Experimental and Numerical Study on Optimizing CO₂ Foam-Assisted Gas Channeling Control in Tight Reservoirs: Geological Influences

Under the goal of carbon neutrality, CO2 foam flooding combined with the sequestration offers multibenefits for the development of low-permeability and tight oil reservoirs. However, its effectiveness is often hindered by severe gas channeling caused by foam instability and complex geological conditions. This study investigates the foam performance of two foaming agents inside tight porous media via core flooding tests, followed by reservoir-scale optimization studies of foam injection strategies, which are subsequently performed to assess the effectiveness of foam-assisted gas channeling control under different geological scenarios. The results elucidate the impact mechanisms of geological heterogeneity on the CO2 foam performance and provide theoretical and technical support for the integrated optimization of foam-based enhanced oil recovery and CO2 sequestration in low permeability and tight reservoirs.