FIELD: oil and gas industry.
SUBSTANCE: invention refers to methods of intensification of natural gas extraction from coal beds. Method consists in exposure of the bed to pressure pulses and in forming a cavity in the coal bed by means of cyclic increase and decrease of pressure of liquid in borehole. Also, as pressure pulses low frequency pressure pulses of high amplitude are employed. Exposure of the bed to low frequency pressure pulses of high amplitude is performed at increase of pressure of liquid in the borehole.
EFFECT: increased efficiency of natural gas extraction from coal beds due to exposure of bed to pressure pulses.
4 cl, 4 ex
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