Anionic surfactants which include petroleum sulfonates, alkylbenzene sulfomates, petroleum carboxylates and ligin sulfonates, in which sulfonate surfactant is the most well known type are widely used in EOR.

• 阴离子型表面活性剂在三次采油中应用最为普遍，它们主要包括石油磺酸盐、烷基苯磺酸盐、石油羧酸盐、木质素磺酸盐等，而其中以磺酸盐型最多。