马25井区高压注水技术应用效果分析

Analysis of Application Effect of High-Pressure Water Injection Technology in Ma-25 Well Block

马25井区因地层物性差、储层敏感性强以及注水水质差等原因,造成部分注水井注水困难,表现为注水压力上升,吸水量下降或转注初期即注不进等。采用高压注水后,提高了难注井的注水量,改善了区块的开发效果,即:改善难注井注水状况,促进周围油井见效;改善注采矛盾,提高区块水驱开发效果;补充地层能量,促进地层压力的恢复。为确保井区开发效果,应在做好高压注水工作的基础上,进一步加强对储层伤害机理的研究以及对注入水水质的管理工作。

Poor physical property of formations,strong reservoir sensitivity and bad water injection quality in Ma-25 well block make water injection into some wells difficult.To ensure development effect,efforts should be made to adopt high-pressure water injection to increase water injection rate of hard injected wells,make injection and production more balanced to improve waterflooding results,supply producing energy to restore formation pressure and at the same time strengthen study of reservoir damage mechanism and management of water injection quality.