METHOD OF OIL POOLS DEVELOPMENT Russian patent published in 2000 - IPC

FIELD: methods of development of oil pools at late stage of development. SUBSTANCE: method may be used in development of oil pools with reservoirs nonuniform in section and separated by clay partings. Oil pool is drilled with injection and producing wells. Isolating compositions are injected into formation. Water inflows to producing wells are shutoff. Oil displacement front is equalized. Wells are shutdown for period required for redistribution of formation pressure. Isolating compositions are injected into injection wells which are shutdown before injection of isolating compositions for 10-15 days for reduction of pressure in the most permeable interlayers. EFFECT: higher efficiency of physico-chemical stimulation of formation with reduction of reagent consumption and active involving of low-drainable oil resources into development. 2 cl