Grane oil field
Encyclopedia
Grane is an offshore oil field
in the North Sea
located 185 km (115 mi) 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. 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.
. Statoil holds 38%, Petoro
– 30%, ExxonMobil
– 25.60%, ConocoPhillips
– 6.40%.
. The reservoir consists of sandstones of Heimdal formation of Paleocene age, Lista formation and has high viscosity.
used the technology applied its Troll
and Oseberg
fields to maximize production in Grane. An estimated 700 Moilbbl is expected to be produced by the field with 214 koilbbl/d. With the first horizontal well drilled, Hydro already reached a peak production by 10 March 2006 setting a record at 243 koilbbl/d which exceeded the initially established field plan by about 30 koilbbl. From then on, the field supplied the market an average 220 koilbbl/d.
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.
Oil field
An oil field is a region with an abundance of oil wells extracting petroleum from below ground. Because the oil reservoirs typically extend over a large area, possibly several hundred kilometres across, full exploitation entails multiple wells scattered across the area...
in the North Sea
North Sea
In the southwest, beyond the Straits of Dover, the North Sea becomes the English Channel connecting to the Atlantic Ocean. In the east, it connects to the Baltic Sea via the Skagerrak and Kattegat, narrow straits that separate Denmark from Norway and Sweden respectively...
located 185 km (115 mi) west of the city of Haugesund
Haugesund
is a town and municipality in the county of Rogaland, Norway.-Location:Haugesund was separated from Torvastad as a town and municipality of its own in 1855. The rural municipality of Skåre was merged with Haugesund on January 1, 1958. Haugesund is a small municipality, only 73 km²...
on the western coast of Norway
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...
. It is Norway's first heavy crude oil production field and Statoil
Statoil
Statoil ASA is a Norwegian petroleum company established in 1972. It merged with Norsk Hydro in 2007 and was known as StatoilHydro until 2009, when the name was changed back to Statoil ASA. The brand Statoil was retained as a chain of fuel stations owned by StatoilHydro...
's largest heavy oil field. The oil from the field, located in Block 25/11 is transported to Sture terminal
Sture terminal
Sture Terminal is an oil terminal at Stura in Øygarden municipality, northwest of Bergen, Norway. It receives oil and condensate from Oseberg, Veslefrikk, Brage, Oseberg Sør, Oseberg Øst, Tune and Huldra fields through Oseberg Transport System and oil from Grane oil field through Grane oil...
via Grane oil pipeline
Grane Oil Pipeline
Grane oil pipeline is a pipeline system in western Norway. It is long and runs from Grane oil field to Sture terminal, located north of Bergen, Norway. The pipeline operations commenced with start of production in the Grane oil field.-Technical features:...
. The injection gas is imported to Grane oil field from the Heimdal
Heimdal gas field
Heimdal is an offshore natural gas field in the North Sea located northwest of the Stavanger, Norway. Heimdal serves as a connection hub for processing and distribution of natural gas from satellite fields....
, located just north the field.
Ownership
The Grane field is operated by StatoilStatoil
Statoil ASA is a Norwegian petroleum company established in 1972. It merged with Norsk Hydro in 2007 and was known as StatoilHydro until 2009, when the name was changed back to Statoil ASA. The brand Statoil was retained as a chain of fuel stations owned by StatoilHydro...
. Statoil holds 38%, Petoro
Petoro
Petoro, a company wholly owned by the state of Norway, manages Norway's portfolio of exploration and production licenses for petroleum and natural gas on the Norwegian continental shelf. This portfolio is collectively called State's Direct Financial Interest . The company also has a control...
– 30%, ExxonMobil
ExxonMobil
Exxon Mobil Corporation or ExxonMobil, is an American multinational oil and gas corporation. It is a direct descendant of John D. Rockefeller's Standard Oil company, and was formed on November 30, 1999, by the merger of Exxon and Mobil. Its headquarters are in Irving, Texas...
– 25.60%, ConocoPhillips
ConocoPhillips
ConocoPhillips Company is an American multinational energy corporation with its headquarters located in the Energy Corridor district of Houston, Texas in the United States...
– 6.40%.
Technical features
The field lies in 128 metres (419.9 ft) of water at total depth of 1700 metres (5,577.4 ft). The reservoir is nearly 27 square kilometres (10.4 sq mi) and has an average pay thickness of 50 metres (164 ft) with an average porosity of 33% and permeability of 5–10 DarciesDarcy
A darcy and millidarcy are units of permeability, named after Henry Darcy. They are not SI units, but they are widely used in petroleum engineering and geology. Like other measures of permeability, a darcy has the same units as area.-Definition:Permeability measures the ability of fluids to...
. The reservoir consists of sandstones of Heimdal formation of Paleocene age, Lista formation and has high viscosity.
Development history
Statoil and partners started development of the field in 1991. The Grane field started producing in September 2003. 31 production wells were put into operation.Production
In Grane oil field, Norsk HydroNorsk Hydro
Norsk Hydro ASA is a Norwegian aluminium and renewable energy company, headquartered in Oslo. Hydro is the fourth largest integrated aluminium company worldwide. It has operations in some 40 countries around the world and is active on all continents. The Norwegian state holds a 43.8 percent...
used the technology applied its Troll
Troll
A troll is a supernatural being in Norse mythology and Scandinavian folklore. In origin, the term troll was a generally negative synonym for a jötunn , a being in Norse mythology...
and Oseberg
Oseberg oil field
Oseberg is an offshore oil field with a gas cap in the North Sea located northwest of the city of Bergen on the southwestern coast of Norway....
fields to maximize production in Grane. An estimated 700 Moilbbl is expected to be produced by the field with 214 koilbbl/d. With the first horizontal well drilled, Hydro already reached a peak production by 10 March 2006 setting a record at 243 koilbbl/d which exceeded the initially established field plan by about 30 koilbbl. From then on, the field supplied the market an average 220 koilbbl/d.
The company expects 55% recovery from the field. This makes Grane third of the size of Oseberg and twice the size of Brage
Brage oil field
Brage is an offshore oil field in the North Sea located northwest of the city of Bergen on the western coast of Norway and east of Oseberg Field Center. The field also contains gas. The water depth at the location is...
. There is no gas cap in Grane field.
See also
- Sture terminalSture terminalSture Terminal is an oil terminal at Stura in Øygarden municipality, northwest of Bergen, Norway. It receives oil and condensate from Oseberg, Veslefrikk, Brage, Oseberg Sør, Oseberg Øst, Tune and Huldra fields through Oseberg Transport System and oil from Grane oil field through Grane oil...
- Heimdal gas fieldHeimdal gas fieldHeimdal is an offshore natural gas field in the North Sea located northwest of the Stavanger, Norway. Heimdal serves as a connection hub for processing and distribution of natural gas from satellite fields....
- Oseberg Transport SystemOseberg Transport SystemOseberg Transport System is a pipeline system in western Norway. It is long and runs from Oseberg, Veslefrikk, Brage, Frøy and Lille-Frigg to Sture terminal, located north of Bergen, Norway. The operation of the pipeline was commenced in 1988...
- Oseberg oil fieldOseberg oil fieldOseberg is an offshore oil field with a gas cap in the North Sea located northwest of the city of Bergen on the southwestern coast of Norway....
- North Sea oilNorth Sea oilNorth Sea oil is a mixture of hydrocarbons, comprising liquid oil and natural gas, produced from oil reservoirs beneath the North Sea.In the oil industry, the term "North Sea" often includes areas such as the Norwegian Sea and the area known as "West of Shetland", "the Atlantic Frontier" or "the...
- Economy of NorwayEconomy of NorwayThe economy of Norway is a developed mixed economy with heavy state-ownership in strategic areas of the economy. Although sensitive to global business cycles, the economy of Norway has shown robust growth since the start of the industrial era...