Properties of CO₂ Foam Stabilized by Hydrophilic Nanoparticles and Nonionic Surfactants

Nanoparticles can improve the stability of CO2 foam and increase oil recovery during CO2 flooding in reservoirs. However, there are few reports in the literature concerning the synergistic effects of hydrophilic nanoparticles and nonionic surfactants on the stabilization of CO2 foam. In this study, the mechanism of the synergistic stabilization of CO2 foam by the nonionic surfactant C12E23 and hydrophilic T40 nanoparticles (SiO2) and the flow...