FIELD: oil producing industry. SUBSTANCE: composition for restriction of influx of formation waters contains, mas.%: water-soluble inorganic sulfate 3-16; water-soluble silicon compound 0.1-3; the balance, water. The composition is injected into injection well. EFFECT: higher efficiency of the effect of the composition on water-washed intervals of oil formation and equalization of the injectivity profile of injection well due to introduction into sediment-forming composition containing water-soluble inorganic sulfate of water-soluble silicon compound. 3 cl, 1 tbl
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