METHOD FOR DEVELOPMENT OF INHOMOGENEOUS OIL DEPOSIT Russian patent published in 2016 - IPC E21B43/30 E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the petroleum industry. Method for development of inhomogeneous oil deposit comprises selecting on a deposit zones with different permeability, recovery of products through production wells, pumping working agent through injection wells and down-spacing. Zones of high and low permeability are selected. Injection wells are arranged on one side, and production wells - on other side from zone of low permeability. Down-spacing is performed by drilling an additional injection well near and opposite central part of low-permeability zone on side of producers. Working fluid is pumped through additional injection well in a continuous mode, producer, nearest to additional injection well, is stopped until formation pressure increases. Additional injection well is stopped, stopped production well is put into operation, and other production wells along zone of low permeability are stopped. Method then comprises waiting for recovery of formation pressure in section of high permeability by pumping injection wells, stopped producers are launched.

EFFECT: higher oil recovery of deposit.

1 cl, 1 dwg