Troll field subsurface seismic survey under way

A seismic survey of the subsurface has been initiated at the Troll field in the North Sea to determine whether the site is suitable for storage of large volumes of carbon dioxide (CO2) from carbon capture facilities at the industrial plants at Mongstad and Kårstø.

Offshore staff

STAVANGER, Norway -- A seismic survey of the subsurface has been initiated at the Troll field in the North Sea to determine whether the site is suitable for storage of large volumes of carbon dioxide (CO2) from carbon capture facilities at the industrial plants at Mongstad and Kårstø.

StatoilHydro is responsible for the seismic data acquisition, and is using the vesselM/V Ramform Challenger. Gassnova, the state-owned enterprise for handling CO2, is responsible for implementing the government's carbon capture and storage (CCS) project for CO2 from Mongstad and Kårstø.

Another objective of the survey is to determine where the CO2 injection wells should be located. The NPD has studied three potential storage sites for CO2 – the Johansen formation and two potential storage sites connected to the Utsira formation in the Sleipner area.

The Johansen formation is located south of the Troll area in the North Sea at a depth of approximately 2,500 m (8,202 ft) below the Troll oil and gas reservoirs.

09/05/2008

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