FORMATION WATER INFLOW SHUTOFF COMPOSITION

摘要

FIELD: oil and gas production. ^ SUBSTANCE: object of invention is to limit water inflow in injection well to increase oil recovery of formations. Composition according to invention containing clay (0.1-0.6%), biopolymer (0.1-0.25%), and water further contains 0.2-0.5% of polyacrylamide modified by a radiation-chemical method, said biopolymer being xanthan gum produced by bacterium strains Xanthomo and Campestrin in a hydrocarbon medium. ^ EFFECT: improved quality of grouting composition and achieved high grouting characteristics. ^ 1 tbl