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

FIELD: oil production industry. SUBSTANCE: method implies alteration of periods of injecting water into bed through injection well with simultaneous extraction of bed fluids through producing wells and periods of extracting bed fluids through producing wells at discontinuation of injecting water into injection well. Water injection with simultaneous extraction of bed fluids is carried out until reaching stable value of mineralizing produced water up to level of mineralizing injected water. Bed fluids are extracted at discontinuation of water injection which is carried out until reaching stable value of mineralizing recovered water up to level of mineralizing bed water. At reaching stable mineralization value of recovered water in different producing wells at different time, corresponding producing wells are closed until all remaining producing wells reach stable value of mineralizing recovered water. EFFECT: high efficiency. 1 cl, 2 tbl