Equinor has commenced natural gas production from the third phase of the Troll field in the Norwegian North Sea.

The Troll phase 3 project involved the development of eight wells, a new pipeline and umbilical connecting the templates to the Troll A platform, in addition to a new gas processing module on the platform.

Estimated to cost $920.8m (Nkr8bn), the phase 3 project is expected to extend the production lifetime of Troll A platform beyond 2050.

Equinor Norway exploration and production executive vice-president said: “Troll phase 3 will extend the life of Troll A and the Kollsnes processing plant beyond 2050, and the plateau period by 5-7 years.

“This will help secure jobs offshore, at Sandsli and at Kollsnes for both Equinor and its suppliers for several decades into the future.”

Equinor anticipates the Troll phase 3 project to have a break-even price of below $10 and CO₂ emissions of less than 0.1kg per barrel oil equivalent.

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According to the estimates, the Troll phase 3 has recoverable volumes of 347 billion cubic metres of gas.

Equinor projects, drilling and procurement executive vice-president Arne Sigve Nylund said: “Troll phase 3 is one of the most profitable projects throughout Equinor’s entire history, while at the same time featuring production with record-low CO₂ emissions.

“This is thanks to large gas reserves and a development solution mostly based on existing infrastructure, such as pipelines, the processing plant at Kollsnes and, not least, the Troll A platform which receives power from shore.”

The latest development’s annual revenue for the Norwegian government is expected to average more than $1.9bn (Nkr17bn), Equinor said.

Troll delivers around 8% of the European Union’s gas consumption. Equinor operates the field with a 30.58% stake.

Other partners include state energy firm Petoro (56%), Royal Dutch Shell (8.10%), TotalEnergies (3.69%) and ConocoPhillips (1.62%).

Said to be Norway’s largest gas producer, the Troll field development aims to recover nearly 65% of the remaining gas reserves, even after production of more than 20 years.