DEVELOPMENT METHOD OF LOW-PERMEABILITY RESERVOIR Russian patent published in 2020 - IPC E21B43/26 

FIELD: soil or rock drilling.

SUBSTANCE: invention can be used for development of low-permeability reservoirs, where drilling of horizontal wells with multistage hydraulic fracturing of formation (MHFF) is performed and it is necessary to maintain formation pressure. Method includes drilling of wells with horizontal section, multistage hydraulic fracturing of formation (MHFF) in horizontal sections of wells with arrangement of ports, determination of production well, in which watering of the product by more than 15 % per month, determination of pick-up on ports in at least one injection well adjacent to production well, in which watering of the product by more than 15 % per month, stopping the injection well, which resulted in production watering in the production well, cutting off at least one side barrel from the main borehole in this injection well, arrangement of ports in the side barrel of the injection well in zones closer to ports of the main hole of the injection well, at which intake capacity is less than 60 % of maximum intake capacity per one port of the main barrel of injection well, than to ports with capacity above said threshold, pumping of working fluid into side barrel of injection well at choke restriction or at stopping of main bore of injection well.

EFFECT: technical result consists in improvement of productivity of production wells with horizontal sections, in particular in increasing extraction of hydrocarbons (oil recovery) formations during development of low-permeability reservoirs.

15 cl, 7 dwg