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Carbon dioxide (CO 2 ) injected into a permeable rock stratum will be stored via four major mechanisms, (1) bulk containment of the mobile supercritical phase CO 2 , (2) small-scale trapping by capillary forces, (3) dissolution into the local brine, and (4) chemical reactions with aqueous species and host rock resulting in mineral precipitation. The security and permanence of CO ...
Injection of carbon dioxide (CO2) into saline aquifers confined by low- permeability cap rock will result in a layer of CO2 overlying the brine. Dissolution of CO2 into the brine increases the brine density, resulting in an unstable situation in which more-dense brine overlies less-dense brine. This gravitational instability could give rise to density-driven convection of the fluid, which is a favorable...
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