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Based on the analysis of published reports from all significant UK onshore discovery wells, the Company concludes that the well’s 1,688 bopd is likely to be the highest aggregate stable dry-oil flow from any onshore UK new field wildcat discovery well
Some additional information for this interested: 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
Another addition reference the Kimmeridge 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 the highest stable natural dry oil flow rate from a single reservoir in any UK onshore new field wildcat discovery well
Just a little reminder! The HH-1 Kimmeridge Limestone and Portland Sandstone oil discovery well is located on the northern side of the Weald Basin, 3km north of Gatwick Airport. Two naturally-fractured limestone members within the Kimmeridge section, known as KL3 and KL4, flowed dry, 40 degrees API oil, at an aggregate stabilised natural flow rate of 1,365 barrels per day ("bopd") with no clear indication of depletion. The overlying Portland Sandstone flowed dry, 35-degree API gravity oil at a stable pumped rate of 323 bopd. The Portland oil was produced at the rod-pump's maximum achievable rate and thus flow was constrained by the pump's mechanical capacity.
11.2.1 Horse Hill Kimmeridge (page 101) As well as the conventional Portland discovery, oil was flowed from two limestone members of the Upper Jurassic Kimmeridge Clay Formation, the KL3 and KL4. Figure 11.3 shows the top Kimmeridge Limestone depth map at Horse Hill. Horse Hill-1 (“HH-1”) penetrated a total Kimmeridge thickness of 1948 ft, of which, 511 ft has been interpreted as gross pay, which includes 78 ft of limestone across four test zones. Petrophysical analysis by Nutech identifies the Middle Kimmeridge section (KL3 and KL4) as being the most prospective as the limestones are contained within a 593 ft section of high Total Organic Carbon (“TOC”) shale – up to 9.4% TOC. The total Kimmeridge section at Horse Hill has an average TOC of 2.8%. It should be noted that the BB-1z core analysis reports TOCs up to 30% in the equivalent high TOC shale zone. Fracture analysis from HH-1 logs also demonstrates that the Kimmeridge shows good evidence of natural fracturing. Fractures aid the flow of hydrocarbons from the reservoir rocks into the well and are critical in low permeability / unconventional reservoir units. This analysis is consistent with recent results from BB-1/1z and Brockham-X4z where image log interpretation shows that both the Kimmeridge shale and limestone beds are naturally fractured as at Horse Hill. Conventional core taken at BB-1z also confirms the presence of open natural fractures, with oil recovered to surface from within open natural fractures within the KL5 reservoir section.