Effects of Reservoir Heterogeneity on CO2 Dissolution Efficiency in Randomly Multilayered Formations

Carbon dioxide (CO2) dissolution is the secondary trapping mechanism enhancing long-term security of CO2 in confined geological formations. injected into a randomly multilayered formation will preferentially migrate along high permeability layers, increasing efficiency. In this study, sequential Gaussian simulation adopted to construct stratified saline formations, and two-phase flow based on MRST established illustrate spatial mobility distribution migration. The results show that gravity index G heterogeneity σY2 are two predominant factors controlling transports. migration shows totally different under heterogeneity. When discrepancy relatively larger, migrates horizontal layer without accompanying vertical For controlled by index, governed supercritical gaseous characteristics. medium upward lateral characteristics plume determined smaller, key factor influencing Permeability decisive determining final This investigation reservoirs provides an effective reference for storage.