The possible future Trollvind floating offshore wind field lies, as illustrated on the map, in the North Sea offshore Norway and 65 km west of Kollsnes outside Bergen in water depths of 250 m – 400 m where floating offshore wind turbines is the only feasible project foundation option.
The area is not far from the Utsira Nord Project. The project was at a conceptual stage and initiated by Equinor with their partners Petoro, TotalEnergies, Shell and ConocoPhillips as a plan to electrify the Troll and Oseberg oil and gas fields in the future.
The projected as-installed capacity of the project is about 1 GW, but in May 2023, Equinor put the project on HOLD due to technology availability, rising cost and a strained timetable.
The Trollvind offshore wind field (Troll Wind in English) is situated in the so-called Norwegian Trench or Norwegian Channel in water depths that range from 250 to 400 m. The trench is about 100 km wide. The very soft soil conditions in the area is well known and many geotechnical engineering evaluations done for existing structures, such as suction anchors related to supporting subsea oil and gas production systems and anchoring platforms. The soil is lightly over-consolidated soft to very soft clay. We have geotechnical engineering parameters, seismic and bathymetric data readily available to perform case studies and cost optimisation for suction anchors used as mooring for the Trollvind mooring.