注水井多轮次酸化解堵技术研究  

The Reacidizing Technology Research For Injection Well

作　　者：杨永庆[1] Yang Yongqing(China Oilfield Services Limited,Tianjin 300452)

机构地区：[1]中海油田服务股份有限公司油田生产事业部,天津300452

出　　处：《石化技术》2023年第3期135-138,共4页Petrochemical Industry Technology

摘　　要：绥中36-1油田注水井多轮次酸化储层堵塞因素包括储层敏感性伤害、注水水质对储层的伤害、酸化和重复酸化对储层的潜在伤害。针对经过多轮次酸化的注水井,为降压增注采取深部酸化措施,通过溶蚀实验初步筛选出新型酸液体系即深度低伤害复合酸长岩心酸岩流动实验表明此酸液体系对多轮次酸化后的岩心渗透率恢复比较理想。并通过不同酸液体系对相同渗透率的长岩心进行深穿透能力实验比较,表明深度低伤害复合酸体系就有良好的深穿透性能。优选的深度低伤害复合酸体系应用于现场效果良好。The reservoir that is reacidized for several times plug causes include reservoir sensitivity damage,unqualified injection water damage and reacidizing damage.For the reacidized injection well,the deeply penetrative acidizing treatment should be performed.The deeply penetrative and low damage acid system is recommended elementarily according to the acid-cutting dissolving test.The acid-long core flow reaction proves that the acid system can recover the core permeability better for the reacidized core for several times.Through comparing the test result that different acid system penetrates the long core depth,the deeply penetrative and low damage acid system has the best deeply penetrative ability.The kind of acid system is applied for SZ36-1 oilfield injection well,the result is good.

关 键 词：绥中36-1油田 注水井 多轮次酸化 长岩心流动实验 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]