Abstract
A question that is often raised during discussing around underground CO2 storage in saline quifers, is whether the stored CO2 will stay in place, and how to evaluate and quantify safe storage and ensure acceptable low seepage. In this study a workflow has been tested on a potential subsurface CO2 storage site at the Smeaheia area, offshore Norway. The effect of the pressure depletion from the giant gas Troll Field, starting production in 1995 has been simulated. As a conformance test, the simulated pressure has been compared with measured pressures from a newly drilled exploration well in the study area, with good match. Simulated pressures have used as input to simulate CO2 injection and saturation varying the reservoir heterogeneities. Different conformance tests have been discussed using bottom hole pressure to evaluate potential CO2 injection, or collection new seismic.
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