FIELD: oil producing industry, particularly, compositions applicable in regulation of profile of injection well injectivity and also for shutoff of water inflows to producing wells due to formation of sediments in water-permeable channels of formation. SUBSTANCE: water shutoff composition contains, wt. %: water glass 6.25-7.5; still bottoms of synthetic fat acids 4.2-5.5; the balance, water. EFFECT: increased water shutoff properties of composition due to sedimentation in formation water-permeable channels, extended base of chemical reagents for increase of oil recovery using production wastes. 2 tbl, 3 ex
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