METHOD AND DEVICE FOR FORMATION GEOMECHANICAL IMPACT Russian patent published in 2019 - IPC E21B43/26 E21B43/18 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the oil industry and can be applied to improve the efficiency of oil production from low-permeable reservoirs in the development of oil fields. This problem is solved by forming an area of secondary fracturing around the well bore by cyclically reducing and increasing the bottomhole pressure. Each cycle consists of the stages of creating the most technologically possible depression to the reservoir, maintaining at the bottom-hole pressure reached, blocking the well at the mouth for a period of 1–2 days, forcing the increase of the bottomhole pressure by pumping fluid into the reservoir until the technologically realizable maximum bottomhole pressure is reached, blocking the well at the mouth for 1–2 days. Water or water-based solution, for example, produced water, water from a water intake system from other horizons, water from external sources or prepared saline solution based on them, or degassed oil, or condensate, or diesel fuel is used as a fluid forcing agent. When well is inactive, the pressure dynamics in the well are recorded. Cycles are repeated until stable values of productivity or injectivity coefficients are achieved. After the exposure cycles are completed, the well is put into operation under design modes of production or injection. Simultaneously with the method proposed device for its implementation.

EFFECT: technical result is to increase the efficiency of oil production from low-permeable formations.

14 cl, 8 dwg