Geochemical reactions are crucial for in situ CO 2 mineralization underground associated with CO 2 ‐enhanced oil recovery (CO 2 ‐EOR) in a hydrocarbon reservoir. However, the presence of formation water and adsorbed oil on rocks generates physical barriers to CO 2 's access to mineral surfaces, which may yield impedance to CO 2 mineral trapping that has yet to be accounted for. In this study, we mimic the dynamic oil detachment process using molecular dynamic (MD) simulation and analyze the influence of an adsorbed oil film on supercritical CO 2 (scCO 2 ) diffusion toward the mineral surface in the presence and absence of a water phase. Our results demonstrated a negative impact of water on oil film detachment by scCO 2 , which may weaken mineral reactions and is unfavorable for mineralized CO 2 storage underground.
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Yang et al. (2024) studied this question.
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