METHOD FOR WATER INFLUXES SHUTOFF Russian patent published in 1995 - IPC

FIELD: oil producing industry. SUBSTANCE: method for water influxes shutoff includes cleaning of bottom-hole formation zone by injection of polymeric composition ADS based on complex compounds of oxyethylidenediphosphonic acid, composition DPF-1 diaminopropanol tetramethylphosphonic acid, hydrochloric acid, acetone, or methyl acetate fraction and corrosion inhibitor V-2. Injected successively by portions are isolating and structurizing compounds and spacer fluid for forcing each compound. Isolating compound is used in form of mixture of aqueous solutions of polymeric composition ADS water glass with concentration of 3-4% each with carbamide-formaldehyde resin with their ratio of 1:(0.5-2.0), respectively. Structurizing compound is used in form of 20-25% aqueous solution of polymeric composition ADS. Spacer fluid is used in form of mixture of aqueous solution of polymeric compositions ADS and water glass with concentration of 3-4% each. EFFECT: higher efficiency. 1 tbl