METHOD OF DEVELOPING A LOW-PERMEABILITY RESERVOIR WITH ALTERNATE INITIATION OF AUTO-HYDRAULIC FRACTURES Russian patent published in 2021 - IPC E21B43/267 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, in particular to systems for the development of hydrocarbon deposits using the maintenance of reservoir pressure. The method includes carrying out a multistage hydraulic fracturing (MSHF) using a hydraulic fracturing fluid containing a proppant in at least two wells, the horizontal wellbores of which are located with an azimuth offset from 20 to 160 degrees relative to the direction of the maximum horizontal stress in the formation, and production; carrying out studies to determine the closure pressure in at least one well, which will be further used as an injection well; using at least one of the aforementioned wells as an injection well by injecting a working fluid into it with an excess of the injection pressure over the hydraulic fracturing pressure; ensuring the breakthrough of the working fluid from the injection well through at least one auto-hydraulic fracture into at least one well in production mode, production from the production well and shutdown of the injection well when the water cut in the production well reaches 60% to 90%; continuation of producing from the production well and registration of a decrease in bottomhole pressure in the injection well. When the closing pressure in the injection well is reached or lower, the previous four stages are repeated until at least one more auto-hydraulic fracture is activated in this injection well.

EFFECT: oil recovery factor of the developed formation increases with the simplification of the development method.

12 cl, 3 dwg