FIELD: oil and gas production. SUBSTANCE: invention aims at increasing oil recovery of non- uniformly permeable watered strata and solves this objective by increasing efficiency of composition owing to prevented adsorption of expensive polymer on the walls of pore channels, prevented precipitation of clay particles in high-permeation channels and fissures, and provided deep penetration of composition within formation zones affected by fresh and mineralized media with high concentration of clay constituent. Such composition contains, wt.%: carboxymethylcellulose, 0.1-1.0; soda ash, 0.1- 0.5; clay powder, 0.1-30; waste water with 100-150 g/l mineral components or fresh water, the balance. EFFECT: increased oil recovery. 1 dwg, 1 tbl
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