Oil effect on CO2 foam stabilized by a switchable amine surfactant at high temperature and high salinity

Despite the possible detrimental effect of oil on foam displacement processes in CO2 EOR the effect of oil on dense CO2 foams has received little attention relative to air foams or low density CO2 foams. Herein, the effect of both a first contact miscible hydrocarbon (dodecane) and crude oil on CO2/water (C/W) foams generated by a switchable surfactant, C12–14N(EO)2 was examined at dense CO2 conditions at temperatures up to 120 °C (393 K) and...