FIELD: oil and gas industry.
SUBSTANCE: after the first treatment of the bed by gas generator each next cycle of its hydro-breakdown is done simultaneously with high-energy impulse action of set amplitude and duration with the help of gas generator that is descended with geo-physical cable into bed interval before the beginning of hydro-breakdown and is switched on at reaching certain parameters of hydro-breakdown - pressure, pumping speed, volume of pumped fluid. Note that each cycle of treatment is finished by sudden pressure drop in the well to hydrostatic one after extraction of geophysical cable and unburned remnants of gas generator to the surface.
EFFECT: increase of permeability and gas recovery of methane-containing outburst-prone coal beds, reduction and uniform distribution of stresses in them, intensification of coal production.
4 dwg
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