Ekofisk oil field

Ekofisk is an oil field in the Norwegian sector of the North Sea about southwest of Stavanger. Discovered in 1969 after the construction of a series of off-shore platforms by Phillips Petroleum Company. Oil production is planned to continue until at least 2050.

Ekofisk reservoir consists of Cod, Ekofisk, West Ekofisk, Tor, Albuskjell, Eldfisk, Edda and Embla oil fields. The Ekofisk Center is a vast complex of platforms and structures creating a transportation hub also for surrounding fields such as Valhall, Hod, Gyda, Ula, Statfjord, Heimdal, Tommeliten and Gullfaks. The whole complex consists of 29 platforms. Produced oil is transported by the Norpipe oil pipeline to the ConocoPhillips Teeside Terminal in the United Kingdom. Natural gas is transported by the Norpipe gas pipeline to Emden in Germany.

Subsidence

In the mid-1980s the Ekofisk field as a whole and the platforms in particular were found to be suffering from an unexpected degree of subsidence. Detailed geological investigation showed that it was the result of delayed compactional diagenesis of the Chalk Formation reservoir rocks. As hydrocarbons were produced and replaced with water, the Chalk began to...
Read More