ber : 6718S
Doriemus PLC
21 March 2016
Doriemus PLC
("Doriemus" or the "Company")
Horse Hill-1 Oil Discovery, Weald Basin, UK
Aggregate Flow Rate Likely the Highest of any UK Onshore New Field Discovery Well
Doriemus (ISDX: DOR) announces that Horse Hill Developments Ltd has informed the Company that the final Horse Hill 1 ('HH-1') Portland test flowed at a stable dry oil rate of 323 barrels of oil per day ('bopd'), double the previously reported rate. The final total aggregate stable dry oil flow rate from two Kimmeridge limestones plus the overlying Portland sandstone stands at 1688 bopd. Over the 30-90 hour flow periods from each of the 3 zones, no clear indication of any reservoir pressure depletion was observed. Further analysis of data is ongoing and will be reported shortly.
Flow Test Highlights
· The final Portland test of 323 bopd, over an 8.5-hour, period is the highest stable dry oil flow rate from any onshore UK Portland well. On further testing, with a larger pump, the rate doubled from the previously reported stable dry oil rate of 168 bopd. The Portland was produced at maximum pump capacity and showed no clear indication of depletion. It is likely that the rate can be further increased using a higher capacity downhole pump during the next planned test.
· Proof that the Kimmeridge limestones contain significant volumes of moveable light oil that can be flowed to surface at commercial rates
· As previously reported, the stable, natural dry-oil flow rate of 464 bopd from the Lower Kimmeridge Limestone is the first ever flow from this rock unit in the Weald Basin and onshore UK
· Based on the analysis of published reports from all significant UK onshore discovery wells, the Company concludes that the well's 1688 bopd is likely the highest aggregate stable dry-oil flow from any onshore UK new field wildcat discovery well
· Based on the analysis of published reports from all significant UK onshore discovery wells, the Company concludes that the 901 bopd from the Upper Kimmeridge zone is likely the highest stable natural dry oil flow rate from a single reservoir in any UK onshore new field wildcat discovery well
· High quality Brent Crude produced: light, sweet oil (40 degrees API in Kimmeridge, 35-37 degrees API in Portland) 1,940 barrels delivered to the Esso Fawley refinery
· Preliminary analysis confirms that the Lower and Upper Kimmeridge Limestone units are naturally fractured reservoirs with high deliverability
· Strong possibility for further optimisation and increased flow rates from all 3 zones in future development and production wells, particularly through the use of horizontal wells
Summary Table of Test Results
Zone
Maximum Instantaneous Oil Rate
Stabilised Dry Oil Rate
Perforated Interval
Stabilised Flow Period
Depth Below Surface
bopd
bopd
ft
hours
ft
U. Portland *
360
323
103
8.5
2000
U. Kimmeridge **
1008
901
88
4.0
2800
L. Kimmeridge **
700
464
80
7.5
2950
Total
2068
1688
271
20
Note: * flow rate limited by pump stroke rate capacity ** natural flow
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