FIELD: oil-producing industry.
SUBSTANCE: invention relates to the oil-producing industry and can be used to regulate the profiles of injectivity of injection wells. Disclosed is a composition for flow-leveling works in injection wells, containing technical lignosulfonates, an aqueous solution of hydrochloric acid with a concentration of 12%, magnesium chloride hexahydrate, polyacrylamide and water with the following ratio of components, wt.%: technical lignosulfonates - 27-38; an aqueous solution of hydrochloric acid with a concentration of 12% - 2.7-26.7; magnesium chloride hexahydrate - 8-15; polyacrylamide - 1.3-4.5; water is the rest.
EFFECT: invention is aimed at increasing the blocking ability of the composition for highly permeable rocks by increasing the filtration resistance after gelation.
1 cl, 9 dwg, 3 tbl
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