Modeling Fine-scale Capillary Heterogeneity in Multiphase Flow of Co2 and Brine in Sedimentary Rocks
نویسندگان
چکیده
Experimental evidence by several groups, including ours, indicates that spatial variations in the capillary-pressure-saturation relationship can dominate the saturation distribution and transport dynamics of CO2-brine systems in natural porous media. The importance of such small-scale capillary heterogeneity depends strongly on the local balance of the viscous, buoyancy, and capillary forces. In this paper, a numerical scheme suitable for capillary heterogeneity simulations is studied. Several conceptual models, and a CO2 core flood experiment have been simulated by our in-house simulator. The results are consistent with the theory and experimental observations.
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