FIELD: oil-and-gas industry.
SUBSTANCE: composition comprises water, at least one water soluble foam make, i.e. silicon-containing ester contained in water and fluid other than water. Said water contains salt solution while fluid other than water contains liquid hydrocarbons. Stable foam is produced from waters by combining them with gas in the presence of hydrocarbon fluids with the help of above described foam maker. Fluid load is removed from gas well by injection therein of foam maker obtained as described above and removal therefrom of stable foam as it forms. Hydrofrac with the help of foam at drilling comprises injection of above described foam maker into well. Fluid formed are lifted to oil well surface by injection of said foam maker to be combined with well fluid. Invention is developed in dependent claims.
EFFECT: higher efficiency in the presence of great amounts of hydrocarbons.
23 cl, 7 tbl, 6 ex
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