FIELD: oil and gas industry.
SUBSTANCE: method is carried out in formations with a low permeability. The initial permeability of the formation is less than 10 mD. A pair of electrodes is set. Various voltages are supplied between pairs of electrodes of specified frequency. In this case, the potential difference is more than at least 10000 V. The potential difference between the pairs of electrodes is provided by pulses of less than 500 ns duration with the formation of plasma discharges. Rock mass is removed between electrodes to reduce stress in formation by at least 5% of initial voltage in formation. Due to electric arc, rock is removed in local area with formation of channels.
EFFECT: increased permeability of formations.
18 cl, 5 dwg
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