METHOD OF DEVELOPMENT OF MULTIFORMATION OIL POOL Russian patent published in 2000 - IPC

FIELD: oil producing industry. SUBSTANCE: method includes determination of development objects, drilling of producing and injection wells on determined development objects; injection of working agent through injection wells and oil withdrawal from producing wells. In opening of development objects, area development member are formed on each development object with displacement of wells pattern of one development object with respect to the other one. Working agent is injected separately through injection wells separately to each development object, and oil withdrawal through producing wells is carried out separately from each development object. At late stage of development, one part of producing wells of one development object are transferred to other development object with preserved separate injection of working agent and oil withdrawal on development objects. Selected first of all for transfer are inundated producing wells located from nearest producing wells with low inundation at distance exceeding the current radius of drainage and current production rate of less than 0.3 t/day and being inactive or under conservation. Further on, selected for transfer are similar inundated producing wells with production rate of less than 0.9 t/day. EFFECT: increased oil recovery from pool. 1 tbl, 1 ex