US$ 1
   (US dollar)

Government securities
   "Certificados de cancelaci�n de deuda impositiva" (Certificates
   evidencing payment of tax liability ,Government of the Province of Chubut)
   Coupons Nos, 18, 19 and 20                                                        2,058,680   1,500,411

Time deposits in foreign currency (Exhibit F)                                        7,389,986 218,595,022

Special deposit account in foreign currency (Exhibit F)                            594,912,714 230,996,906

           Total short-term investments                                            604,362,551 451,093,477

Long-term investments

Government securities:
   Bonos de la Rep�blica Argentina - Discount bonds
   in pesos 5.83% final maturity in 2033
   Quantity: 4,821,350
   Face value: $ 1
   Quotation value: $ 1.0925                                                         5,267,325   5,592,766
   GDP coupon pesos
   Quantity: 14,306,676
   Face value: $ 1
   Quotation value: $ 0,0994                                                         1,422,083   1,258,987

   "Certificados de cancelaci�n de deuda impositiva" (Certificates
   evidencing payment of tax liability ,Government of the Province of Chubut)
   Coupons Nos, 21m 22 and 23                                                        2,058,680   2,680,093

Shares:
   Garantizar S,A,
   Quantity: 2000
   Class: B
   Face value: $ 1                                                                       2,000       2,000

           Total long-term investments                                               8,750,088   9,533,846

           Total investments                                                       613,112,639 460,627,323

EXHIBIT D

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

ALLOWANCES, PROVISIONS AND ACCRUALS (in pesos)

as of March 31, 2008 and December 31, 2007

                                       Balances at                      Decreases      Balances as
                                       beginning of    Increases for      for the            of
           Main account                   period        the period         period        03/31/08
-----------------------------------  ----------------  -------------    -----------    -------------
Deducted from current assets:
Allowance for bad debtors in
 foreign
currency                                   10,197,186              -              -       10,197,186
Allowance for obsolescence of
materials                                   3,309,418              -              -        3,309,418
                                     ----------------  -------------    -----------    -------------

Total deducted from assets                 13,506,604              -              -       13,506,604
                                     ================  =============    ===========    =============

Included in current liabilities:

Provision for future compensation
to personnel                                2,461,743         14,312 (1)          -        2,476,055
                                     ----------------  -------------    -----------    -------------

Subtotal current liabilities                2,461,743         14,312              -        2,476,055
                                     ----------------  -------------    -----------    -------------

Included in non current
 liabilities:

Accrual for lawsuits                       20,217,498      1,059,042 (2)    310,395 (3)   20,966,145
Provision for environmental
remediation                                82,182,464      1,691,480 (4)  1,223,896 (5)   82,650,048
Provision for future compensation
to personnel                               15,241,426      1,246,407 (6)    591,098 (7)   15,896,735
                                     ----------------  -------------    -----------    -------------

Subtotal non current liabilities          117,641,388      3,996,929      2,125,389      119,512,928
                                     ----------------  -------------    ===========    -------------

Total included in liabilities             120,103,131      4,011,241      2,125,389      121,988,983
                                     ================  =============    ===========    =============

(1) Transfer from the non current provision for future compensation to
personnel.

(2) Charges for the period. It is made up of $ 767,075 included in production
costs (see Exhibit G) and $ $ 291,967 included in administrative expenses (see
Exhibit G) of the Statement of Income.

(3) Payments for the period.

(4) Charges for the period. It is made up of $ 1,442,695 included in financial
results provided by liabilities and $ 248,785 included in property, plant and
equipment.

(5) Uses for the period.

(6) Charges for the period. They are included in the financial results line of
the Statement of Income and in Exhibit G.

(7) It is made up of compensations paid during the period in the amount of $
576,786 and the transfer referred to in line 1 in the amount of $ 14,312.

EXHIBIT E

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

COST OF SALES (in pesos)

for the three-month period beginning January 1, 2008 and ended March 31, 2008,
comparative with the same period of the prior year

                                                               2008                2007
                                                        ------------------- ------------------
                                                            (3 months)          (3 months)

Inventories at the beginning of year                        172,961,162        117,701,356

Purchases                                                   39,302,730          47,481,091

Production costs (Exhibit G)                                722,019,720        563,330,412

Inventories at period-end                                  (231,405,054)      ( 53,011,005)
                                                        ------------------- ------------------

Cost of sales                                               702,878,558        675,501,854
                                                        =================== ==================

EXHIBIT F

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

ASSETS AND LIABILITIES IN FOREIGN CURRENCY

as of March 31, 2008 and December 31, 2007

                                                                  Amount in                                  Amount in
                         Type and amount   Exchange              Argentine     Type and amount              Argentine
                                 of                              currency as      of foreign                 currency
                         foreign currency                             of           currency                    as of
             Item                as of       rate                              as of 12/31/2007
                                03/31/2008                         03/31/2008                                12/31/2007
------------------------ ----------------- --------             ------------- -----------------             -----------
                             US$     Euros    $         (1)          (1)          US$     Euros     (2)         (2)
ASSETS

CURRENT ASSETS

Cash on hand and in
 banks
  Cash on hand                     - 4,370   4.9454      21,611             -           - 4,370      19,981
                              13,738     -    3.128      42,972        64,583      53,298           165,702     185,683
                                                    -----------                                 -----------
  Cash in banks
    Domestic                  26,123     -    3.128      81,714                    25,275            78,581
    Foreign                  437,330     -    3.128   1,367,968     1,449,682      32,246           100,253     178,834
                                                    -----------                                 -----------

Investments
  Time deposits in
   foreign currency        2,362,527     -    3.128                 7,389,986  70,310,396                   218,595,022
  Mutual funds in
   foreign currency              374     -    3.128                     1,171         366                         1,138
  Special deposit
   account in foreign
   currency              190,189,487     -    3.128               594,912,714  74,299,423                   230,996,906

Accounts receivable
      Domestic           149,374,052     -    3.128 467,242,035               116,860,806       363,320,247
  Foreign                102,066,669     -    3.128 319,264,541   786,506,576   7,697,427        23,931,302 387,251,549
                                                    -----------                                 -----------
  Foreign related
   companies                 855,982     -    3.128                 2,677,513           -                             -

Other receivables
      Expenses
       recoverable -
       foreign               940,605     -    3.128                 2,942,212     618,626                     1,923,308
      Miscellaneous -
       domestic              434,732     -    3.128   1,359,842             -     435,222         1,353,106
      Miscellaneous -
       foreign             1,598,475     -    3.128   5,000,030     6,359,872   2,612,750         8,123,039   9,476,145
                                                    -----------                                 -----------
      Foreign affiliated
       companies           3,130,160     -    3.128                 9,791,140     735,516                     2,286,719

Inventories
  Advances to suppliers
   -
  foreign                    184,212     -    3.128                   576,215     184,212     -                 572,715
                         ----------- -----                      ------------- ----------- -----             -----------

      Total current
       assets            451,614,466 4,370                      1,412,671,664 273,865,563 4,370             851,468,019
                         ----------- -----                      ------------- ----------- -----             -----------

NON CURRENT ASSETS

Other receivables
      Miscellaneous -
       domestic            4,510,397     -    3.128                14,108,521   4,601,062     -              14,304,701
                         ----------- -----                      ------------- ----------- -----             -----------

      Total non current
       assets              4,510,397     -                         14,108,521   4,601,062     -              14,304,701
                         ----------- -----                      ------------- ----------- -----             -----------

      Total assets       456,124,863 4,370                      1,426,780,185 278,466,625 4,370             865,772,720
                         =========== =====                      ============= =========== =====             ===========

US$ = US dollar

(1) As per buyer exchange rate as of March 31, 2008.

(2) As per buyer exchange rate as of December 31, 2007.

EXHIBIT F

(Cont.)

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

ASSETS AND LIABILITIES IN FOREIGN CURRENCY

as of March 31, 2008 and December 31, 2007

                                                                  Amount in                                 Amount in
                       Type and amount   Exchange                Argentine      Type and                   Argentine
                               of                                currency as    amount of                  currency as
                       foreign currency                               of         foreign                        of
                                                                                 currency
         Item                  as of       rate                                   as of
                              03/31/2008                           03/31/2008   12/31/2007                   12/31/2007
---------------------- ----------------- --------               ------------- -------------               -------------
                              US$           $          (1)           (1)           US$           (2)           (2)
LIABILITIES

CURRENT LIABILITIES

Accounts payable
  Trade - domestic            43,328,402    3.168   137,264,378                  48,454,730   152,583,946
  Trade - foreign              2,154,278    3.168     6,824,752   144,089,130     2,260,353     7,117,852   159,701,798
                                                  -------------                             -------------
  Affiliated companies
   - domestic                    661,390    3.168     2,095,284                   1,039,475     3,273,306
  Affiliated companies
   - foreign                     680,164    3.168     2,154,760     4,250,044       606,618     1,910,240     5,183,546
                                                  -------------                             -------------

Loans
  Unsecured notes
   payable - domestic        150,000,000    3.168   475,200,000                  82,000,000   258,218,000
  Unsecured notes
   payable - foreign          46,072,605    3.168   145,958,012   621,158,012    46,818,827   147,432,487   405,650,487
                                                  -------------                             -------------
  Interest accrued on
    bonds and notes
     payable                  24,843,586    3.168                  78,704,481    24,081,660                  75,833,146
                       -----------------                        ------------- -------------               -------------

                                                                -------------
Total current
 liabilities                 267,740,425                          848,201,667   205,261,663                 646,368,977
                       -----------------                        ------------- -------------               -------------

NON CURRENT
 LIABILITIES

Accounts payable
  Miscellaneous
   liabilities -
   foreign                     5,510,148    3.168                  17,456,148     5,510,148                  17,351,455

Loans
  Bonds - foreign            350,000,000    3.168               1,108,800,000   350,000,000               1,102,150,000
  Unsecured notes
   payable - domestic                  -        -             -             -    15,000,000    47,235,000             -
  Unsecured notes
   payable - foreign         715,975,000    3.168 2,268,208,800 2,268,208,800   582,780,000 1,835,174,219 1,882,409,219
                       -----------------          ------------- ------------- ------------- ------------- -------------

  Total non current
   liabilities             1,071,485,148                        3,394,464,948   953,290,148               3,001,910,674
                       -----------------                        ------------- -------------               -------------

  Total liabilities        1,339,225,573                        4,242,666,615 1,158,551,811               3,648,279,651
                       =================                        ============= =============               =============

US$ = US dollar

(1) As per seller exchange rate as of March 31, 2008.

(2) As per seller exchange rate as of December 31, 2007.

EXHIBIT G

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

INFORMATION REQUIRED BY ART. 64, CLAUSE 1b) OF LAW 19550, for the three-month
period beginning January 1, 2008 and ended March 31, 2008, comparative with the
same period of the prior year (in pesos)

                                           Production    Administrative
  Items                                       costs         expenses        Total 2008     Total 2007
----------------------------------------  ------------- ---------------- --------------- --------------
                                                                           (3 months)      (3 months)

Fees and compensation for services            4,732,804        4,806,775       9,539,579      8,379,347
Salaries, wages and benefits to
personnel                                    49,976,210        9,061,825      59,038,035     40,500,441
Defined benefit plans to personnel
(Note 3.2.j)                                  1,573,834          780,470       2,354,304      1,543,319
Social security contributions                 6,403,249        1,581,604       7,984,853      5,136,341
Taxes, assessments and other
 contributions                              303,065,665       36,673,784     339,739,449    203,191,019
Depreciation of property, plant and
 equipment
(Exhibit A)                                 188,682,502        2,400,777     191,083,279    200,991,260
Intangible asset amortization (Exhibit
 B)                                              10,756                -          10,756        405,814
Transportation, freight and storage
 expenses                                    30,262,570           14,605      30,277,175     35,691,377
Contracted services                         112,675,165        2,943,784     115,618,949     91,333,362
Travel and accommodation expenses             2,573,453        1,885,645       4,459,098      2,849,545
Building rentals and maintenance              8,675,021        4,359,346      13,034,367      7,240,248
Environmental remediation and rights of
 way                                         10,032,068                -      10,032,068      5,392,182
Lawsuits (Exhibit D)                            767,075          291,967       1,059,042        712,402
Production, exploration and
 administrative
general expenses                              2,589,348           55,460       2,644,808     15,966,665
                                          ------------- ---------------- --------------- --------------

Total 2008 (3 months)                       722,019,720       64,856,042     786,875,762
                                          ============= ================ ===============

Total 2007 (3 months)                       563,330,412       56,002,910                    619,333,322
                                          ============= ================                 ==============

EXHIBIT H

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

Balance sheet as of March 31, 2008 and December 31, 2007

TERMS, INTEREST RATES AND ADJUSTMENT CLAUSES OF SHORT-TERM INVESTMENTS, LOANS,
RECEIVABLES AND PAYABLES (in pesos)

                     Investments                   Receivables
             ---------------------------- ------------------------------
              03/31/2008     12/31/2007     03/31/2008     12/31/2007
             ------------- -------------- -------------- ---------------

Total amount
 without any
 established
 term        1,424,083 (1)      1,260,987 97,964,706 (3)     101,806,117

To become
 due:

Up to 3
 months        602,990,097    450,344,176    924,512,880     515,078,238
From 3 to 6
 months            686,227              -      1,891,465       1,718,540
From 6 to 9
 months                  -        670,023      1,785,205       1,674,756
From 9 to 12
 months            686,227         79,278      2,202,716       1,610,016
From 1 to 2
 years           1,372,453      1,340,047      5,909,985       5,651,924
From 2 to 3
 years             686,227      1,340,046      4,308,811       3,793,343
From 3 to 4
 years                   -              -      1,664,563       1,574,957
From 4 to 5
 years                   -              -        956,972         848,516
From 5 to 6
 years                   -              -        413,073         382,649
From 6 to 7
 years                   -              -              -               -
From 7 to 8
 years                   -              -              -               -
From 8 to 9
 years                   -              -              -               -
From 9 to 10
 years                   -              -              -               -
From 10 to
 11 years                -              -              -               -
Over 11
 years       5,267,325 (2)  5,592,766 (2)              -               -
             ------------- -------------- -------------- ---------------

Subtotal       613,112,639    460,627,323  1,041,610,376     634,139,056

Other items
 that are
 not to be
 collected
 or paid in
 cash                    -              -     20,103,373      15,541,887
             ------------- -------------- -------------- ---------------

Total          613,112,639    460,627,323  1,061,713,749     649,680,943
             ============= ============== ============== ===============

                       Payables                      Loans
             ---------------------------- ---------------------------
                03/31/2008     12/31/2007    03/31/2008    12/31/2007
             ------------- -------------- ------------- -------------

Total amount
 without any
 established
 term          677,475,555    664,952,181             -             -

To become
 due:

Up to 3
 months      1,021,368,550    754,732,049   578,197,480   566,991,809
From 3 to 6
 months            619,014    174,757,551   229,854,240   123,035,173
From 6 to 9
 months            619,014        615,436             -    55,280,695
From 9 to 12
 months         24,583,514     30,986,936   100,758,240             -
From 1 to 2
 years             232,457        229,339   682,418,880   655,218,728
From 2 to 3
 years                   -              -   761,618,880   293,083,728
From 3 to 4
 years                   -              -   761,618,880   686,708,728
From 4 to 5
 years                   -              -   329,978,880   686,708,728
From 5 to 6
 years                   -              -   294,338,880   222,237,526
From 6 to 7
 years                   -              -   248,402,880   189,236,006
From 7 to 8
 years                   -              -   126,292,320   113,722,986
From 8 to 9
 years                   -              -    97,574,400    83,398,116
From 9 to 10
 years                   -              -    50,054,400    36,163,116
From 10 to
 11 years                -              -    24,710,400    18,081,557
Over 11
 years                   -              -             -             -
             ------------- -------------- ------------- -------------

Subtotal     1,724,898,104  1,626,273,492 4,285,818,760 3,729,866,896

Other items
 that are
 not to be
 collected
 or paid in
 cash                    -              -             -             -
             ------------- -------------- ------------- -------------

Total        1,724,898,104  1,626,273,492 4,285,818,760 3,729,866,896
             ============= ============== ============= =============

(1) It includes $ 1,422,083 relating to GDP coupons in pesos. The government
securities linked to the GDP become due on 12/31/2035. However, in the event a
certain GDP rate growth is exceeded in the country, the bondholders shall be
entitled to annual payments.

(2) It is amortized as from 06/30/2024 in 20 semiannual installments (on 06/30
and 12/31 of each year), the final maturity of which is on 12/31/2033.

(3) It includes the overdue receivables detailed in item 3.a of the
supplementary information.

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH) EXHIBIT H

(Cont.)

Balance sheet as of March 31, 2008 and December 31, 2007

TERMS, INTEREST RATES AND ADJUSTMENT CLAUSES OF SHORT-TERM INVESTMENTS, LOANS,
RECEIVABLES AND PAYABLES (in pesos)

                     Investments                        Receivables
          --------------------------------- -----------------------------------
                03/31/2008       12/31/2007         03/31/2008       12/31/2007
          ---------------- ---------------- ------------------ ----------------
          Rate      Pesos  Rate      Pesos  Rate       Pesos   Rate      Pesos
          ---- ----------- ---- ----------- ---- ------------- ---- -----------

Annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
Annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
Annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
Annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
Annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
Annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
Annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
Annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
CER plus
 annual
 fixed
 rate in
 $        4.00   4,117,360 4.00   4,180,504    -             -    -           -
Average
 annual
 variable
 rate in
 $           -           -    -           - 8.00    16,681,692 8.00  15,196,646
Annual
 fixed
 rate in
 US$         -           -    -           - 8.50     1,551,550 8.50   1,654,064
Average
 annual
 variable
 rate in
 US$         -           -    -           -    -             -    -           -
Average
 annual
 fixed
 rate in
 US$         -           -    -           -    -             -    -           -
Average
 annual
 variable
 rate in
 US$      2.49 602,303,871 4.62 449,593,066 4.50         7,144 4.50      14,286
Annual
 fixed
 rate in
 $ plus
 CER      5.83   5,267,325 5.83   5,592,766    -                  -           -
Non-
 interest
 bearing         1,424,083        1,260,987    - 1,043,473,363      632,815,947
               -----------      -----------      -------------      -----------

Total          613,112,639      460,627,323      1,061,713,749      649,680,943
               ===========      ===========      =============      ===========

                       Payables                                        Loans
         ------------------------------------- -----------------------------------------------------
                 03/31/2008         12/31/2007                 03/31/2008                 12/31/2007
         ------------------ ------------------ -------------------------- --------------------------
         Rate       Pesos   Rate       Pesos     Rate            Pesos      Rate             Pesos
         ---- ------------- ---- ------------- -------- ----------------- -------- -----------------

Annual
 fixed
 rate in
 US$        -             -    -             -    7.125       316,800,000    7.125       314,900,000
Annual
 fixed
 rate in
 US$        -             -    -             -     5.45         1,899,121     5.45         1,887,731
Annual
 fixed
 rate in
 US$        -             -    -             -     6.18            64,586     6.18            64,199
Annual
 fixed
 rate in
 US$        -             -    -             -     7.56       264,005,280     7.56       279,914,610
Annual
 fixed
 rate in
 US$        -             -    -             -     6.97       320,760,000     6.97       354,262,500
Annual
 fixed
 rate in
 US$        -             -    -             - 5.66 (2)        47,520,000 5.66 (2)        47,235,000
Annual
 fixed
 rate in
 US$        -             -    -             -     8.00        31,680,000     8.00        31,490,000
Annual
 fixed
 rate in
 US$        -             -    -             -     7.75       792,000,000     7.75       787,250,000
CER plus
 annual
 fixed
 rate in
 $          -             -    -             -        -                 -        -                 -
Average
 annual
 variable
 rate in
 $          -             -    -             -     7.92       208,947,464     9.83       263,824,044
Annual
 fixed
 rate in
 US$        -             -    -             -        - *                        -                 -
Average
 annual
 variable
 rate in
 US$        -             -    -             -     6.71     1,764,077,828     7.14     1,267,752,666
Average
 annual
 fixed
 rate in
 US$        -             -    -             -     5.53       459,360,000     5.76       305,453,000
Average
 annual
 variable
 rate in
 US$        -             -    -             -        -                 -                          -
Annual
 fixed
 rate in
 $ plus
 CER        -             -    -             -        -                 -                          -
Non-
 interest
 bearing      1,724,898,104      1,626,273,492                          -                          -
              -------------      -------------          -----------------          -----------------

Total         1,724,898,104      1,626,273,492          4,207,114,279 (1)          3,654,033,750 (1)
              =============      =============          =================          =================

(1) It only includes principal at face value.

(2) Plus additional interest calculated in relation to the economic performance
of Pan American Energy LLC.

EXHIBIT I

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

Balance sheet as of March 31, 2008 and December 31, 2007

PARTICIPATION IN JOINT VENTURES (in pesos)


                Lindero     Lindero     Aguada      Aguada        San         San                              Estancia
                                                                                                                 La
              Atravesado  Atravesado    Pichana     Pichana      Roque       Roque     Acambuco    Acambuco    Escondida
                62.50%      62.50%      18.18%      18.18%      16.47 %     16.47 %     52.00 %     52.00 %     25.00%
Balance sheet 03/31/2008  12/31/2007  03/31/2008  12/31/2007  03/31/2008  12/31/2007  03/31/2008  12/31/2007  03/31/2008
------------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------


ASSETS
-------------
CURRENT
 ASSETS
-------------
Cash on hand
 and in banks   3,118,707       6,737     173,235     162,872     176,500      21,005   7,548,315     115,536    108,816
Other
 receivables    1,541,136   1,022,484  11,454,674   9,917,410   5,119,016   5,035,286     495,623     611,434    639,188
Inventories     7,977,370   6,518,514   9,732,471   9,565,286   8,087,882   9,049,887   2,822,346   2,697,006     73,848
              ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

Total current
 assets        12,637,213   7,547,735  21,360,380  19,645,568  13,383,398  14,106,178  10,866,284   3,423,976    821,852
              ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

NON CURRENT
 ASSETS
-------------
Property,
 plant and
 equipment    135,323,039 132,339,618 254,155,748 253,948,755 194,008,689 189,303,216 690,201,917 673,640,204  5,796,078
Intangible
 assets                 -           -           -           -           -           -           -           -          -
              ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

Total non
 current
 assets       135,323,039 132,339,618 254,155,748 253,948,755 194,008,689 189,303,216 690,201,917 673,640,204  5,796,078
              ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

Total assets  147,960,252 139,887,353 275,516,128 273,594,323 207,392,087 203,409,394 701,068,201 677,064,180  6,617,930
              =========== =========== =========== =========== =========== =========== =========== =========== ==========

                                                        Costa      Costa      Costa      Costa
                                                        Afuera     Afuera     Afuera     Afuera
                      Estancia                        Argentina  Argentina  Argentina  Argentina  Anticlinal Anticlinal
                        La
                      Escondida Bandurria  Bandurria  Bloque 40  Bloque 40  Bloque 46  Bloque 46    Funes      Funes
                       25.00%     18.18%     18.18%     50.00%     50.00%     50.00%     50.00%     80.00%     80.00%
Balance sheet        12/31/2007 03/31/2008 12/31/2007 03/31/2008 12/31/2007 03/31/2008 12/31/2007 03/31/2008 12/31/2007
-------------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------


ASSETS
--------------------
CURRENT ASSETS
--------------------
Cash on hand and in
 banks                   28,033     70,932     68,531          -          -          -          -          -          -
Other receivables     1,171,815      8,948      8,948     63,424     63,424     29,265     29,265    984,428    911,323
Inventories              80,115          -          -          -          -          -          -          -          -
                     ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Total current assets  1,279,963     79,880     77,479     63,424     63,424     29,265     29,265    984,428    911,323
                     ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

NON CURRENT ASSETS
--------------------
Property, plant and
 equipment            5,587,925  2,117,425  2,117,425 13,835,541 13,835,541  1,113,741  1,113,741  3,404,654  3,820,656
Intangible assets         2,628          -          -          -          -          -          -          -          -
                     ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Total non current
 assets               5,590,553  2,117,425  2,117,425 13,835,541 13,835,541  1,113,741  1,113,741  3,404,654  3,820,656
                     ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Total assets          6,870,516  2,197,305  2,194,904 13,898,965 13,898,965  1,143,006  1,143,006  4,389,082  4,731,979
                     ========== ========== ========== ========== ========== ========== ========== ========== ==========

EXHIBIT I

(Cont.)

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

Balance sheet as of March 31, 2008 and December 31, 2007

PARTICIPATION IN JOINT VENTURES (in pesos)


               Lindero     Lindero     Aguada      Aguada        San         San                              Estancia
                                                                                                                La
              Atravesado Atravesado    Pichana     Pichana      Roque       Roque     Acambuco    Acambuco    Escondida
                62.50%     62.50%      18.18%      18.18%      16.47%      16.47%      52.00%      52.00%      25.00%
Balance
 sheet        03/31/2008 12/31/2007  03/31/2008  12/31/2007  03/31/2008  12/31/2007  03/31/2008  12/31/2007  03/31/2008
------------  ---------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

LIABILITIES
------------
CURRENT
 LIABILITIES
------------
Accounts
 payable                  3,747,969  42,329,714  44,692,923  18,733,880  14,300,600  25,615,451  31,815,503   515,148
Payroll and
 social
 security
 contributions             754,526        -           -           -           -        388,601     659,944       -
Taxes payable              123,464     22,379        215       23,150         -        789,351     275,367    117,869
                         ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

Total current
 liabilities              4,625,959  42,352,093  44,693,138  18,757,030  14,300,600  26,793,403  32,750,814   633,017
                         ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

NON CURRENT
 LIABILITIES
--------------
Accounts
 payable                  3,261,912    219,132     219,132     876,528     876,528    1,826,656   1,741,273      -
Provision for
 environmental
 remediation             10,608,086   6,532,250   6,401,074   9,055,980   8,873,866   3,530,638   3,459,737    85,351
Accruals                  6,147,461    75,636      76,201      363,252     436,293    2,552,318   2,458,378      -
                         ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

Total non
 current
 liabilities             20,017,459   6,827,018   6,696,407  10,295,760  10,186,687   7,909,612   7,659,388    85,351
                         ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

Total
 liabilities             24,643,418  49,179,111  51,389,545  29,052,790  24,487,287  34,703,015  40,410,202   718,368
                         ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

Owner's equity           115,243,935 226,337,017 222,204,778 178,339,297 178,922,107 666,365,186 636,653,978 5,899,562
                         ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------

Total                    139,887,353 275,516,128 273,594,323 207,392,087 203,409,394 701,068,201 677,064,180 6,617,930
                         =========== =========== =========== =========== =========== =========== =========== ==========

                                                 Costa      Costa      Costa      Costa
                                                 Afuera     Afuera     Afuera     Afuera
               Estancia                        Argentina  Argentina  Argentina  Argentina  Anticlinal Anticlinal
                 La
               Escondida Bandurria  Bandurria  Bloque 40  Bloque 40  Bloque 46  Bloque 46    Funes      Funes
                25.00%     18.18%     18.18%     50.00%     50.00%     50.00%     50.00%     80.00%     80.00%
Balance
 sheet        12/31/2007 03/31/2008 12/31/2007 03/31/2008 12/31/2007 03/31/2008 12/31/2007 03/31/2008 12/31/2007
------------  ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

LIABILITIES
------------
CURRENT
 LIABILITIES
------------
Accounts
 payable      1,201,226   590,492    509,626       -          -          -          -      1,911,993  1,078,756
Payroll and
 social
 security
 contributions    -          -          -          -          -          -          -        6,953      6,711
Taxes payable  111,921     8,499      6,793        -          -          -          -        9,452      2,654
              ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Total current
 liabilities  1,313,147   598,991    516,419       -          -          -          -      1,928,398  1,088,121
              ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

NON CURRENT
 LIABILITIES
--------------
Accounts
 payable          -                                           -                                -          -
Provision for
 environmental
 remediation    83,641       -          -          -          -          -          -       562,768    551,850
Accruals          -          -          -          -          -          -          -          -          -
              ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Total non
 current
 liabilities    83,641       -          -          -          -          -          -       562,768    551,850
              ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Total
 liabilities  1,396,788   598,991    516,419       -          -          -          -      2,491,166  1,639,971
              ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Owner's equity5,473,728  1,598,314  1,678,485  13,898,965 13,898,965 1,143,006  1,143,006  1,897,916  3,092,008
              ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Total         6,870,516  2,197,305  2,194,904  13,898,965 13,898,965 1,143,006  1,143,006  4,389,082  4,731,979
              ========== ========== ========== ========== ========== ========== ========== ========== ==========

EXHIBIT I

(Cont.)

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

Statement of income for the three-month period beginning January 1 and ended
March 31, 2008, comparative with the same period of the prior year

PARTICIPATION IN JOINT VENTURES (in pesos)


                  Lindero      Lindero       Aguada       Aguada        San          San
                 Atravesado   Atravesado    Pichana      Pichana       Roque        Roque       Acambuco     Acambuco
                      62.50%       62.50%       18.18%       18.18%       16.47%       16.47%       52.00%       52.00%
                        2008         2007         2008         2007         2008         2007         2008         2007
                ------------ ------------ ------------ ------------ ------------ ------------ ------------ ------------
                 (3 months)  (3 months)   (3 months)   (3 months)   (3 months)   (3 months)   (3 months)   (3 months)
STATEMENT OF INCOME
----------------------------
Sales (1)                  -            -            -            -            -            -            -            -
Cost of
sales           (14,878,876) (11,129,174) (41,814,557) (28,292,548) (23,324,306) (12,797,274) (43,871,195) (33,286,758)
                ------------ ------------ ------------ ------------ ------------ ------------ ------------ ------------

Gross result    (14,878,876) (11,129,174) (41,814,557) (28,292,548) (23,324,306) (12,797,274) (43,871,195) (33,286,758)
Adminis-
trative expenses           -            -            -            -            -            -            -            -
                ------------ ------------ ------------ ------------ ------------ ------------ ------------ ------------
Operating result(14,878,876) (11,129,174) (41,814,557) (28,292,548) (23,324,306) (12,797,274) (43,871,195) (33,286,758)

Financial
 results
- net             ( 123,722)   ( 120,487)    ( 92,004)    ( 54,238)   ( 127,731)   ( 103,617)    ( 14,335)    ( 18,756)
Other income
and
expenses -
net               ( 204,856)      446,567       43,895       18,883       30,038       18,521      210,280      297,088
                ------------ ------------ ------------ ------------ ------------ ------------ ------------ ------------

Net results     (15,207,454) (10,803,094) (41,862,666) (28,327,903) (23,421,999) (12,882,370) (43,675,250) (33,008,426)
                ============ ============ ============ ============ ============ ============ ============ ============

                                                          Costa     Costa     Costa     Costa
                                                           Afuera    Afuera    Afuera    Afuera
              Estancia   Estancia                        Argentina Argentina Argentina Argentina Anticlinal  Anticlinal
                La         La
              Escondida  Escondida Bandurria  Bandurria  Bloque 40 Bloque 46 Bloque 46 Bloque 46    Funes       Funes
                 25.00%     25.00%    18.18%     18.18%%    50.00%    35.00%    50.00%    35.00%      80.00%      80.00%
                   2008       2007      2008        2007      2008      2007      2008      2007        2008        2007
            ----------- ---------- --------- ----------- --------- --------- --------- --------- ----------- -----------
             (3 months) (3 months) (3        (3 months)  (3        (3        (3        (3        (3 months)  (3 months)
                                    months)               months)   months)   months)   months)
STATEMENT OF INCOME
----------------------
Sales (1)             -          -         -           -         -         -         -         -           -           -
Cost of
sales         (951,900)  (780,449)         -           -         -         -         -         - (3,243,947) (2,551,936)
            ----------- ---------- --------- ----------- --------- --------- --------- --------- ----------- -----------

Gross result  (951,900)  (780,449)         -           -         -         -         -         - (3,243,947) (2,551,936)
Adminis-
trative
 expenses             -          -         -           -         -         -         -         -           -           -
            ----------- ---------- --------- ----------- --------- --------- --------- --------- ----------- -----------
Operating
 result       (951,900)  (780,449)         -           -         -         -         -         - (3,243,947) (2,551,936)

Financial
 results
- net            ( 478)     ( 988)       566    ( 1,205)         -         -         -         -   ( 42,487)    ( 6,456)
Other income
and
expenses -
net                   -          - (296,979) (2,646,587) (281,362)   852,941 (239,478)   239,893           -           -
            ----------- ---------- --------- ----------- --------- --------- --------- --------- ----------- -----------

Net results   (952,378)  (781,437) (296,413) (2,647,792) (281,362)   852,941 (239,478)   239,893 (3,286,434) (2,558,392)
            =========== ========== ========= =========== ========= ========= ========= ========= =========== ===========

(1) No sales were recorded in the joint ventures because production is directly
assigned to each participant.

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

FINANCIAL STATEMENTS as of March 31, 2008

REPORTING SUMMARY REQUIRED BY RESOLUTION No. 290/97 OF THE NATIONAL SECURITIES
COMMISSION

1. Comment on the Branch's activity

1.1. Operating activities

Pan American Energy LLC (Argentine Branch) is mainly engaged in the exploration,
development and production of hydrocarbons. The Head Office of the Branch is Pan
American Energy LLC, which also has various subsidiaries and affiliates that
carry out activities in Argentina and other Mercosur countries. BP and Bridas
Corporation hold interests that account for 60% and 40%, respectively of the
Branch's ownership.

During the first quarter of 2008, with a daily average production of 225.3
thousand barrels of oil, the Branch together with subsidiaries of Head Office
that develop their activities in the country rank second in the production of
natural gas and oil in Argentina.

1.2. Issuance of bonds

On February 11, 1997, Amoco Argentina Oil Company (Argentine Branch) issued the
Second Series of bonds in the amount of US$ 100,000,000 due in ten years at a
rate of 6.75%. The bonds were paid upon maturity on February 1, 2007. Such
issuance was made under a short and medium term bond program in the amount of
US$ 200,000,000, authorized by Resolution No. 10982 issued by the CNV on July
13, 1995.

As a result of the transfer of assets and liabilities referred to in the second
paragraph of note 1 to these financial statements, Amoco Argentina Oil Company
(Argentine Branch) transferred the above mentioned bonds to Pan American Energy
LLC (Argentine Branch). Such bonds were guaranteed by BP Company North America
Inc. until repayment in February 2007.

On February 21, 2002, through Resolution No. 14123, the CNV authorized the
Global Program for the Issuance of Bonds of Pan American Energy LLC (Argentine
Branch) (the "Global Program") in the total amount of US$ 1,000,000,000.

On October 27, 2004, the Branch issued Bonds Class 3 in the amount of
US$ 100,000,000 under the Global Program. The bonds become due in five years
(October 27, 2009) with a 7.125% annual fixed interest rate to be paid on a
half-yearly basis. The price of the issuance was 99.483% of the nominal value.
The funds derived from this issuance were allocated to investments in property,
plant and equipment and repayment of loans.

On August 9, 2006, the Branch issued Bonds Class 4 in the amount of
US$ 250,000,000 under the Global Program, to be repaid in two equal installments
becoming due on February 9, 2011 and February 9, 2012, with interest accruing at
an annual fixed interest rate of 7.75% to be paid on a half-yearly basis. The
price of the issuance was 100.00% of the nominal value. The funds obtained from
this issue were allocated to investments in property, plant and equipment and
repayment of loans.

Bonds Class 3 and Class 4 are guaranteed by Pan American Energy LLC.

1.3. Loan agreements

On July 11, 2005, the Branch obtained from the International Finance Corporation
(IFC) a loan in the amount of US$ 250,000,000 guaranteed by Pan American Energy
LLC and consisting of three tranches:

- "A" in the amount of US$ 100,000,000 with interest accruing at an annual fixed
rate of 7.56%, through an interest rate swap with IFC, amortizable on a
six-month installments basis, and becoming due in July 2015,

- "B" in the amount of US$ 135,000,000, at an annual fixed rate of 6.97%,
through an interest rate swap with IFC, amortizable on a six-month installments
basis, and becoming due in July 2012, and

- "C" in the amount of US$ 15,000,000, at an annual fixed base rate of 5.66%
plus additional interest calculated in relation to Pan American Energy LLC�s
economic performance, becoming due in July 2016.

The first repayment of principal for tranches "A" and "B" was made on January
15, 2007.

The funds obtained were used to partially fund the 2005 investment program in
San Jorge Gulf.

On July 13, 2007, the Branch obtained from the International Finance Corporation
(IFC) a loan in the amount of US$ 550,000,000, consisting of two tranches which
accrue interest at a variable rate:

- "A" in the amount of US$ 150,000,000, amortizable on a six-month installments
basis and becoming due in April 2018; and

- "B" Sub-tranch "1" in the amount of US$ 158,500,000, amortizable on a
six-month installments basis and becoming due in April 2014, and "B-2" in the
amount of US$ 241,500,000, amortizable on a six-month installments basis and
becoming due in April 2015.

The loan is guaranteed by Pan American Energy LLC and the funds obtained are
being applied to partially fund the investment program that the Company will
undertake in the Cerro Drag�n area, in the San Jorge Gulf basin, located in the
provinces of Santa Cruz and Chubut.

As of December 31, 2007, the amount of US$ 400,000,000 of such loan had been
disbursed and in January 2008, the remaining amount of US$ 150,000,000 was
disbursed.

2. Balance sheet items as of March 31, 2008(in pesos)

                                    Balance       Balance        Balance
      Balance        Balance

                                    sheet         sheet          sheet
        sheet          sheet

                                    as of         as of          as of
        as of          as of

                                    03/31/2008    03/31/2007     03/31/2006   
03/31/2005     03/31/2004

Current assets           1,878,053,939   1,492,662,570   1,326,318,306     742,909,657     382,351,028

Non current assets       7,873,222,768   6,169,807,720   5,076,854,853   4,391,455,874   4,019,654,314
                       --------------- --------------- --------------- --------------- ---------------

Total                    9,751,276,707   7,662,470,290   6,403,173,159   5,134,365,531   4,402,005,342
                       =============== =============== =============== =============== ===============

Current liabilities      1,956,000,052   2,647,403,167   1,803,904,364   1,414,276,014   1,222,640,937

Non current
 liabilities             4,075,682,957   2,559,598,063   1,839,876,359   1,317,731,414   1,523,204,123
                       --------------- --------------- --------------- --------------- ---------------

Subtotal                 6,031,683,009   5,207,001,230   3,643,780,723   2,732,007,428   2,745,845,060
Account with Head
 Office                  3,258,354,691   1,994,230,053   2,298,153,429   1,941,119,096   1,216,700,282

Capital allocated to
 the Branch                221,779,007     221,779,007     221,779,007     221,779,007     200,000,000

Capital adjustment          39,460,000     239,460,000     239,460,000     239,460,000     239,460,000
                       --------------- --------------- --------------- --------------- ---------------

Total                    9,751,276,707   7,662,470,290   6,403,173,159   5,134,365,531   4,402,005,342
                       =============== =============== =============== =============== ===============

3. Income statement items as of March 31, 2008 (in pesos)

                                  Three-month   Three-month    Three-month
   Three-month    Three-month

                                  period ended   period ended   period ended
 period ended   period ended

                                  03/31/2008     03/31/2007     03/31/2006    
03/31/2005     03/31/2004

Ordinary operating income    701,141,054    626,183,792    791,067,389   414,146,484    304,287,339

Financial results           ( 92,817,301)  ( 78,310,627)  ( 32,504,397)   10,980,813    48,701,182

Other income and expenses -
 net                         ( 2,065,569)   ( 1,977,433)  ( 60,087,391)  ( 5,393,877)  ( 5,397,090)
                            -------------- -------------- ------------- -------------- -------------

Income before taxes          606,258,184    545,895,732    698,475,601   419,733,420    347,591,431

Income tax current          (212,349,112)  (204,821,539)  (258,498,724) (141,343,582)  (111,520,511)

Deferred tax                 ( 5,177,255)    18,218,711     9,903,722    ( 6,435,344)  ( 19,319,285)
                            -------------- -------------- ------------- -------------- -------------

Net income                   388,731,817    359,292,904    449,880,599   271,954,494    216,751,635
                            ============== ============== ============= ============== =============

4. Statistical data

                       Three-month     Three-month     Three-month     Three-month     Three-month
                       period ended    period ended    period ended    period ended    period ended
                        03/31/2008      03/31/2007      03/31/2006      03/31/2005      03/31/2004
                      --------------  --------------  --------------  --------------  --------------
                        In cubic        In cubic        In cubic        In cubic        In cubic
                          meters          meters          meters          meters          meters
                      --------------  -------------   --------------  --------------  --------------
Production of crude
 oil                    1,542,244       1,520,676       1,463,758       1,437,511       1,374,910
Sale of crude oil       1,446,579       1,608,722       1,664,392       1,576,430       1,343,936
                       In thousand    In thousand      In thousand     In thousand     In thousand
                       cubic meters    cubic meters    cubic meters    cubic meters    cubic meters
                      --------------  -------------   --------------  --------------  --------------
Production of natural
 gas                    1,383,936       1,202,589       1,143,951        993,695         975,991
Sale of natural gas     1,406,037       1,256,209       1,113,939       1,015,515        883,738
Transportation of
 natural gas                -             2,756           78,530          95,843          77,088

                         In tons         In tons        In tons         In tons         In tons
                      --------------  -------------  --------------  --------------  --------------

Production of L.P.G.      24,707         20,613          21,969          13,410          13,603
Sale of L.P.G.            24,179         31,629          30,010            27            18,780

5. Indexes

                         Financial       Financial       Financial       Financial       Financial
                        statements as   statements as   statements as   statements as   statements as
                             of              of              of              of              of
                         03/31/2008      03/31/2007      03/31/2006      03/31/2005      03/31/2004
                       --------------  --------------  --------------  --------------  --------------

Liquidity                   0.96            0.56            0.74            0.53            0.31
Indebtedness                1.62            2.12            1.32            1.14            1.66
Tied -up funds              0.81            0.81            0.79            0.86            0.91
Solvency                    0.62            0.47            0.76            0.88            0.60

6. Business prospects

Pan American Energy LLC (Argentine Branch) is working to maintain and increase
its operating efficiency in connection with the oil and gas exploration and
production, to continue increasing its share in hydrocarbon production in
Argentina, satisfying in this way the needs derived from a sustained growth rate
of the country's economy as well as to comply with its existing contractual
obligations. The Branch strives to provide its personnel and contractors with
healthy and safe working conditions while preserving the environment.

The Branch is strongly engaged with the concerns and challenges posed by the
communities where it operates, by developing different social responsibility
programs (CSR).

During the first quarter of 2008, the Branch's oil production grew by 1.4% and
natural gas production rose by 15.0% with respect to the same period of the
prior fiscal year. This growth results from the active investment program
successfully implemented by Pan American Energy in the last years, which has
allowed it to double hydrocarbon production from 1999 to 2006.

After the 2002 crisis, the country has managed to achieve high gross domestic
product (GDP) growth with relatively low inflation rates though growing recently
and, a stable currency, with unemployment rates that have been significantly
reduced.

In the first quarter of 2008, the GDP grew by 8.7% compared with the same period
of the prior fiscal year, which indicates that a growing trend - initiated 24
quarters ago - continues. It is estimated that the gross domestic product will
increase by 6.9% in 2008. The unemployment rate is about 7.5%.

In the first quarter of 2008, the fiscal surplus totaled 8,844 million pesos,
thus disclosing a 73.9% increase compared to the same period of the prior fiscal
year. The level of foreign indebtedness as of December 31, 2007 increased with
respect to the same date of the prior fiscal year and amounted to US$ 144,729
million. The country's international reserves amounted US$ 50,464 million as of
March 31, 2008, 36.9% higher than those for the prior fiscal year.

The increase in the oil industry costs is a source of concern, since it clearly
exceeds the general increase in prices.

As previously informed, revenues from the exploration and production of oil and
gas were affected by the amendments to the regulations in force. In the case of
oil, as from March 2002, an increasing rate of export tariffs on exports has
been applied, which has also affected the sales prices in the domestic market.
On November 15, 2007, the Ministry of Economy and Production of Argentina issued
Resolution 394/07 by which export tariffs on oil and by products exports were
significantly increased for sales of oil above US$ 60.9 / barrel. The results of
the first quarter reflect the impact of this increase.

In the case of natural gas, in January 2002, the wellhead price of natural gas
was redenominated into pesos and frozen and, afterwards, export tariffs on
exports and quantitative restrictions to them were established. In April 2004,
the Secretary of Energy and the natural gas producers signed an agreement named
"regularization of wellhead prices". This agreement had a term that had expired
on December 31, 2006, after which, and at the request of the related
authorities, a new agreement was signed that will be in force until December 31,
2011.

The new agreement, approved last June by Resolution 599/07 of the Secretary of
Energy, compels producers (including the Branch) to satisfy the domestic demand
up to the levels reached in 2006 plus the growth of the residential market
during the validity thereof by setting out new guidelines for price changes.

In relation to export tariffs on gas exports, on July 25, 2006, the Ministry of
Economy and Production of Argentina, through Resolution No. 534/2006, increased
them to 45% of the price established under the form contract entered into
between Argentina and Bolivia (for the first quarter of 2008, export tariffs
amounted to US$ 3.14 per million BTU). On March 10, 2008, the Ministry of
Economy and Production of Argentina, through Resolution No. 127/2008 amended the
referred resolution and established that export tariffs would be equal to 100%
of the highest import price of natural gas into Argentina at any time (export
tariffs currently amount to US$ 7.80 per million BTU).

In the first quarter of 2008, the various unions gathering workers who perform
tasks in the oil fields operated by the Branch made several claims for salary
increases, reclassifications, labor continuity (for UOCRA personnel) and other
labor benefits. Such claims were peacefully made and, as a result, no action
measures affecting operations in general were taken. Claims were limited to
certain companies and did not prevent the other workers from working under
normal conditions, except for two days where, as a result of the action measures
taken, the contractors could not be taken to the oil field. In the second
quarter, the negotiation of the collective bargaining agreements of the Private
Oil Workers Union and Hierarchy Employees Union began. It is worth mentioning
that, since May 2, the production in the Piedra Clavada and Koluel Kaike blocks
has come to a standstill due to union conflicts.

During the first quarter of 2008, the Branch has continued with its investment
plans with a view to expanding its business and contributing to satisfying the
growing energy demand. The commitments assumed referred to in the following
paragraphs strengthen these expansion plans.

On December 6, 2006, Law No. 26197, known as "Hydrocarbons Short Law", was
passed. This law complied with the constitutional provision of transferring the
original ownership of the natural resources contained in the subsurface from the
Federal State to the producing provinces where oil fields are located.

Within this framework, the Branch entered into with the Argentine provinces of
Chubut (04/27/2007) and Santa Cruz (06/25/2007) two investment commitments and
agreements for the extension of the term of the concession for hydrocarbon
exploitation for a ten-year period in the blocks known as Cerro Drag�n, the area
of which is extended in the territory of both provinces, and Piedra Clavada and
Koluel Kaike in the province of Santa Cruz. The agreements expired between 2016
and 2017.

These agreements provided for, among other obligations, minimum investments of
US$2,000,000,000 in the Province of Chubut and of US$ 500,000,000 in the
Province of Santa Cruz to be made before 2017.

Furthermore, in order to enter into the operation agreements mentioned below,
other investments of US$ 1,000,000,000 in the Province of Chubut and US$
300,000,000 in the Province of Santa Cruz are to be made before 2027.

The agreements also provided for a US$ 80,000,000 investment commitment for
off-shore exploration, at the Branch's own risk, by means of two joint ventures
(UTEs) with the state-run companies Petrominera (in the case of Chubut) and
Fomicruz (in the case of Santa Cruz). If the Branch makes commercial
discoveries, an additional investment commitment will be required in the amount
of US$ 500,000,000 for the development of the offshore fields to be discovered.

The creation of the UTEs referred to in the preceding paragraph is consistent
with the provisions of sections 11 and 95 of the Hydrocarbon Law, which allows
state-owned companies to enter into agreements and create companies,
partnerships or other associations with individuals or entities for the
development of their activities.

The operation agreements executed with state-owned companies also fall within
the scope of the referred Law, which shall be effected as from the year 2027,
subject to compliance with the investments and Pan American Energy's exploration
success, so that it is allowed to evidence that it has developed sufficient
reserves to continue with the production of the fields of those areas as from
that year.

Based on these agreements, during the remaining term of the concessions, the
Branch agreed to pay to the respective provinces an additional amount of 3% of
the net revenues for certain items described in the agreements. The Branch will
also provide money for the development of infrastructure and the economic
diversification of the provinces of Chubut and Santa Cruz. A number of grants
will be awarded, loans given or guaranteed, job opportunities offered and
supplementary actions performed by the Branch as well.

The agreement with the province of Chubut was ratified by provincial law No.
5616 passed by the Provincial Congress on May 24, 2007, enacted by decree No.
500/2007 and published in the Official Bulletin on May 28, 2007.

The agreement with the province of Santa Cruz was ratified by provincial law No.
3009 issued by the Provincial Congress on March 13, 2008, enacted by decree No.
545/2008 and published in the Official Bulletin on March 27, 2008.

The execution of these agreements proposes a new horizon to sustain the increase
in production and reserves maintained by Pan American Energy in the Golfo San
Jorge basin. This new horizon and other regulatory and market conditions will
allow addressing long-term projects requiring sound investments, new
technologies and teams working for the future.

On January 28, 2008, Pan American Energy communicated that, as a result of its
ongoing exploration works in the Cerro Drag�n Area of the Province of Chubut, it
had made new findings of oil and natural gas reserves in the Northern and
Central regions of the Area, which, as a whole, account for one hundred million
equivalent oil barrels (boe).

Buenos Aires, May 9, 2008

                                               Daniel Grinstein
                                               Attorney-in-fact

PAN AMERICAN ENERGY LLC (ARGENTINE BRANCH)

FINANCIAL STATEMENTS as of March 31, 2008

SUPPLEMENTARY INFORMATION TO THE FINANCIAL STATEMENTS AS OF MARCH 31, 2008
REQUIRED BY SECTION 68 OF THE REGULATIONS OF THE BUENOS AIRES STOCK EXCHANGE

Overall issues about the Branch's activity:

1. Specific and significant legal requirements which imply contingent
suspensions or changes of benefits provided for by such regulations:

The Branch is not subject to specific and significant legal requirements, which
may imply the contingent suspension or change of benefits provided for by such
regulations, except as disclosed in notes to the financial statements.

2. Significant changes in the Branch's activities or other similar circumstances
that affect the comparison of the financial statements with prior years, or with
those to be presented in future years.

There are no changes in the Branch's activities that significantly affect the
comparison of the financial statements as of March 31, 2008.

3. Breakdown of receivables and payables as per section 68, subsection 3.

3.a) The breakdown of receivables and payables based on the maturity thereof is
disclosed in Exhibit H to the financial statements.

The following receivables without any established term included in the referred
Exhibit H are due:

                                                         Current receivables
                                                                  $
                                                        ----------------------

   Due from January to March 2008                                   11,254,173
   Due from October to December 2007                                 7,463,720
   Due from July to September 2007                                  17,379,968
   Due from April to June 2007                                       9,819,739
   Due from April 2006 to March 2007                                 1,310,867
   Due from April 2005 to March 2006                                 9,520,137
   Due from April 2004 to March 2005                                   455,619
   Due from April 2003 to March 2004                                   493,151
   Due from April 2002 to March 2001                                   950,962
   Due from April 2001 to March 2002                                   176,367
   Due from April 2000 to March 2001                                    83,700
                                                        ----------------------

               Total                                                58,908,403
                                                        ======================

There are no overdue payables.

3.b) In connection with the receivables and payables in foreign currency, see
Exhibit F to the financial statements. There are no significant receivables and
payables represented by securities.

3.c) There are no receivables and payables subject to adjustment clauses.

3.d) In connection with the receivables and payables that accrue interest as of
March 31, 2008, see Exhibit H to the financial statements.

4. Corporations Art. 33 Law 19550

None.

5. Receivables or loans with directors, statutory auditors, and relatives
including up to the second degree:

None as of the date of issuance of these financial statements.

6. Physical counts of inventories

Based on the nature of the activity, the Branch carries out physical counts of
most of its inventories. There are no significant slow-moving inventories as of
March 31, 2008 for which an allowance has not been set up.

7. Current values

The valuation method of inventories is disclosed in Note 3.2.d) to the financial
statements.

8. Property, plant and equipment

No items of property, plant and equipment have been subject to appraisal.

To date, there are no property, plant and equipment items that are not in use
due to obsolescence.

9. Interests in other companies

None. The Branch's participating interests in joint operations and other
entities are disclosed in Note 2 to the financial statements.

10. Recoverable value

The recoverable value of inventories and fixed assets, used as a limit to their
valuation for financial reporting purposes, have been determined based on the
net realizable values and values in use, the latter defined as the expected net
cash flows that would result from both the use of the assets and the disposal
thereof at the end of their useful life.

11. Insurance

As of March 31, 2008, the insurance taken on the Branch's assets are as follows:


                     Insured assets                            Insured risk              Covered amount


-------------------------------------------------------- ------------------------- --------------------------
                                                                                          Thousand US$

   Equipment, facilities and pipelines
     applied to exploitation and transportation          Physical damage                              702,815

   Equipment, facilities and pipelines
     applied to exploitation and transportation          Liability insurance                           10,000

   Wells                                                 Control, re-drilling,
                                                          spill                                        72,037

Additionally, the Branch has taken the following policies: workers compensation
insurance, directors and officers' liability insurance and automobile liability
insurance.

12. Negative and positive contingencies

To calculate the related accruals, all available elements of judgment and
probability of occurrence have been considered (see Notes 10, 13 and Exhibit D
to the basic financial statements).

13. Contingent events as of the date of issuance of the financial statements
with moderate likelihood of occurrence, the financial effects of which have not
been fully recorded as of March 31, 2008.

None.

Irrevocable advances for future subscriptions

14. As of March 31, 2008 there are no irrevocable advances for future
subscriptions.

15. There are no preferred shares as of the date of issuance of these financial
statements.

16. As of the date of issuance of these financial statements, the Branch has no
restrictions on the distributions of earnings, except as indicated in Note 10.


Buenos Aires, May 7, 2008

                                                    Daniel Grinstein
                                                    Attorney-in-fact


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