Features of nanoparticle composite-enhanced CO2 foam-flooding systems for low-permeability reservoirs

This study examined an enhanced foam-flooding system incorporating nanoparticles and polymers under geological conditions of a reservoir the Shu 16 block in Yushulin oilfield. The is mainly comprised anionic foaming agent (CQS-1) nonionic surfactant (FH-1). We screened 17 foams by evaluating their volumes foam half-lives using Waring-blender dynamic analysis methods, were selected after examining each foam’s concentration, ratio main to auxiliary agent, dosage stabilizer. Then, we analyzed system’s microstructure rheological properties, including adaptability its temperature resistance, salt tolerance, adsorption resistance. As result, this supports field application CO 2 flooding.