FIELD: oil and gas industry, particularly for well killing during underground repair and overhaul of wells in reservoirs having high permeability and in operating productive reservoirs, in the case of high well fluid absorption and high gas factor.
SUBSTANCE: well killing liquid includes product of polyacrylamide treatment with radiation and water. Solid powder water-free partially hydrolyzed polyacrylamide having particle dimensions of 0.1-5.0 mm is treated with 2.7-10 Mrad dose of ionizing radiation. Well killing liquid also includes lower alcohol selected from group involving mono-, di- or tre-atomic alcohols and dispersed chalk or wood flour. Above components are taken in the following amounts (% by weight): above polyacrylamide product - 1.0-3.0, alcohol - 10.0-60.0, dispersed chalk or wood flour - 0.5-10.0, remainder is water.
EFFECT: reduced well killing liquid penetration in reservoir.
2 ex, 1 tbl
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