FIELD: oil industry, development of inhomogeneous oil deposit. SUBSTANCE: oil in agreement with invention is recovered through production wells. Working fluid is pumped through injection wells. Suspension of water-soluble polymer in hydrocarbon liquid is injected into wells. Water-free oil is used to fill well before pumping suspension of water-soluble polymer in hydrocarbon liquid. First technological curing is conducted in the course of 20-30 h when gel of water-soluble polymer starts formation in pores of drowned part of pool. Volume of liquid equal to injected volume is extracted from well smoothly, in the course of 1.5-2.0 days. Second technological curing in the course of 20-30 h is conducted for final formation of gel of water-soluble polymer. Then well in put in production. EFFECT: increased recovery of oil from oil field thanks to stronger fixing of water-soluble polymer in pool.
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Authors
Dates
2001-10-20—Published
2001-02-26—Filed