METHOD FOR DEVELOPMENT OF OIL FIELD WITH BOTTOM WATER Russian patent published in 1994 - IPC

FIELD: development of oil fields. SUBSTANCE: method consists in injection of solvent into formation during the entire main stage of development. Solvent is injected into zone of current water-oil contact through injection well at rate at which drainage area is covered by solvent for period of 1 month to 3 years. Solvent is additionally injected through producing wells. Injected simultaneously with solvent is heat carrier at temperature somewhat less than water boiling temperature at formation pressure. Two groups of wells are taken, injected through one of which is solvent in amount required for entire area of drainage of these groups of wells. EFFECT: higher efficiency. 8 cl, 3 dwg