METHOD FOR INTENSIFICATION OF OIL PRODUCTION Russian patent published in 2023 - IPC E21B43/22 E21B43/25 

FIELD: oil industry.

SUBSTANCE: invention is related to intensification of oil production in difficult geological and technological conditions. The method for intensification of oil production includes additional drilling of the formation, taking into account its structure, with radial channels from the main wellbore, hydraulic fracturing of the formation using fracturing fluid, proppant slurry and displacement medium, creating main fractures at the rate of injection of fracturing fluid into the well and its displacement into the formation, ensuring rock fracturing, the use of a hydraulic fracturing assembly and two packers that seal the annular space on the reservoir level in the main wellbore. After the formation is drilled with radial channels, chemical technological agents are pumped into them and, due to the chemical reaction of the reagents a pilot gas-hydraulic fracturing of rocks is created at a given location in the formation. A horizontal network of radial channels drilled from a common network entry into the main wellbore is used. Network entry, the horizontal network of radial channels and adjacent permeable rock pores associated with this entry are hermetically connected with the help of packers and annular space to the inter-packer outlet of the flow hydraulic pulsator installed in the hydraulic fracturing assembly at the formation level. Process agents are pumped into the well using a circulation valve located above the packers and controlled by the axial movement of the hydraulic fracturing assembly. Hydro-pulse squeezing of process agents into the formation is carried out using a hydraulic pulsator turbine, which periodically closes the bypass hole in the hydraulic fracturing assembly below the circulation valve. Hydro-pulse squeezing of process agents into the reservoir is carried out sequentially, without changing the position of the hydraulic fracturing assembly relative to the network inlet and the horizontal network of radial channels, in a single cycle, and is accompanied by an increase in the squeezing pressure at the inter-packer outlet of the hydraulic pulsator until the opening of the horizontal main fracture in a given reservoir location.

EFFECT: increase of drainage capacity, deposit coverage by impact and intensification of production and depletion of oil reserves in difficult geological and technological conditions.

1 cl, 2 dwg