Grane ( no, Granefeltet) is an offshore oil field in the

North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea, epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the ...

located west of the city of Haugesund on the western coast of

Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and the ...

. It is Norway's first heavy crude oil production field and Statoil's largest heavy oil field in the

Norwegian continental shelf The Norwegian continental shelf ( no, Den norske kontinentalsokkelen) (abbreviated as NCS) is the continental shelf over which Norway exercises sovereign rights as defined by the United Nations Convention on the Law of the Sea. The area of the s ...

. 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 Heimdal is a borough in the city of Trondheim in the municipality of Trondheim in Trøndelag county, Norway. It covers the western and southwestern parts of the municipality. The village area that is also called Heimdal is located in the southe ...

, located just north the field.

Ownership

The Grane field is operated by Statoil. Statoil holds 38%,

Petoro Petoro is a company that is wholly owned by the Government of Norway. Established in 2001, it manages the Government's portfolio—collectively called State's Direct Financial Interest (SDFI)—of exploration and production licenses for ...

– 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 The Paleocene, ( ) or Palaeocene, is a geological epoch that lasted from about 66 to 56 million years ago (mya). It is the first epoch of the Paleogene Period in the modern Cenozoic Era. The name is a combination of the Ancient Greek ''pal ...

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 Aker Solutions ASA, an engineering company based in Oslo, provides the products, systems and services required to unlock energy from sources such as oil, gas, offshore wind and capture. The company, founded in 1841, was known as Aker Kværner u ...

Engineering in 2000–2003.

Production

In Grane oil field,

Norsk Hydro Norsk Hydro ASA (often referred to as just ''Hydro'') is a Norwegian aluminium and renewable energy company, headquartered in Oslo. It is one of the largest aluminium companies worldwide. It has operations in some 50 countries around the world a ...

used the technology applied its

Troll A troll is a being in Nordic folklore, including Norse mythology. In Old Norse sources, beings described as trolls dwell in isolated areas of rocks, mountains, or caves, live together in small family units, and are rarely helpful to human be ...

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.

References

External links