FIELD: chemistry.
SUBSTANCE: invention relates to compositions and methods which can be used to improve oil recovery. Disclosed is a composition which contains expandable cross-linked polymeric microparticles having an unexpanded volume average diameter of 0.05-5000 mcm and cross-linking agent content of 100-200000 ppm of hydrolytically labile silyl ester or silyl ether cross-linking agents. Also disclosed is a method of improving recovery of hydrocarbon fluids using said composition.
EFFECT: disclosed composition enables to block the pore throats of porous media and coverage of a reservoir for more complete oil recovery.
21 cl, 2 ex
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