FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry, in particular to compositions for isolation of water influx in production and injection wells, and is intended for performance of water shutoff works in wells. Composition contains 14–20 wt% sodium silicate, 0.3–1.0 wt% of chromium acetate, 0.5–1.5 wt% ammonium acetate and water – balance.
EFFECT: high efficiency of isolating water influx into the well due to wider range of gel formation of composition, possibility of its preparation at any time of year with simultaneous reduction of costs.
1 cl, 1 ex, 1 tbl
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