On 1 July 2018 Wellesley used the âTransocean Arcticâ S/S to spud a second well in PL 925. 35/12-7 was targeting the Serin prospect which was spatially mapped to overlay the southern part of the Grosbeak discovery. TD was reached at 2,726 m in the Oseberg Formation. The well penetrated two units of sandstone in the Heather Formation. The top unit contained around 7 m of water-wet sandstone while the lower unit contained around 25 m of water-wet sandstone. Traces of gas were detected in the top unit with good reservoir properties in both units. However, the well was dry and was being abandoned on 25 July 2018.   Grosbeak was drilled in 2009 by Wintershall with well 35/12-2. Oil and gas was encountered in the Upper Jurassic Sognefjord Formation and oil was present in the Middle Jurassic Brent Group. Estimated recoverable reserves (based on the discovery well) were calculated at 35-190 MMboe. In 2011 the find was appraised by 35/12-4 S and 35/12-4 A. A 40m oil column was proven in a good quality Middle Jurassic Ness Formation reservoir in 35/12-4 S and the well tested at 5,032 bo/d, with associated gas, through a 44/64â choke. The 35/12-4 A sidetrack investigated the upper part of the Ness Formation but no hydrocarbons were present. The two wells were located in the southerly part of PL 378 which was relinquished in 2017, enabling Wellesley to bid for the area in APA 2017.     Interest in PL 925 is held by Wellesley Petroleum AS (90% + operator) and Concedo ASA (10%).
035/12-07 (Serin) (Wellesley 90% op, Concedo 10%) in PL 925 block, overlay of S. part of Grosbeak structure, Upper Jurassic Heather fm. sst units largely water-wet with some gas traces, to be P&A as dry, WD=358m, TD=2726m. 