Southern North Sea
28 June 2018

Deviated exploration well on Cepheus prospect (Cygnus Block 8); fault block down-thrown from Cygnus Field and dipping to north, with closure from 11,180–11,415 ft, at top Lower Leman reservoir objective. Well deviated NE to avoid shallow gas with BHL on block 44/12b. Top Lower Leman at 11,591 ft (11,198 ft TVDSS) was 14 ft deep to prognosis, with 80 ft gas column (31 ft net pay) to gas-water contact at 11,674 ft (11,278 ft TVDSS); 10 ft high to prognosis and to gas in adjacent Cygnus Block 3. Reservoir fully cored and
gas/water samples recovered on wireline.

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