FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry, in particular, to composition for isolating of water influx in production wells and regulating injection well water-intake capacity profile. Gelling composition contains 13–19.5 % by weight of sodium silicate, 1.6–2.2 % by weight of ammonium sulfate, 0.2–1.8 % by weight of sodium methylsiliconate and water with the remainder.
EFFECT: increase in the efficiency and manufacturability of the gel-forming composition by increasing its strength and the duration of gelation time at a low reservoir temperature.
1 cl, 1 ex, 1 tbl
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