Troll is a natural gas and oil field in the Norwegian sector of the North Sea, one of the biggest in the North Sea, holding 40% of Norway’s gas – it also possesses significant quantities of oil, in thin zones under the gas cap, to the west of the field. The field as a whole consists of the main Troll East and Troll West structures in blocks 31/2, 31/3, 31/5 and 31/6, about 65 kilometres (40 mi) west of Kollsnes, near Bergen. Most of the gas lies in Troll East.
The field is operated by Statoil, which has a 30.58% interest. The other partners are Petoro (56%), Royal Dutch Shell (8.1%), ConocoPhillips (1.62%) and Total S.A. (3.69%).
The Troll B Platform is a semi-submersible designed by Doris and fabricated from concrete; thought to be the only concrete semisubmersible. This platform came into production in 1995.
2015 - 4 weeks
20 hours welding work
Two-person multidiscipline personnel for scaffolding, rigging and habitat
In accordance with plan
No accidents or incidents
Riser replacement E-test SLMP 2014 - 2017