Storage potential for CO2 in the Beitstadfjord Basin, Mid-Norway

Abstract

Forkortet The sedimentary sequence in the subsurface of the Beitstadfjord (Mid-Norway) has been assessed with regard to its suitablility for long-term storage of CO2. This study is part of the EU-funded CO2STORE project and was stimulated by the geographical proximity of the Beitstadfjord Basin to a planned power plant in Skogn where CO2 may be captured from the flue gas stream. The sedimentary content of the basin has been interpreted based on seismic data, blocks found at the shore of the fjord, and by analogy to the geology in offshore hydrocarbon fields. The sediments are probably of Jurassic age. Key seismic horizons, including the base of the Quaternary and the top of the basement have been mapped on seismic and depth-converted. Since the basin is nowhere exposed and has not been drilled, the properties of the sedimentary formations are not known. In analogy to the sedimentary succession offshore , two formations are not known. In analogy to the sedimentary succession offshore, two formations with properties suitable for co2 injection have been postulated: the \"Ile formation\" and the \"Garn formation\". These formations form no traps but dip towards northwest. Frie emneord: Aquifer ; Reservoir simulation ; Leakage rate ; CO2 ; Numerical modelling ; Storage capacity ; Carbondioxide storage ; Beitstadfjorden ; Jurassic