METHOD FOR WATER DRIVE DEVELOPMENT OF OIL FORMATION WITH HIGHLY PERMEABLE RESERVOIRS IN FORMATION BOTTOM PART Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: at the beginning of development under the natural water drive conditions, product is withdrawn over entire section without injection of water into injection wells. After flooding of highly permeable reservoirs in formation bottom part equalling in thickness 0.2-0.3 of initial oil-saturated thickness, water is injected within limits of oil reservoir to formation bottom part, and beyond the contour zone, over the entire section. Formation fluids are wirhdrawn through producing wells perforated only in formation roof part. EFFECT: reduced water cutting of well production and increased oil recovery at reduced expenditures for water injections. 1 dwg