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Utsira formation

Last modified: 2013-10-25T20:01:08+01:00
Blue Marker Utsira formation

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Capture Method:
Capture Technology:
Capital cost:
approximately 1 million tonnes CO2 tonnes
58.1707024835 2.63671875


Scale: Small
Type of storage:



approximately 1 million tonnes CO2 tonnes/CO2


approximately 1 million tonnes CO2 tonnes/CO2


Photo: Statoil


Since 1996, Statoil have captured one million tonnes of carbon dioxide from natural gas production at Sleipner West and stored it in an aquifer more than 800 metres below the seabed. On Sleipner, carbon dioxide is captured using a conventional amine process and stored in geological layers. Statoil captures daily 2 600 tonnes of CO2 from the produced gas on Sleipner.

At the end of 2008 almost 11 million tones of CO2 have been stored. The way the CO2 spreads underground has been monitored in various research projects which are funded in part by the EU.

The Utsira reservoir is continuously monitored using seismology, and comprehensive models have been developed for calculating how the carbon dioxide moves in the reservoir. Seismic testing in June 2008 showed that the storage is proceeding as planned. The Sintef research foundation and the Norwegian University of Science and Technology (NTNU) in Trondheim are involved in addition to several international research institutions.

Every second year, Statoil collects seismic 4D- data. The carbon dioxide covers an area of 3 km3 of the 26 000 km3 large formation.

Between July 2007 and December 2008, Gassco conducted concept studies for pipeline transport of CO2 from Naturkraft’s gas-fired power plant at Kårstø and the energy plant at Mongstad to a long-term geological storage site on the continental shelf. The studied solutions are pipelines from Kårstø and Mongstad to the Sleipner A Platform, the Johansen Formation and the Utsira Formation in the Sleipner area (Utsira South).

Gassnova continues to mature a seafloor solution, including injection in Utsira South, as a possible investment decision alternative for CO2 Kårstø in autumn 2009. Gassnova considers the Utsira Formation to be the only realistic alternative enabling the compliance with the schedule for CO2 Kårstø.

Further assessments prior to the investment decision for the CO2 pipeline from Kårstø will include a 12" pipeline for transport to storage in the Utsira Formation. The pipeline will be able to transport CO2 to Sleipner A or Utsira South, which both are in the Utsira Formation.

Transport solutions were assessed under consideration of capacities, costs, reservoir conditions and technological risk. Pre-engineering lasted until September 2009, when background material for the investment decision shall be ready for submission to the Ministry of Petroleum and Energy.

Now the projects on both Kårstø and Mongstad are delayed or cancelled.