The Oseberg area
The Oseberg Field Centre includes three platforms, Oseberg A, B and D, connected to one another with bridges, in the southern part of the Oseberg field, and the Oseberg C platform, which lies 14 kilometres north of the field centre.
Oseberg A is a concrete base platform with process equipment and living quarters, while Oseberg B sits atop a steel jacket and has drilling, production and injection equipment.
Oseberg D is a steel platform with gas processing and export equipment. It was connected to the Field Centre with a bridge in 1999.
Oseberg C is an integrated drilling, accommodation and production platform with a steel jacket.
Gas export started from the Oseberg Field Centre on October 1, 2000. This represented the beginning of a new era for the Oseberg field and for Hydro as an offshore operator.
Transport
Production from the Tune field (gas and condensate) is transported to the Oseberg Field Centre. Condensate is sent on to the land-based Sture terminal, and the gas injected into the Oseberg field.
Field Centre equipment is also used to handle oil and gas from the Oseberg Øst and Oseberg Sør satellite fields.
Oil from the Oseberg area is transported through the Oseberg Transport System (OTS) to the Sture terminal.
Oil from the Oseberg Sør, Oseberg Øst, Brage and Veslefrikk fields is also pumped through the same transport system.
The gas is transported to market via the Oseberg Gas Transport (OGT) pipeline and into the Statpipe and Vesterled systems via the Heimdal Gas Centre.
Location: Block 30/6 and 30/9, about 130 kilometres north-west of Bergen
Production start: 1 December 1988
Production: Oil and gas
Oseberg Sør
The Oseberg Sør platform in the North Sea commenced production in the winter of 2000.
The Oseberg Sør field, consisting of several structures south of the Oseberg field, is developed with an integrated drilling, accommodation and production platform on a steel jacket.
A sea-floor installation with four wells into the K geological structure is tied into the Oseberg Sør platform. In 2004, a new sea-floor installation started production from the J structure. There are 34 wells planned for the field.
Transport
The oil is transported via the Oseberg Field Center and Oseberg Transport System to the Sture terminal.
Location: Block 30/9, 13 kilometres south of Oseberg Field Centre
Production start: 5 February 2000
Production: Oil and gas
Oseberg C
Oseberg C lies 10 km north of the Oseberg field centre, and is an integrated accommodation, production and drilling platform with a steel jacket. Oil is produced from 18 wells. From three of the wells crude oil is sent in a multiphase pipeline to the field centre for processing.
Water is injected into three wells and gas into five wells to improve the oil recovery rate. Around 25,000 - 30,000 barrels of oil is produced from the field per day.
The oil is subject to a three-phase separation with pressure support in the reservoir from three compressors. Stabilised oil is transported to the Sture terminal via the field centre.
Transport
The oil is transported to the Sture terminal via the field centre
Location: 10 km north of the Oseberg field centre
Start-up: December 1991
Oseberg Øst
The smallest platform in the Oseberg area, Oseberg Øst, lies 25 kilometres north-east of the Oseberg Field Centre.
The field is developed with an integrated drilling, accommodation and production platform with equipment for first phase processing.
The oil goes through second and third phase processing at the Oseberg Field Centre, before it is transported in an oil pipeline to the Sture terminal.
Maximum output is about 75,000 barrels of oil per day. Water and gas are injected into the reservoir to boost recovery.
Transport
The oil is transported by pipeline via the Oseberg Transport System (OTS) to the Sture terminal.
Location: 25 kilometres north-east of the Oseberg Field Centre
Start-up: 3 May 1999
