METHOD OF DEVELOPING LOW-PERMEABILITY OIL RESERVOIRS Russian patent published in 2016 - IPC E21B43/16 E21B43/267 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used in development of low-permeable oil deposit. According to the method working agent is pumped through injection wells. Oil is extracted through production wells and formation hydraulic fracturing is performed in wells. In low permeable reservoirs with permeability less than 1 ppm, the preferred fracture of hydraulic fracturing in length. That is ensured by the main hydraulic fracturing process with using small fractions of proppant size 30/60 mesh and less. Buffers of the liquid between the stages of proppant of not more than 10 t of 1.5-5 m³ on 1 t of proppant. Final concentration of proppant provide not more than 250 kg/m³. Fracturing fluid is used, without the gelling agent and containing a surfactant. When pumping of fracturing fluid flow rate is maintained 5.0 m³/min and more.

EFFECT: increased efficiency of hydraulic fracturing and increased oil recovery of oil deposit.

1 cl, 1 ex