FIELD: oil production industry. SUBSTANCE: this relates to methods of selective isolation of water-saturated intervals of bed, and also to methods used for isolation of absorbing beds during drilling of bore-holes when beds contain heavily mineralized water. According to method, injected into water-permeable bed is water solution of sodium polysilicate. Used as sodium polysilicate is polysilicate with silicate modulus of sodium equal to 4.2-6.5 and concentration of 1-10 mass%. Application of aforesaid method simplifies isolating procedure and results in high efficiency. EFFECT: higher efficiency. 1 tbl
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