FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry, in particular, to compositions for isolating water influx in production wells and injection wells and is designed for waterproofing operations in wells. Composition for isolating water inflow into the well comprises 2.8–13.5 wt.% of sodium silicate, 0.3–1.8 wt.% of chromium acetate, 0.3–0.7 wt.% of sodium silicofluoride as a gelling regulator and water – the balance.
EFFECT: technical result is the increased efficiency of water inflow insulation and increased technological possibilities of application thereof by extending the gelling time of the composition and reduced cost thereof.
1 cl, 1 tbl
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