TREATMENT METHOD OF PRODUCTIVE FORMATION, AND DOWNHOLE EQUIPMENT FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC E21B43/25 E21B28/00 

FIELD: oil and gas industry.

SUBSTANCE: treatment method of productive formation consists in a cyclically alternating operation of repression on the formation with pumping of process fluids to the formation and depression on the formation so that an influx is caused. Wave action with elastic vibrations on treated medium is performed with a hydrodynamic generator installed in the well opposite productive interval. Values and/or creation velocities of repression and depression are adjusted in cycles. Regular wave action controlled as per amplitude-frequency parameters is performed. Monitoring of running of filtration processes, decolmatation and fracture formation in formation medium is performed, on the basis of which control parameters, wave action parameters in further cycles of repression and depression and divider of those cycles as to time are determined and assigned in a feedback mode. Values and/or velocities of creation of repression and depression in cycles are controlled with their subsequent increase. Their initial minimum values are determined and assigned depending on filtration capacitance parameters of formation medium, and at the same time, hydraulic impact pressure pulses are created from time to time in the well fluid.

EFFECT: improving efficiency of action and directed conversion of rock medium of bottomhole area and formation, and enlarging functional capabilities of the device.

9 cl, 1 ex, 5 dwg