Troll gas field

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,^[2] about 65 kilometres (40 mi) west of Kollsnes, near Bergen.^[3] Most of the gas lies in Troll East.^[4]

• http://en.wikipedia.org/wiki/Troll gas field