DOR Doriemus

 
TIDMDOR 
 
6 October 2014 
 
                                 Doriemus plc 
 
                         ("Doriemus" or "the Company") 
 
                 Drilling Update, Horse Hill-1, Weald Basin UK 
 
Doriemus plc (AIM: DOR) advises that the Horse Hill-1 well has intersected the 
Portland Sandstone over the weekend and has encountered oil shows identified by 
mud logging from 2,100 feet to 2,140 feet measured depth ("MD"). At 14:00 hours 
yesterday, the well was drilling ahead at 3,030 feet MD towards the other 
primary and secondary targets. 
 
Sandstone drill cuttings recovered from the well have been analyzed and are 
confirmed by the operator to have "a dull yellow fluorescence with a slow 
diffuse light blue cut with a trace of residual oil ring". This indicates the 
presence of oil within a porous and permeable rock matrix. Gas readings within 
the mud over the same interval were also elevated and recorded gases 
compositions consistent with the presence of oil. 
 
The Horse Hill-1 well is located on the northern side of UK Weald Basin near 
Gatwick Airport and is planned to test a number of conventional oil and gas 
targets. The primary oil reservoir targets in this well lie in the Jurassic age 
Portland Sandstone and the Corallian Sandstone. There are also a number of 
secondary oil targets in the Jurassic formations, including the Great Oolite 
Limestone. The well is presently being drilled to the second of the primary 
targets in the Corallian Sandstone. 
 
Electric logs will be acquired on reaching the third casing point at 
approximately 5,900 feet MD before setting a 9 5/8-inch casing. The well will 
then be drilled with an 8 ½-inch hole will be drilled to 8,658 feet total depth 
("TD") in order to test for Triassic aged formations which are expected to 
contain gas. 
 
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: 
 
"Progress on this conventional well has so far been encouraging and we are 
pleased to report that oil shows have been encountered in the Portland 
Sandstones. The well will need to be electronically logged at the next casing 
point to understand the significance of these oil shows in the Portland and we 
look forward to reporting further drilling updates as the well progresses." 
 
Glossary: 
 
Fluorescence: The natural property of minerals and fluids to emit light, 
characteristic in certain situations, of the presence of hydrocarbons. 
 
Drill cuttings: Rock chips from the subsurface formations recovered by 
filtering the drilling mud. 
 
MD: measured depth. 
 
(Drilling) Mud: Drilling fluid used to clean and lubricate the drilling process 
and recover samples of the subsurface formation to surface. 
 
                                     -END- 
 
Enquiries: 
 
Doriemus plc 
 
Donald Strang/ Hamish Harris                 +44 (0) 20 7440 0640 
 
 
 
Cairn Financial Advisers LLP: 
 
James Caithie                                +44 (0) 20 7148 7900 
 
Public Relations: 
 
Square 1 Consulting Ltd                      +44 (0) 20 7929 5599 
 
David Bick/Mark Longson 
 
 
 
END 
 

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