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In carbon capture and storage (CCS), CO(2) is captured at power plants and then injected underground into reservoirs like deep saline aquifers for long-term storage. While CCS may be critical for the continued use of fossil fuels in a carbon-constrained world, the deployment of CCS has been hindered by uncertainty in geologic storage capacities and(More)
We study the gravity-exchange flow of two immiscible fluids in a porous medium and show that, in contrast with the miscible case, a portion of the initial interface remains pinned at all times. We elucidate, by means of micromodel experiments, the pore-level mechanism responsible for capillary pinning at the macroscale. We propose a sharp-interface(More)
The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Abstract The effect of flow instabilities on capillary trapping mechanisms is a major source of uncertainty in CO 2 sequestration in deep saline aquifers. Standard macroscopic models of multiphase flow in porous media are unable to explain(More)
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