METHOD OF LOCALIZED HYDRAULIC FRACTURING Russian patent published in 2025 - IPC E21B43/26 E21B43/30 E21B7/08 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used for intensification of oil and gas production from productive formations. Disclosed is a method for localized hydraulic fracturing, which consists in the fact that a hydraulic fracturing assembly with a hydraulic pulsator with a diverter consisting of two packers, an inter-packer port and a bypass hole is lowered into the well, after which the coiled tubing pipe and the hydraulic monitor controlled along the wire line are lowered through the deflector, which is made in the form of a curvilinear internal channel of the hydraulic pulsator with the output through the inter-packer port, then the packers are activated at the level of the formation roof and sidetracking from the main borehole of the network inlets to the formation oriented in the azimuthal direction, further, the formation is drilled out from the network inputs with mutually perpendicular vertical and horizontal networks of parallel radial channels, by rotation from the mouth of the hydraulic fracturing assembly with a deflector through a certain angle, after which the detachable turbine and the flow interrupter are lowered by the flow of circulating fluid into the hydraulic fracturing assembly until their tight fit in the upper part of the curved channel of the diverter opposite the bypass hole, then performing tight connection to inter-packer port of network inputs and networks of parallel radial channels and pulse pumping of agents into formation by means of turbine periodically closing bypass hole of hydraulic pulsator, whereby pilot cracks are created around radial channels using chemical agents taking into account permeability, further, for formation of hydraulic fractures, pulse injection of chemical agents into the formation is continued with pressure increase, at that, pumping pressure is increased twice, at first pressure is increased to the first level and vertical fractures of hydraulic fracturing are created and fixed with proppant, then, pressure is increased to a higher second level and horizontal fractures of hydraulic fracturing are created, which are also fixed with proppant.

EFFECT: increasing the intensity of action on the formation and its coverage with agents, recovery of the formation as a whole with simplification, improvement of reliability and efficiency.

1 cl, 8 dwg