FIELD: oil and gas industry.
SUBSTANCE: composition increasing hydrocarbon fluid extraction ratio from underground deposit includes at least two different types of highly cross-linked expansible polymer microparticles having different chemical structure and average diameter of non-increased particles from about 0.05 up to 5000 mcm. Content of cross-linking agents is from about 100 up to 200000 ppm of labile cross-linking agents and from 0 up to about 300 ppm of non-labile cross-linking agents. The above composition is pumped to underground deposit.
EFFECT: increasing insulation efficiency of thief zones.
20 cl, 1 tbl, 10 ex
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