METHOD OF FORMATION GEOMECHANICAL IMPACT Russian patent published in 2019 - IPC E21B43/26 E21B43/18 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry and can be used to improve the efficiency of oil production from low-permeable reservoirs in the development of oil fields or oil rims. Aim of the invention is the creation due to the cyclic geomechanical impact on the reservoir system of multiple micro and macrocracks in the reservoir volume, increasing the productivity of production and injectivity of injection wells. This aim is achieved by creating a zone of secondary fracturing around the wellbore by cycling the formation. Each cycle consists of the stages of reducing the bottomhole pressure to the lowest technologically possible growth of the bottomhole pressure, closing the wellhead, forcibly increasing the bottomhole pressure by injecting gas into the well until the steady state achieves the technologically realizable maximum bottomhole pressure, maintaining the pressure, and reducing the pressure at the wellhead to atmospheric pressure. After the end of cycles of exposure, the well is put into operation under design conditions.

EFFECT: technical result is to increase the efficiency of oil production.

7 cl, 2 dwg