METHOD OF DEVELOPING OIL POOL AT LATE STAGE OF ITS OPERATION Russian patent published in 1998 - IPC

FIELD: oil-producing industry, more specifically, development of oil pools. SUBSTANCE: method includes drilling of intercrossing rows of injection wells to form closed contours of injection. Located within these contours are producing wells with establishment of withdrawal zones. Producing wells located between injection contour and withdrawal zone are operated periodically. At each period engaged in operation are those wells which are located in zone affected by shun-in for this period injection wells. Displacement agent is injected through injection wells and oil is withdrawal through producing wells. Injected to these wells, located between injection contour and withdrawal zone and featuring the limit rate of water encroachment, and to injection wells in zone affected by producing wells are chemical reagents increasing filtering resistance of highly permeable formation zones. EFFECT: redistributed filtering flows withdrawal of oil from zones weakly affected by stimulation and prevented premature water cutting of recovered products.