海外大型油田油水井钢管的腐蚀机理  

Corrosion mechanism of oil country tubular goods in large abroad oil fields

作　　者：杨朝晖[1,2] 于鸿江 李健[4] 黄涛[4] 郭勇[1,2] 李向阳[4] 

机构地区：[1]钢铁研究总院青岛海洋腐蚀研究所,山东青岛266071 [2]青岛钢研纳克检测防护技术有限公司,山东青岛266071 [3]中油国际曼格什套公司,哈萨克斯坦阿克套130000 [4]中国钢研科技集团有限公司钢铁研究总院,北京100081

出　　处：《钢铁研究学报》2015年第5期50-54,共5页Journal of Iron and Steel Research

摘　　要：针对卡拉姆卡斯油田油井管、套管的实际腐蚀情况,选取腐蚀失效的油水井井管进行了失效分析,研究了造成井管腐蚀失效的主要原因,并开展了模拟高温高压环境下的静态及动态试验。结果表明:腐蚀速率随温度的升高而增大;高压环境中的腐蚀速率大于低压环境中的腐蚀速率;在CO2腐蚀环境中,碳钢试样表面生成的腐蚀产物主要为有一定保护性的FeCO3膜,导致均匀腐蚀减弱,局部腐蚀加剧;流动介质会破坏附着在金属表面的腐蚀产物膜。在相似的环境条件下,动态条件下的腐蚀速率大于静态条件。According to the current corrosion situation of oil well pipe and casing pipe in Kalamkas oilfield, the oil and water well was chosen for analysis. In order to find the main corrosion failure reason for the tube well, static and dynamic tests were carried out in a simulated high temperature and high pressure environment. The investigation results indicate that as temperature rises, a higher corrosion ratio happens. Corrosion rate in a high-pressure environment is larger than that in a low-pressure environment. The existence of CO2 contributes to the protective corrosion product of FeCO3, therefore, the local corrosion ratio is increased, and then uniform corrosion ratio is decreased. The corrosion product film on metal surface might be damaged by flowing medium. In similar circum- stance, the corrosion ratio in the dynamic condition is higher than that in the static condition.

关 键 词：油田腐蚀 腐蚀机理 锈层形貌 模拟试验 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]