摘要
某油田注水区块的内涂层防腐油管在油井下部发生严重腐蚀失效。为分析K1型涂层失效原因,取不同井深服役的内涂层防腐注水井油管,通过金相分析、腐蚀形貌观察,并结合能谱(EDS)和X射线衍射(XRD)等方法对取样油管进行了分析,确定了内涂层油管发生腐蚀的原因。结果表明,K1型涂层的抗热老化性能差是导致注水井油管涂层起泡和剥落失效的主要原因,进而使油管发生腐蚀失效。
The serious corrosion occurs on the inner coating tubing used in the lower part of water injection well. In order to analyze the failure reason of K1 coating,the different depth parts of the inner coating anticorrosion injection well tubing are taken to test. Through the metallographic analysis,observation of corrosion morphology,scanning electron microscopy（ SEM）,energy-dispersive spectroscopy（ EDS）,and X-ray power diffraction（ XRD）,the reason of the in-service inner coating tubing corrosion is determined. The results show that the poor thermal aging resistance of K1 coating is the main reason which causes the foaming and spalling failure of tubing coating in water injection well,and then further leads to the tubing corrosion failure.
作者
朱丽娟
冯春
路彩虹
蒋龙
袁军涛
徐欣
ZHU Lijuan;FENG Chun;LU Caihong;JIANG Long;YUAN Juntao;XU Xin(CNPC Tubular Goods Research Institute,State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials,Xi ＇an,Shaanxi 710077,China)
出处
《石油管材与仪器》
2018年第3期31-34,38,共5页
Petroleum Tubular Goods & Instruments
基金
中国石油天然气集团公司基础研究和战略储备技术研究基金项目"石墨烯技术在油管表面处理中的应用基础研究"(项目编号:2017Z-04)
关键词
温度
注水井
涂层
腐蚀
temperature
water injection wells
coating
corrosion
