Interfacial mass transfer between scCO2water in porous media is a key process for dissolution and mineral trapping of CO2 during geological storage of CO2. Recently, both core- and pore-scale drainage and imbibition experimental studies have shown non-equilibrium dissolution of scCO2 and an extended depletion of residual scCO2 (Chang et. Al. 2016, 2017). For better understanding and quantifying the dissolution process of we need models to capture the rate-limited dissolution of scCO2 at the pore level. In this work, we develop a simulation model to capture two-phase flow and interfacial mass transfer at the pore-level. We used a continuum approach for interfacial mass transfer along with a phase-field method as an interface-capturing technique for the two-phase flow system. The model has been applied to a single pore for validation and subsequently to numerical simulation of 2D homogeneous micromodel experiments. The preliminary results show that the model can capture the mass transfer between the two phases and at the same time the interface adjustment.
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