DOR Doriemus

 
TIDMDOR 
 
16 October 2014 
 
                                 Doriemus plc 
 
                         ("Doriemus" or the "Company") 
 
                  Drilling Update, Horse Hill-1, Weald Basin UK 
 
Doriemus Plc (AIM: DOR) today advises that the Horse Hill-1 well has now been 
drilled to the third casing point at 6,612 feet measured depth ("MD"), and will 
now be electrically logged through the observed reservoir sections. Electronic 
logging and full interpretation of these logs is expected to take approximately 
one week. 
 
The depth of the third casing point was deepened from the previously announced 
5,900 feet to 6,612 feet MD due to a number of reservoir targets being 
identified slightly deeper and thicker than expected. 
 
On completion of the detailed logging, it is planned that a 9 5/8-inch casing 
will be set prior to drilling in an 8 ½-inch hole to a total depth ("TD") of 
approximately 8,680 feet MD in order to test for deeper Triassic aged 
formations where further electric logs will be acquired. 
 
As previously announced, oil shows from mud logging have been identified in the 
Portland Sandstones and additionally oil shows, mineral fluorescence and 
elevated gas readings of C1 through to C5 have been detected whilst drilling 
the well to the current depth. The significance of these hydrocarbon shows will 
only become clear following the analysis of the detailed down-hole electric 
logs. 
 
Doriemus owns a 10% direct interest in Horse Hill Developments Ltd ("HHDL"). 
 
HHDL is a special purpose company that owns a 65% participating interest and 
operatorship of onshore licences PEDL137 and the adjacent licence PEDL 246 in 
the UK Weald Basin. The participants in the Horse Hill-1 well are HHDL with a 
65% working interest and Magellan with a 35% interest. 
 
Donald Strang, the Company's Chairman, commented: 
 
"We await the results of the all-important electric logs from the Jurassic over 
the coming week. We also look forward to drilling the well to its TD to test 
the theory that hydrocarbons may be present in the Triassic." 
 
Competent Person's Statement: 
 
The technical information contained in this announcement has, for the purposes 
of the AIM Guidance Note for Mining, Oil and Gas companies has been reviewed 
and approved by Jonathan Tidswell-Pretorius, Executive director at HHDL and 
Chairman of Angus energy Ltd a UK registered onshore operator who has 15 years 
of relevant experience in the oil and gas industry. Mr. Tidswell-Pretorius is a 
member of the Society of Petroleum Engineers and United Kingdom Onshore Oil and 
Gas (UKOOG) industry bodies. 
 
 
Glossary: 
 
Fluorescence: The natural property of minerals and fluids to emit light, 
characteristic in certain situations, of the presence of hydrocarbons 
 
C1 to C5: Hydrocarbon gases from spectrometry showing the presence of C1 
(methane), C2 (ethane), C3 (propane), C4 (butane) and C5 (pentane) 
 
Oil shows: Indications of the presence of oil within a porous and permeable 
rock matrix 
 
Drill cuttings: Rock chips from the subsurface formations recovered by 
filtering the drilling mud 
 
MD: measured depth 
 
TD: total depth 
 
Mud logging: Analysis of rock and fluid samples recovered at surface from the 
drilling fluids (mud) 
 
Mud gas: Gases recovered from the drilling fluids (mud) 
 
(Drilling) Mud: Drilling fluid used to clean and lubricate the drilling process 
and recover samples of the sub-surface formations to surface 
 
 
Enquiries: 
 
Doriemus plc                            +44 (0) 20 7440 0640 
Donald Strang/Hamish Harris 
 
Cairn Financial Advisers LLP            +44 (0) 20 7148 7900 
Nominated Adviser and Broker 
James Caithie/Jo Turner/Carolyn Sansom 
 
 
 
END 
 

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