CO2 Storage in the Utsira-Skade Aquifer in the Norwegian North Sea

The Utsira Formation is a large Late Miocene and Early Pliocene sand deposit with excellent reservoir properties. In the southern part of the formation 1 Mega tons of CO2 from the Sleipner field has been injected pr year since 1996 by Statoil. A remapping and a calculation of the total theoretical capacity in the Utsira Formation with respect to CO2 storage has been done as a part of an NPD study of the total theoretical capacity of the Norwegian sector of the North Sea. The scope of this study has been to evaluate the communication between the central part of the Utsira Formation and surrounding sandy systems, in particular the Hutton sand (informal name used in british sector of the North Sea).