FIELD: oil and gas production. SUBSTANCE: invention consists in that, when injecting into bed aqueous solution of polyacrylamide, aqueous solution of aluminum chloride and then aqueous solution of polyacrylamide together with chromium acetate are additionally injected. In another embodiment of invention, first injected are aqueous solutions of aluminum chloride, polyacrylamide, and aluminum chloride and then polyacrylamide together with chromium acetate, clayey suspension and finally polyacrylamide with chromium acetate. EFFECT: extended choice of materials for selective insulation of formation water permitting increased level of extra oil recovery. 4 cl, 1 tbl
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