Wellesley spudded the third of its three back-to-back wells in the Grosbeak area on 27 July 2018. Using the âTransocean Arcticâ S/S for 35/11-21 S in PL 248 I, the company targeted Grosbeak West in the southern part of the field. The well had objectives in the Middle Jurassic Ness (expected at 2,543 m, 2,335 m TVDSS) and Etive (expected at 2,621 m, 2,413 m TVDSS) formations. It was drilled to TD at 2,800 m (2,564 m TVDSS) in the Lower Jurassic Cook Formation and it proved a 90 m oil column (45 m net sandstone) in the Ness and Etive sections with no OWC. The Ness reservoir was tested and flowed at a rate of 6,265 MMbo/d through a 48/64â choke. On 6 September 2018 sidetrack 35/11-21 A was kicked-off. This well investigated the Upper Jurassic Sognefjord Formation (expected at 2,203 m, 1,945 m TVDSS) and Middle Jurassic Fensfjord Formation (expected at 2,292 m, 2,034 m TVDSS) in addition to the Ness (expected at 2,656 m, 2,398 m TVDSS) and Etive (expected at 2,741 m, 2,483 m TVDSS) formations. Wellesley drilled to TD at 2,931 m (2,614 m TVDSS) in the Cook Formation. A 45 m gas column was present in the Sognefjord Formation (20 m sandstone) with no GWC, a 1 m gas column above an 8 m oil column (2 m sandstone) was present in the Fensfjord Formation and a 50 m oil column (15 m sandstone) was proven in the Ness Formation with no OWC. Total recoverable reserves (from the NPD) are estimated at 50-120 MMbo plus 250-413 Bcfg, a significant increase on the previous estimate. The well was abandoned on 17 October 2018.  New licence PL 248 I was carved out from Statoilâs PL 248 C in December 2017 and Wellesley subsequently took over Statoilâs 30% interest and operatorship. It covers the western part of Grosbeak. The eastern part lies in newly-awarded PL 925 which Wellesley acquired in APA 2017.    Grosbeak was drilled in 2009 by Wintershall with well 35/12-2. Oil and gas was encountered in the 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 40 m oil column was proven in a good quality 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.     Interest in PL 248 I is divided between Wellesley Petroleum AS (60% + operator) and Petoro AS (40%).
Norway, PL 248