FIELD: oil and gas industry.SUBSTANCE: method for limiting water influx in a well involves portion pumping to the isolation interval of composition and gel-forming regulator. Composition contains hydrolysed polyacrylonitrile - 100 parts by volume, liquid glass - 20-50 parts by volume, polyacrylamide DP9-8177 - 50-100 parts by volume. Aluminium oxychloride in the amount of 200-300 parts by volume is used as gel-forming regulator.EFFECT: improving efficiency of waterproofing work owing to increasing the coverage range due to formation of polymer mass immediately at the isolation interval, as well as simplifying the method and its operability in fresh waters.

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