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UK Oil & Gas updates on Broadford Bridge-1 work

By BFN News | 02:09 PM | Thursday 10 August, 2017

UK Oil & Gas Investments has announced that, to optimise well completion and subsequent flow test performance, it has successfully drilled, logged and cased a mechanical sidetrack, BB-1z, at its 100% owned Broadford Bridge-1 exploration well located in licence PEDL234. The Company said the sidetrack has fulfilled its objective of replicating the geological success of BB-1, via a mirror-image borehole within the Kimmeridge. It added: "The new borehole delivers a fresh, identical section of heavily-fractured oil-bearing Kimmeridge reservoir, with minimal formation damage and an in-gauge, cased-off, 8.5-inch borehole optimal for well completion and flow testing. "A mechanical sidetrack was included as a provision in the Oil and Gas Authority's ("OGA") permission to drill BB-1, being a normal contingency during drilling operations. "Following the month-long coring and electric logging programme it became apparent that the duration and difficulty of coring such highly-fractured rocks in an inclined well led to potential plugging of some intensely fractured Kimmeridge zones likely jeopardising flow test performance. Sections of the overlying Purbeck also exhibited washout zones making both optimal casing-setting in the full 8.5-inch open hole section and resultant Kimmeridge well completion problematic. Using lessons learnt from BB-1, the short-duration sidetrack was drilled using the same non-toxic drilling fluid but with a lower density and higher viscosity mixture to minimise reservoir formation damage via possible plugging of oil-filled fractures. The sidetrack's in-gauge 8.5-inch borehole was cased-off successfully without problem and will now be completed for flow testing." At 2:09pm: (LON:UKOG) UK Oil Gas Investments Plc share price was +0.08p at 7.55p Story provided by

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