Capillary and viscous forces during CO2 flooding in tight reservoirs

In this study, the multiphase multicomponent Shan-Chen lattice Boltzmann method is employed to analyze impact of capillary force on oil-CO2-water fluid flow and enhanced oil recovery. Various sizes single throat are designed simulate interaction between displacing displaced phases as well their mechanical equilibrium. Several sensitivities taken into account, such wettability, miscibility, interfacial tension, pore aperture. Based objective reservoir conditions, supercritical CO2 an injection adopted study influence different displacement patterns equilibrium in both homogenous heterogeneous porous media, which recovery also quantitatively estimated. The results show that water-alternating-gas pattern reduces moving speed leading edge by increasing swept area residual oil, inhibits breakthrough effect gas, making it optimal terms degree production. Compared with patterns, water-alternatinggas highest, followed flooding after water flooding, lastly, continuous flooding. C ited as: Zhang, C., Q., Wang, W., Xie, Su, Y., Zafar, A. Capillary viscous forces during tight reservoirs. Capillarity, 2022, 5(6): 105-114. https://doi.org/10.46690/capi.2022.06.01