Modelling and Simulation of Mechanisms for Leakage of CO2 from Geological Storage

Abstract

For investigation of the risks associated with future geological storage of CO 2 , and for determining the minimum requirements for the quality of geological storage sites, detailed study of possible leakage mechanisms is necessary. Mechanisms for potential leakage from primary CO 2 storage in deep saline aquifers have been studied. A buoyancy-driven flow of CO 2 through a percolating network of permeable bodies in an otherwise sealing cap-rock has been simulated on a geological model of the overburden composed of geological features characteristic for a marine sediments. Channels and lobes from turbidite flows are significant constituents to form a possible leakage pathway in this study.