UK Oil & Gas Investments PLC (London AIM and ISDX: UKOG) has told DirectorsTalk that Horse Hill Developments Limited has informed the Company that 37-degree API, light, sweet, dry (99-100% oil) crude has flowed to surface, via rod pumping, at an average stabilised rate of 168 barrels per day over a continuous 9-hour period. The flow is from an 103-ft aggregate perforated zone within the Upper Portland sandstone interval at a depth of approximately 615 metres below ground level. Maximum flow during this test period was restricted by the initial rod pump configuration. The flow test will now continue with a pump configuration designed to permit optimal flow over a longer flow period.
The Horse Hill-1 well has now produced at a combined average stable rate of over 1,528 bopd from the two Kimmeridge and Upper Portland zones.
It should be noted that the only commercial Upper Portland oil production in the Weald Basin is from the nearby Brockham field, 8 km to the northwest of HH-1, in which the Company has an indirect 3.6% interest. The Brockham field was discovered by BP in 1987 and flowed 28-degree API oil on an extended well test in 1988, at a maximum stabilised rate on pump of 117 bopd. A subsequent extended well test in 2001, prior to commercial production, produced oil at an average pumped rate of approximately 140 bopd.
Horse Hill-1 Discovery Well and Licence
The exploration drilling phase of the HH-1 discovery well was originally completed at the end of 2014. The well is located within onshore exploration Licence PEDL137, on the northern side of the Weald Basin near Gatwick Airport. UKOG owns a 19.968% interest in PEDL137.
Stephen Sanderson, UKOG’s Executive Chairman commented: “The Horse Hill well still continues to flow and perform above management’s expectations. Higher flow rates and markedly better crude quality than the Upper Portland oil from the nearby Brockham field make the HH-1’s commercial prospects very real. We look forward to the results from the optimised pumping programme.”
