Potential application of biosurfactants mixtures in high-temperature and high-salinity reservoirs

摘要

In this research, the interfacial behavior and emulsifying ability of bio-surfactants mixtures were evaluated to investigate the potential application in high-temperature and high-salinity reservoirs. Results indicated that the mixtures of biosurfactants and betaine 4# gave the lowest interfacial tension values of similar to 10(-3) mN/m and emulsified crude oil more effectively. Core flooding tests showed that the binary systems gave the highest oil recovery of 11%, which is more efficient than any single biosurfactant or chemical.