模拟高温高压气井环境中HP2-13Cr的点蚀行为研究  

Pitting Behavior of HP2-13Cr in Simulated High Pressure and High Temperature Gas Well Environment

作　　者：雷冰[1] 马元泰[1,2] 李瑛[1] 王福会[1] 常泽亮[2] 谢俊峰[2] 宋文文[2] 周理志[2] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016 [2]中石油塔里木油田油气工程研究院,库尔勒841000

出　　处：《腐蚀科学与防护技术》2013年第2期100-104,共5页Corrosion Science and Protection Technology

摘　　要：采用光学显微镜、扫描电子显微镜研究了HP2-13Cr油管钢在模拟高温高压气井环境中(酸化→返排残酸→采出水)点蚀行为的发展变化。结果表明:HP2-13Cr在服役过程中的点蚀主要在返排残酸阶段产生,残酸是引起HP2-13Cr点蚀的主要原因;统计了不同阶段点蚀坑深度的发展,得到返排残酸期间点蚀速率为7.56 mm/a,采出水期间点蚀发展速率为0.47 mm/a。点蚀坑深度的统计规律符合Gumbel分布,点蚀坑呈浅碟型。The pitting behavior of HP2-13Cr in a simulated high pressure and high temperature gas well environment （including three pericds： acidizing→retumed residual acid→ produced water） was investigated by OM/SEM observation. The results showed that the pitting was mainly occurred in the returned residual acid; the statistical analysis of the depth distribution of pits showed that the pitting rate in the period of returned residual acid was 7,56 mm/a, while 0.47 mm/a in the produced water. The depth distribution of pits followed Gumbel model and the shape of pits was shallow.

关 键 词：高温高压气井环境 油管钢 点蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]