FIELD: oil and gas industry.
SUBSTANCE: method for removing liquid from gas and gas-condensate wells involves introducing foaming composition to the well bottom in the form of two types of solid blocks, different in composition, the blocks of the first type contain, wt %: sodium Nitrite 70; sodium chloride 23; nonionic surfactant 5; polyanionic cellulose of high viscosity CMC 0.5; oil-soluble surfactant Sulfonol NP-1 1; complex Trilon B 0.5; the blocks of the second type contain, wt %: sulfamic acid 50; weighting agent- sodium chloride 43; nonionic surfactant 5; high-viscosity PAC 0.5; Sulfonol NP-1 1; Trilon B 0.5, wherein by stoichiometry per 1 part of sodium nitrite in the first step is 1.4 parts of sulfamic acid in the block of the other type.
EFFECT: effective lifting of well fluid from gas and gas-condensate wells.
2 cl, 1 tbl
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