Method for selectively plugging the more permeable regions of an underground formation having non-uniform permeability

摘要: A method for selectively plugging the more permeable regions of an underground formation having non-uniform permeability wherein a first surfactant solution is injected into in amount effective to contact substantial portion surface area highly formation, which characterized as selected chromatographic velocity and being capable reversibly adsorbing onto pores formation. After injecting solution, water-soluble spacer fluid sufficient place distant pre-injection viscosity about equal solution. space fluid, second higher than has composition such that it will be interacting physically with produce phase change so product interaction at least partially placed.