Troll gas field
| Troll field | |
|---|---|
 Troll A platform in the Troll gas field |
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| Country | Norway |
| Region | North Sea |
| Location | North Sea |
| Block(s) | 31/2, 31/3, 31/5, 31/6 |
| Offshore/onshore | offshore |
| Coordinates | 60°38′44″N 3°43′35″E / 60.645556°N 3.726389°ECoordinates: 60°38′44″N 3°43′35″E / 60.645556°N 3.726389°E |
| Operator(s) | Statoil |
| Partners | Statoil, Petoro, Royal Dutch Shell, ConocoPhillips, Total S.A. |
| Field history | |
| Start of production | 1995 |
Troll is a natural gas and oil field in the Norwegian sector of the North Sea, 100 kilometres (62 mi) North-West of Bergen, 50 kilometres (31 mi) west of the island of Fedje.
Although Troll is primarily a gas field – one of the biggest in the North Sea, holding 60% of Norway’s gas reserves – 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, in water depths of 315 to 345 metres (1,033 to 1,132 ft). Most of the gas lies in Troll East.[1]
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%).
Gas and oil from the field is extracted via three platforms – Troll A, B and C.
The Troll A platform, based on the Condeep technology, is the largest structure ever to be moved. Total weight is 656,000 tons, the total height is 472 metres (1,549 ft). The depth is 303 metres (994 ft).[2] This platform came into production in 1996.
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.
The Troll C Platform is a conventional steel hull semi-submersible designed by GVA Consultants. This platform came into production in 1999.
[edit] References
- ^ Offshore Technology Website http://www.offshore-technology.com/projects/troll/
- ^ Troll A Platform at Structurae
[edit] External links
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