METHOD FOR DEVELOPMENT OF NONUNIFORM OIL DEPOSIT Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: this can be used in development of oil deposit with nonuniform reservoir. According to method, working agent is pumped in through injection wells in cyclic mode of operation. In addition, periodically injected is solution of polymer. Oil is recovered from producing wells. In initial period injected through injection wells is polymer solution of maximal concentration under pressure which ensures injectability of highly producing wells. After that, pumped in through injection wells is polymer solution of lower concentration under working injection pressure. Determined is flooding increasing speed per each producing well. During idle period of injection wells, intensively recovered through producing wells at high flooding increasing speed is product subject to extraction. Application of aforesaid method increases oil recovery from deposit. EFFECT: higher efficiency.