METHOD FOR WATERFLOODING OF LOW-PERMEABLE AND SUPER-LOW-PERMEABLE RESERVOIRS Russian patent published in 2021 - IPC E21B43/26 E21B43/17 

FIELD: oil industry.

SUBSTANCE: invention relates to development of oil and gas deposits and can be used in design and development of horizontal wells using multi-stage hydraulic formation fracturing—MHFF at sealing of horizontal wells with MHFF or drilling of offshoots—radial channels with horizontal section and MHFF. According to the method, the horizontal part of the production well is routed in the clay bed with ductility, providing protection of horizontal shaft from breakthrough in it of fractures of hydraulic fracturing of formation. Installation of horizontal part of injection well in productive formation is performed in parallel to horizontal part of production well. Ports are installed in the horizontal part of the injection well and multi-stage hydraulic fracturing of the formation is performed. Ports are installed in horizontal part of production well and performing multi-stage hydraulic fracturing of formation with provision of production well connection with productive formation or drilling of radial channels of production well with provision of connection of production well with productive formation. Ports are installed in horizontal part of production well. Perform multi-stage hydraulic fracturing of formation. Working fluid is pumped into injection well at pressure above formation hydraulic fracturing. Ports are installed in production well with offset relative to ports of injection well. Producing and injection wells are exploited by pumping liquid into injection well. Fluid is extracted from production well.

EFFECT: technical result is higher reliability of oil deposit development and increased oil recovery of formation.

9 cl, 1 tbl, 4 dwg