HYDRAULIC FRACTURING METHOD WITH PRODUCTION AND INJECTION WELLS Russian patent published in 2023 - IPC E21B43/26 

FIELD: oil industry.

SUBSTANCE: method of hydraulic fracturing of a formation with production and injection wells includes running a pipe string with a packer into the production wellbore, closing the annular space above the roof of the productive formation, supplying hydraulic fracturing fluid through the pipe string with the introduction of proppant particles of the calculated fractional composition into it, creating excess pressure with the formation cracks, time delay. At that the injection of fluid into the injection well is stopped with subsequent restoration of pressure in the reservoir, hydraulic fracturing is performed in the production well, and then the fluid supply to the injection well is resumed.

EFFECT: increasing the efficiency of hydraulic fracturing by restoring the initial state of the formation isotropic in terms of horizontal stresses, which became anisotropic as a result of the operation of the injection well.

1 cl, 1 dwg