FIELD: oil industry.
SUBSTANCE: invention relates to the petroleum industry. Method of secondary opening of productive layers, including the descent of the hydraulic punch into the hole in the tubing, perforating the production casing, perforation is performed by moving the hydraulic hammer up along the axis of the well and at the same time turning it around its own axis with a slicing screw slots. Speed of movement and rotation of the hydraulic punch are selected based on the conditions for obtaining a result of punching slots a helix with a pitch of 0.7 on the height of a cut gap, and closing these gaps in a single cavity in the bottomhole formation zone.
EFFECT: provides increased oil recovery through the fullest development of reservoirs in complicated geological conditions.
2 cl, 2 dwg, 2 tbl, 2 ex
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