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The article describes the technology for creating a mobile viscoelastic waterproof screen in the well that uncovers an oilwater reservoir. There are three stages with the following ratio of components, mass. %, based on the completion at the boundary of the oilwater contact. The first portion of the composition is 1 % (wt.) uniflock solution + 5 % (wt.) CuSO4. Then the second portion of the composition is pumped in the following ratio of components, mass. %: 1 % (wt.) uniflock solution + 10 % (wt.) CuSO4 + ETS-32 (volume ratio ETS-32:CuSO4 = 0,33:0,17). At the final stage is the injection of the third portion of the composition in the following ratio of components, mass. %: 2 % (wt.) uniflock solution + 10 % (wt.) CuSO4 + ETS-32 (volume ratio ETS-32:CuSO4 = 0,33:0,17).

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