FIELD: oil producing industry, in particular, methods of shutoff of water inflow to oil producing wells. SUBSTANCE: method includes successive injection into well of aqueous solution of sodium silicate and 0.5-4-% solution of hydrochloric acid in highly-mineralized water with calcium chloride. In so doing, prior to injection, separating agent as light oil is injected. EFFECT: higher efficiency of method due to exclusion of premature mixing of injected reagents and provision of more reliable water barrier. 2 cl, 2 tbl
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