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Numerical simulation of convective stability of the short-term storage of CO_2 in saline aquifers

【摘要】:正In this paper,inertial effects,mass interface and mass transfer mechanism are taken into account.By applying an updated space and time conservation element and solution element(CE/SE) method and hybrid particle level-set method,the stability simulation of the density-driven convection in deep saline aquifers is presented for short-term storage of CO_2.The mass transfer equations coupled with two phase fluid flow equations are solved numerically to investigate effects of CO_2 dissolution into brine on migration Results show that Taylor instability phenomenon has been observed in CO_2 storage in saline aquifers for short time scales,which contributes to the further dissolution of CO_2in saline aquifers.Density-driven convection dominates hydrodynamic trapping,while dissolution process of CO_2 also has a great influence on CO_2 sequestration.

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