METHOD FOR DEVELOPMENT OF MULTIPLE BED OIL DEPOSIT Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: according to method, working agent is injected through injection wells. Recovery of oil from beds is effected through producing wells. Deposit is divided into lower, middle and upper objects of development. Middle object is developed at natural mode until bed pressure is reduced by 14-16%. Then middle object of development is transferred from natural mode to watering mode. Used as working agent is accompanying water in mode of maintaining current bed pressure and at ratio of volumes of injection and recovery of liquid up to 100%. Upper and lower objects are developed in mode of maintaining bed pressure up to watering of recovered product to 85-95%. Then used as working agent is accompanying water with reduction of volume of injected working agent by 10-20%. EFFECT: high efficiency.