METHOD OF NONUNIFORM FORMATION DEVELOPMENT

摘要

oil producing industry. SUBSTANCE: method is realized by injection of composition of mixture of aqueous solution of anionic polymer and salt of polyvalent cation. Aqueous solution of anionic polymer contains preliminarily cross-linked and strongly swollen but insoluble in water gel-particle dispersion and salts of polyvalent cation. Method provides for improvement of rheological and filtering properties of polymer systems deeply penetrating into formation and possessing selective action ensuring fuller isolation of water-encroached highly-permeable partings without reducing of permeability of oil-saturated part of formation. EFFECT: higher oil recovery from uniform formations and isolation of flooded wells. 4 cl, 3 tbl, 3 ex