METHOD FOR DEVELOPMENT OF OIL DEPOSIT Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: this method can be used in development of oil deposit in cyclic mode. According to method, working agent is injected through injection wells and oil is recovered through producing wells. Selected in deposit is section with reduced oil saturation of bed and with increased degree of watering of recovered product in comparison with degree of watering at initially recovered reserve. In development section, cyclic operation mode of injection wells is effected with limiting injection volumes below volume of recovered liquid in section. Up to 30% of recovered product is redistributed from producing wells with watering above 60% to producing wells with watering below 60% with inducing recovery from low watered wells. Producing wells with watering above 96% located close to injection wells are started at moment of stopping injection wells and they are stopped at starting of injection wells. Producing wells with watering above 96% located in deposit are started and stopped according to start and stop of injection wells to reduce bed pressure and redistribute direction of flows of bed fluids. Development of section in steady state mode is continued up to reduction of bed pressure in development section with oil saturation above 0.55 until bed pressure is by 0.5-1.0 MPa is below initial pressure, and in development section with oil saturation below 0.55 - until bed pressure is by 2-4 MPa below initial pressure. EFFECT: high efficiency.