FIELD: oil and gas production industry, particularly devices to remove water from gas, gas condensate and oil wells, as well as to stimulate reservoir fluid inflow and to clean well bottom zone of contaminants.
SUBSTANCE: method involves introducing self-generating foaming composition shaped as solid explosive blocks of two different compositions to well bottom, wherein the first explosive block is based on alkali metal nitrite base, another explosive block is based on sulfanic acid. Explosive blocks of both types include nonionic surfactant and filler, namely sodium chloride or potassium chloride taken in amount providing at least 1.8 g/cm3 block density. From stoichiometric condition 1.14 or 1.4 parts of sulfanic acid in the second block type is taken per 1 part of alkali metal nitrite in the first block type.
EFFECT: increased efficiency of fluid removal from well.
3 cl, 1 tbl, 7 ex, 1 dwg
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