某注水井油管腐蚀穿孔失效分析  

Failure Analysis of Corrosion and Perforation of Oil Pipe of a Water Injection Well

作　　者：朱卫东 夏明磊 罗懿 朱凯通 姜磊 ZHU Weidong;XIA Minglei;LUO Yi;ZHU Kaitong;JIANG Lei(CNOOC(China)Co.,Ltd.,Tianjin Branch,Tianjin 300452,China;CNOOC(Tianjin)Pipeline Engineering Technology Co.,Ltd.,Tianjin 300452,China;Institute of Overall Safety Design of Offshore Oil Engineering Design Institute,Tianjin 300452,China)

机构地区：[1]中国海洋石油有限公司天津分公司,天津300452 [2]中海油(天津)管道工程技术有限公司,天津300452 [3]海油工程设计院工艺总体安全设计研究所,天津300452

出　　处：《理化检验（物理分册）》2020年第3期32-35,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某注水井油管发生腐蚀穿孔失效。通过宏观观察、化学成分分析、金相检验、能谱分析、X射线衍射分析、力学性能测试、细菌培养试验等方法对油管腐蚀穿孔失效的原因进行了分析。结果表明:硫酸盐还原菌和腐生菌的存在使溶液中SO42-被还原成H2S,H2S的存在引发了油管管壁的腐蚀,从而造成了油管腐蚀穿孔。油管的腐蚀类型为垢下微生物腐蚀。The tubing of a water injection well was corroded and perforated.The reasons for the failure of oil pipe corrosion perforation were analyzed by means of macroscopic observation,chemical composition analysis,metallographic examination,energy spectrum analysis,X-ray diffraction analysis,mechanical property test and bacterial culture test.The results show that the existence of sulfate reducing bacteria and saprophytic bacteria reduced SO42-to H2S in the solution.The existence of H2S led to the corrosion of the tubing wall,which resulted in the corrosion and perforation of the tubing.The corrosion type of oil pipe was microbial corrosion under scale.

关 键 词：注水井油管 腐蚀穿孔 微生物腐蚀 硫酸盐还原菌 腐生菌 

分 类 号：TG174[金属学及工艺—金属表面处理]