OSLO, Norway — The Norwegian Petroleum Safety Authority has authorized Equinor consent to use new facilities for the supply of power from shore to Troll Vest in the northern North Sea.
Its consent covers use of equipment for electrification of the Troll B and Troll C platforms, including associated power cables and a substation onshore at Kollsnes.
In April 2022 Equinor submitted its plan for partial electrification of Troll B platform and full electrification of Troll C. This envisaged a subsea cable to the two platforms with a landfall at Kollsnes, west of Bergen; a high-voltage subsea cable from Kollsnes to Troll B; and another between Troll B and Troll C.
Equinor claimed the scheme would reduce CO2 emissions by almost half a million metric tons annually.
Troll, in a water depth of up to 330 m, started production started in 1995 through the Phase 1 Troll A fixed wellhead and compression facility with a concrete substructure.
Troll Phase II was then developed through Troll B, a floating concrete accommodation and production installation, and Troll C, a semi-submersible accommodation and production steel facility.
Phase I was designed to recover gas reserves in Troll Øst while Phase II focused on oil reserves in Troll Vest. Troll Phase III (gas production from Troll Vest) started in 2021.