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

FIELD: oil and gas production industry. SUBSTANCE: according to method, initially bottom-hole zones of oil bed around injection wells are subjected to treatment by concentrated sulfuric acid. Then bottom-hole zones of wells are treated by means of mud acid. Displacing agent is injected into oil bed until pressure in bed reaches initial value. After that, injection of displacing agent into oil bed is periodically stopped and renewed. Duration of injection half-cycle is determined according to corresponding formula. Then performed is process of injecting water into injection wells until pressure in oil bed reaches its initial value. EFFECT: high efficiency.