FIELD: oil and gas production. SUBSTANCE: nonexpensive liquid for killing oil wells is prepared from formation water with different mineralization containing plastering material - monosulfite lye, its content being calculated from empirical formula c = 32-20 ρ where r is density of formation water. Liquid provides acceptable water loss owing to formation of fluid sludge-like deposit on well bottom. EFFECT: reduced cost of killing liquid. 3 cl, 1 tbl
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