Grane oil field
Introduction Grane Oil Field'''Grane''' () is an offshore oil field in the North Sea located  west of the city of Haugesund on the western coast of Norway. It is Norway's first heavy crude oil production field and Statoil's largest heavy oil field in the Norwegian continental shelf. The oil from the field, located in Block 25/11 is transported to Sture terminal via Grane oil pipeline. The injection gas is imported to Grane oil field from the Heimdal, located just north the field.
Ownership The Grane field is operated by Statoil. Statoil holds 38%, Petoro – 30%, ExxonMobil – 25.60%, ConocoPhillips – 6.40%.
Technical features The field lies in  of water at total depth of . The reservoir is nearly  and has an average pay thickness of  with an average porosity of 33% and permeability of 5–10 Darcies. The reservoir consists of sandstones of Heimdal formation of Paleocene age, Lista Formation and has high viscosity.
Development history Norsk Hydro and partners started development of the field in 1991.The Grane field started producing in September 2003.31 production wells were put into operation.The facility was designed by Aker Solutions Engineering in 2000–2003.
Production In Grane oil field, Norsk Hydro used the technology applied its Troll and Oseberg fields to maximize production in Grane. An estimated  is expected to be produced by the field with . With the first horizontal well drilled, Hydro already reached a peak production by 10 March 2006 setting a record at  which exceeded the initially established field plan by about . From then on, the field supplied the market an average .The company expects 55% recovery from the field. This makes Grane third of the size of Oseberg and twice the size of Brage. There is no gas cap in Grane field.
See also *Sture terminal*Heimdal gas field*Oseberg Transport System*Oseberg oil field*North Sea oil*Economy of Norway
References
External links *  Statoil official website