METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2002 - IPC

FIELD: oil producing industry; applicable in development of oil pool with low-permeability nonuniform formation. SUBSTANCE: method includes injection of working agent through injection wells; withdrawal of oil through producing wells; changing over of water encroached producing wells into injection ones; oil withdrawal through producing wells; in this case, selected among reacting producing wells is the first reacted for injection by premature breaking through of injected water. Oil withdrawal from selected well is limited up to full shutdown of well. If reduction of encroachment of well with water is absent, well is changed over into injection one. Injection pressure into such a well and in injection well from which well is encroached with water is equalized. Withdrawal of oil from nearest producing wells is increased and injection of working agent is limited into injection well from which this wells is encroached with water. EFFECT: increased oil recovery from pool. 1 ex