Further Update on Flow Test Horse Hill-1 Oil Discovery, Weald Basin, UK

Further Significant Oil Flows to Surface from Lower Kimmeridge Limestone Following the announcement on 16 February 2016, UK Oil & Gas Investments PLC (London AIM and ISDX: UKOG) announced that Horse Hill Developments Limited (“HHDL”) has informed the Company that light, 40-degree API, sweet oil has continued to flow naturally to surface from an 80-foot zone within the Lower Kimmeridge limestone interval at a depth of approximately 900 metres below ground level.
Flow re-commenced at around 07.45 am GMT yesterday at a steady oil rate in excess of 456 barrels of oil per day over a further 9.5-hour period using a smaller 28/64-inch choke in order to further stabilise the flow. Yesterday’s flow consisted of dry oil with zero water.
As previously announced, Phase 2 and Phase 3 operations will move to the shallower Upper Kimmeridge limestone and Portland sandstone zones at approximately 840 and 615 metres below ground level, respectively, once the Lower Kimmeridge testing is completed.
The HH-1 discovery well, the original exploration drilling phase originally completed at the end of 2014, is located within onshore exploration Licence PEDL137, on the northern side of the Weald Basin near Gatwick Airport. UKOG owns a 20.163% interest in PEDL137.
Stephen Sanderson, UKOG’s Executive Chairman commented:

“The well continues to produce high quality oil at good rates. Although further work is required to be done, we are now beginning to establish the commerciality of the project earlier than originally anticipated. The first two tankers full with 348 barrels of oil were sent to be refined at noon
yesterday.”

    UKOG’s interest in Horse Hill

The HH-1 well is located within onshore exploration Licence PEDL137, on the northern side of the Weald Basin near Gatwick Airport. UKOG owns a 30% direct interest in HHDL and a 1.02% interest in HHDL via its 6% interest in Angus Energy Limited. HHDL is a special purpose company that owns a 65%
participating interest and operatorship of Licence PEDL137 and the adjacent Licence PEDL246 in the UK Weald Basin.
Source: UK Oil & Gas Investments PLC
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