Study on Comprehensive Adjustment Method of Injection and Production After Optimal Reperforating of Water Drive

After the water drive well pattern of oilfield A cooperated with EOR for many times, the used reserves gradually decreased and the proportion of low-efficiency wells increased, which severely restricted the water drive development adjustment [1, 2]. In order to realize the full utilization of reserves and well resources, since 2020, SP reservoir combined with the evolution of stratigraphic well pattern of water drive well pattern has released the sealing potential of eight blocks that have finished EOR by means of reperforating, making good use of reserves. It is an urgent task to improve the relationship between injection and production, maintain the balance of formation pressure and effectively realize the transformation of flow field, alleviate the interlayer contradiction of various oil layers, improve the utilization degree, maximize the excavation of remaining oil in the well area for reperforating, and realize the replacement of water drive reserves [3]. Therefore, this paper focuses on the practice and research of the comprehensive adjustment method of injection-production system in the well area after reperforating. On the basis of improving the injection-production relationship, it strengthens the comprehensive treatment at both ends of injection-production, further promotes the precise water injection and accurate potential excavation, highlights the targeted adjustment of key areas and key well formations, and strives to excavate potential strata to adjust the remaining oil in the well area. It provides reference experience for subsequent adjustment of similar well area.