Statfjord was discovered by Mobil in 1974, and then Statoil, now Equinor, took over the operatorship on 1 January 1987.
The field has been developed with the Statfjord A, B and C production platforms, which all have concrete gravity base structures incorporating storage cells.
Statfjord A
Began production on 24 November 1979.
Topside weight: 41,500 tons
Concrete substructure weight: 200,100 tons
Storage volume: 206,000 m3
Total height: 270 metres
Living quarters accommodate: 206 people.
Production start: 24 November 1979
Statfjord B
Followed on 5 November 1982, and Statfjord C on 26 June 1985.
The Norwegian share of the field lies in blocks 33/9 and 33/12 in production licence 037, while the British part is in UK block 211/25 in licences 104 and 293.
Statfjord is one of the oldest producing fields on the Norwegian continental shelf, and the largest oil discovery in the North Sea.
Oil and gas transport
Statfjord oil production is loaded into shuttle tankers on the field and shipped to a number of ports in north-western Europe.
The gas export, previously going via Statpipe to Kårstø, has since the startup of Statfjord Late-life in 2008 gone through Tampen Link and the FLAGS system to the St. Fergus gas terminal in Scotland.
Britain’s 14.53 per cent of the gas has since the startup of the Statfjord field travelsled by a separate pipeline via the NLGP pipeline to Scotland.
Cargoes are allocated between the field licensees in proportion to their interest in the respective licences.
Storage capacity
The storage cells on the Statfjord A hold 206 000 standard cubic metres, 1.3 million barrels of oil
The storage cells on the Statfjord B hold 302 000 standard cubic metres, 1.9 million barrels of oil
The storage cells on the Statfjord C hold 302 000 standard cubic metres, 1.9 million barrels of oil
Oil and gas production
The hydrocarbon reservoir formations on Statfjord lie at depths of 2 500-3 000 metres. They consist of sandstones, with the oil and gas held in pores between the individual sand grains. These hydrocarbon-bearing sediments were all deposited in the Jurassic era, about 150 million years ago.
The production record for a single day on Statfjord was set on 16 January 1987, when 850 204 barrels were produced.
Roughly four million cubic metres of gas are exported daily by the Statfjord Unit.
Topside weight: 42,500 tons
Concrete substructure weight: 310,500 tons
Storage volume: 302,000 m3
Total height: 271 metres
Living quarters accommodate: 228 people.
Production start: 5 November 1982
Statfjord C
Topside weight: 50,000 tons
Concrete substructure weight: 290,000 tons
Storage volume: 302,000 m3
Total height: 290 metres
Living quarters accommodate: 345 people.
Production start: 26 June 1985
Area: The Norwegian share of the field lies in blocks 33/9 and 33/12 in production licence 037, while the British part is in UK block 211/25 in licences 104 and 293
Production: Oil and gas