FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry, in particular, to compositions for isolation of water influx in producing and processing injection wells in order to equalize intake capacity profile. Composition contains 8.0–15.0 wt% sodium silicate, 85–92 wt% of fresh water, 0.3–0.8 wt% over 100 % of chromium acetate, and 0.5–2.0 wt% above 100 % sodium bicarbonate.
EFFECT: high efficiency of isolating water influx by creating a low-viscosity composition with controlled gelation time, penetrating into low-permeability pores of the collector, flooded with water of any mineralization, and high strength of the formed gel.
1 cl, 1 tbl
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