Equinor spudded an HPHT exploration well on the Atlantis prospect approximately 9 km north of Huldra on 13 May 2020. It used the "West Hercules" S/S for 30/2-5 S in PL 878. The well has made a gas and condensate discovery, having encountered a 160 m gas column in the targeted Middle Jurassic Brent Group. This included 60 m of poor to moderate quality sandstone reservoir within the Ness (30 m), Etive (15 m), Tarbert (10 m) and Rannoch (5 m) formations. The well was terminated at a TD of 4,390 m in the Lower Jurassic Drake Formation and the discovery has estimated recoverable reserves between 19 and 63 MMboe. The well was plugged and abandoned on 12 July 2020.   Huldra was discovered in 1982 by well 30/2-1 and it came onstream in November 2001. It is a rotated fault block structure with a Brent Group reservoir lying between 3,500-3,900 m. The reservoir was initially HPHT but compression was required to aid production from 2007. From the Huldra platform wet gas was transported to Heimdal for further processing and export and condensate was exported through Veslefrikk. Production ceased in September 2014 by which time it had produced 618 Bcfg, representing a recovery rate of 80%.  Interest in PL 878 is divided between Equinor Energy AS (60% + operator), Source Energy AS (20%) and Wellesley Petroleum AS (20%).
Norway (Viking Graben Province), 30/2-5 S (Atlantis) exploration well, operated by EQUINOR (60%), WELLESLEY (20%), SOURCE EN (20%), in PL 878, announced as a gas and condensate discovery. 160 m gas column in the targeted Middle Jurassic Brent group. This included 60 m of poor to moderate quality sandstone reservoir within the Ness (30 m), Etive (15 m), Tarbert (10 m) and Rannoch (5 m poor-quality only) Formations. The well was terminated at a TD of 4,390 m in the Lower Jurassic Drake Formation and the discovery has estimated recoverable reserves between 19 to 63 MMboe.