FIELD: oil and gas production. SUBSTANCE: composition contains, wt %: condensed sulfite-alcohol dregs or lignosulfonate 0.6-1.2, polyacrylamide 0.75-1.5, sodium or potassium bichromate 0.225-0.45, gas 0.0125-0.125, and water - the balance. Composition can be used in production wells for insulation of gas-bearing part of productive stratum from oil-bearing one or in injector wells for insulation of oil-bearing part of stratum from water-bearing one. EFFECT: increased penetration capability of composition at pressure in insulation operation zone lower than composition injection pressure, and improved plugging properties due to increased limiting shear strain and kinematic viscosity. 1 tbl
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