FIELD: oil production industry. SUBSTANCE: this is used for levelling of injectivity front of injection and producing wells by reducing permeability of water-flushed zones of reservoir. Method implies successive injection of aluminium salt of sulfuric acid and calcium chloride which are interacting with creation of insoluble residue in porous space. Salts are injected at ratio of reagents 1-0.3-1.0. Method is realized by injection into reservoir of concentrated or weak solutions of salts. EFFECT: high efficiency. 1 cl, 2 tbl
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