摘要
针对壳牌长北气田水平分支井出现的钻杆腐蚀问题,现场测定钻井液中溶解氧含量和钻井液性能参数,分析钻井液中腐蚀成分。采用腐蚀环进行监测,测定腐蚀速率、分析腐蚀产物,确定钻杆主要腐蚀类型为钻井液中的Cl-和溶解氧协同作用引起的局部腐蚀。结合现场生产情况,建议定期向钻井液中添加高效除氧剂和缓蚀剂,控制钻井液pH值,有效减缓钻杆腐蚀。
For the problem of Shell Changbei horizontal multilateral well drill pipe corrosion, measured the dissolved oxygen content in drilling fluid and drilling fluid＇s performance parameters, analysed the corrosive components of the drilling fluid. Used corrosion ring to monitored corrosion, calculated the corrosion rate, analysed corrosion product, determined that drill pipe＇s corrosion types are localized corrosion caused by C1- and dissolved oxygen in the drilling fluid. Combined with on-site production, recommended that added efficient oxygen scavenger and corrosion inhibitor in the drilling fluid, controled drilling fluid pH, slow down the corrosion of drill pipe.
出处
《全面腐蚀控制》
2013年第1期54-56,67,共4页
Total Corrosion Control
关键词
钻杆腐蚀
腐蚀环
局部腐蚀
drill pipe corrosion
corrosion ring
localized corrosion
