Manipulation of surface charges of oil droplets and carbonate rocks to improve oil recovery.

ABSTRACT: This work investigates the effect of the surface charges of oil droplets and carbonate rocks in brine and in surfactant solutions on oil production. The influences of the cations in brine and the surfactant types on the zeta-potentials of both oil droplets and carbonate rock particles are studied. It is found that the addition of anionic and cationic surfactants in brine result in both negative or positive zeta-potentials of rock particles and oil droplets respectively, while the zwitterionic surfactant induces a positive charge on rock particles and a negative charge on oil droplets. Micromodels with a CaCO₃ nanocrystal layer coated on the flow channels were used in the oil displacement tests. The results show that when the oil-water interfacial tension (IFT) was at 10^-1</

SUBMITTER: Hou J 

PROVIDER: S-EPMC8282872 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature