FIELD: oil and gas industry.
SUBSTANCE: method for pulse-wave treatment of a productive formation involves excitation in a liquid flow of periodic stalling cavitation. An additional near-axial cavitation cavity is created prior to stalling cavitation by liquid flow swirling. A device for pulse-wave treatment of the productive formation includes inlet and outlet pipelines, a Venturi tube and a resonator. A swirling chamber is installed at the Venturi tube inlet. The resonator is located at the end of the outlet pipelines and it has a straight-flow design in the form of a metal ring with metal rods located parallel to the device axis. With that, the device for pulse-wave treatment of the productive formation is cyclically moved from the roof of the productive formation to the bottom of the formation and back to the roof of the formation.
EFFECT: improving treatment efficiency of a bottom-hole zone of the formation and improving operating reliability of the device.
4 cl, 4 dwg
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