Dissolved CO2 increases breakthrough porosity in natural porous materials

摘要: When reactive fluids flow through a dissolving porous medium, conductive channels form, leading to fluid breakthrough. This phenomenon is caused by the infiltration instability and important in geologic carbon storage where dissolution of CO2 flowing water increases acidity. Using numerical simulations with high resolution digital models North Sea chalk, we show that breakthrough porosity an indicator pattern. Dissolution patterns reflect balance between demand supply cumulative surface. The determined composition while relies on field rock’s microstructure. We tested three model scenarios found aqueous dissolves media homogeneously, large porosity. In contrast, solutions without develop elongated convective known as wormholes, low These different are explained ap...