Equinor Energy AS increased gas production from the Troll A platform in the North Sea after completing the Troll Phase 3 stage 2 subsea project, accelerating production of 55 billion cu m of gas from the Troll West reservoir.

Troll Phase 3 stage 2 builds on the subsea installations from the Troll Phase 3 project, which came on stream in 2021, reusing design and standardized solutions.

Originally scheduled to start up towards the end of the year, the project came online on Aug. 22, about 2 years after the partnership reached final investment decision on the development.

The eight-well drilling campaign was completed in 5.5 months by the Deepsea Aberdeen rig from Odfjell, with services from SLB and Baker Hughes. Templates and manifolds were built by Aker Solutions in Egersund for main supplier OneSubsea and installed on the field by Ocean Installer.

The project's umbilical, supplied by OneSubsea in Moss, and the MEG line have been extended from existing installations. A 28-km, 36-in. pipeline was installed by the Pioneering Spirit.

Equinor Energy AS is operator of the new Troll West increased gas recovery north (TWIN; 30.55%) with partners Petoro AS (55.93%), A/S Norske Shell (8.19%), TotalEnergies EP Norge AS (3.69%), and ConocoPhillips Skandinavia AS (1.64%).