FIELD: oil producing industry. SUBSTANCE: compound contains, mass % : calcium chloride 3.0-14.0; carboxymethyl cellulose 0.5-2.0; disubstituted ammonium phosphate 5.0-18.0; alkylbenzene sulfonate 0.05-1.0, and water is the balance. Carboxymethyl cellulose is dissolved in water and let it stand for 24 h. Calcium chloride is added to half of said solution. Introduced into remaining part of carboxymethyl cellulose is disubstituted ammonium phosphate and alkylbenzene sulfonate. Solutions are combined with stirring. EFFECT: reliable isolation with preserved natural permeability.
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