METHOD OF DEVELOPMENT OF NONUNIFORM-ZONE OIL FIELD Russian patent published in 1999 - IPC

FIELD: development of oil fields; applicable on deposits with nonuniform-zone formations. SUBSTANCE: method includes drilling of deposit by pattern of producing and injection wells, introduction of additional injection wells in formation low-permeable zone, cyclic injection of water by periodic operation of well cluster pumping plant. Distinguishing feature of claimed method is that time of injection cycle of well cluster pumping plant is preset on the basis of conditions at which formation pressure in highly permeable zone of formation does not exceed that in low-permeable zone of formation . During the period of stopping of water injection, hollows of distributing pipelines are disconnected. EFFECT: increased sweep of low-permeable zone of formation with water-flooding. 3 dwg