METHOD FOR DEVELOPMENT OF NONUNIFORM OIL DEPOSIT Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: according to method, working agent is injected through injection wells and oil is recovered through producing wells. At first stage, working agent is injected simultaneously through injection wells in high permeable and low permeable zones of deposit at injectivity pressure of bed in high permeable zone and at oil recovery producing wells until reaching bed pressure in low permeable zone equal to 65-75% of initial bed pressure. At second stage, used is separated injection of working agent and operation mode of wells in high permeable zone is maintained, when working agent is injected through injection wells of low permeable zone at pressure increase of 1.4-1.6 times until initial bed pressure is reached. EFFECT: high efficiency.