FIELD: oil and gas industry.
SUBSTANCE: invention relates to limitation of water influx in production wells, and can be used for alignment of injectivity profile and insulation of washed zones of injection wells. Backfill composition for isolation of water influxes into well, containing sodium silicate, ethyl acetate, water and surfactant, further contains an additive - monoethanolamine, and as surfactant - hydroxyethylated monoalkyl phenol based on propylene trimers in following proportions, wt%: sodium silicate with pH 9.5-11.5 and silica modulus 3.5-5 100, water 100, ethyl acetate 5-10, oxyethylated monoalkyl phenol based on propylene trimers 1, monoethanolamine 0.8-1.2.
EFFECT: longer time of gel-forming composition, which provides high efficiency and quality of isolation of water inflow.
1 cl, 1 tbl
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