On 3 December 2019 Equinor spudded exploration well 15/3-12 S on the Sigrun East prospect. The well location is approximately 4 km southeast of Sigrun discovery well 15/3-4. 15/3-12 S was drilled jointly between PL 025 and PL 187 using the âWest Phoenixâ S/S. The objective was the Middle Jurassic Hugin Formation and there was a secondary target in the Upper Jurassic Draupne Formation. TD has been reached at 3,810 m and on 21 January 2020 sidetrack 15/3-12 A was kicked-off. This well has a planned TD of 4,044 m (3,868 m TVD) and is being drilled because the main wellbore was not sited in an optimal position to test the Draupne target. Equinor had drilled the 12-1/4" hole to section TD at 3,593 m (3,427 m TVD) and had started logging, but then ran into issues which led to a technical sidetrack (T2) being kicked-off in early February 2020. By 19 February 2020 it had reached TD at 4,037 m and was plugging back.  The Sigrun discovery was made by Elf Petroleum in 1982. 25/3-4 proved oil and gas at four levels in the Hugin and Sleipner formations with different pressure regimes. A test in the Hugin Formation flowed at a rate of 3,868 bo/d plus 8.65 MMcfg/d through a 40/64â choke. A downdip appraisal well was drilled in 1983 / 1984 which established an OWC at 4,023 m. The Hugin Formation was absent and the Sleipner Formation consisted of thin sandstones with a net pay of less than 7 m.   In 2018 Equinor drilled appraisal well 15/3-11 which confirmed a 35 m oil column (15 m of sandstone) in the Hugin Formation with no OWC. As a result of this well, Equinor increased the estimated recoverable reserves range from 2-9 MMboe to 7-13 MMboe and a development using the Gudrun facilities is being considered.  Equinor Energy AS operates PL 025 with a 36% interest. It is partnered by Neptune Energy Norge AS (25%), OMV (Norge) AS (24%) and Repsol Norge AS (15%).
15/03-12 S (Sigrun East) (Equin 36% op. Neptune 25%, OMV 24%, Repsol 15%) in PL 025 block The objective was the Middle Jurassic Hugin Fm and there was a secondary target in the Upper Jurassic Draupne Fm. TD=3810 m. Abandoning, w.o. details.