Cause of Corrosion on Sucker Rod of an Oil Well
摘 要
某油井抽油杆表面出现点状和坑状腐蚀现象,通过化学成分分析、金相检验、扫描电镜分析、能谱分析和离子光谱分析等方法,对抽油杆的腐蚀原因进行了分析。结果表明:该井采出液中水溶解氧及硫化氢含量较高,导致抽油杆发生了氧腐蚀和硫化氢腐蚀;氯离子含量较高加速了腐蚀反应的进行。
Abstract
Spot and pit corrosion was found on the surface of the sucker rod in an oil well. The causes of corrosion on sucker rod were analyzed by means of chemical composition analysis, metallographic examination, scanning electron microscope analysis, energy spectrum analysis and ion spectrum analysis. The results show that the high content dissolved oxygen and hydrogen sulfide in produced fluid of the well led to oxygen corrosion and hydrogen sulfide corrosion of sucker rod. The higher content of chloride ion accelerated corrosion reaction.
中图分类号 TG174.3+6 DOI 10.11973/lhjy-wl202011015
所属栏目 质量控制与失效分析
基金项目 国家自然科学基金资助项目(11802343),国家科技重大专项(2017ZX05009-003)
收稿日期 2020/4/14
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备注闫治涛(1971-),男,高级工程师,主要从事油气田压裂酸化工艺技术及低渗透油藏开发工程研究工作,yanzhitao.slyt@sinopec.com
引用该论文: YAN Zhitao,WANG Bingbing,ZHANG Yi,JIA Peng,XUE Shifeng. Cause of Corrosion on Sucker Rod of an Oil Well[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2020, 56(11): 62~65
闫治涛,王冰冰,张毅,贾朋,薛世峰. 某油井抽油杆腐蚀原因[J]. 理化检验-物理分册, 2020, 56(11): 62~65
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【5】张旺宁,王磊,刘西西,等.35CrMoA抽油杆失效原因分析[J].石油工业技术监督,2018,34(10):21-24.
【6】张刚刚,牛靖,宏岩,等.HY型抽油杆疲劳断裂原因浅析[J].热加工工艺,2018,47(6):257-260.
【7】陈汉,李晓明,黎平,等.HY型抽油杆应用性能分析与评价[J].石油机械,2017,45(11):99-104.
【8】WU S L, CUI Z D, HE F, et al. Characterization of the surface film formed from carbon dioxide corrosion on N80 steel[J].Materials Letters,2004,58(6):1076-1081.
【9】万里平,孟英峰,王存新,等.西部油田油管腐蚀结垢机理研究[J].中国腐蚀与防护学报,2007,27(4):247-251.
【10】ZHAO J M, LU Y, LIU H X. Corrosion and control of P110 oil tube steel in CO2-saturated solution[J].Corrosion Engineering, Science and Technology,2008,43(4):313-319.
【11】杨刚,梁根生,蔡洪.雅克拉-大涝坝凝析气田井下油管腐蚀分析[J].腐蚀与防护,2011,32(12):1001-1004.
【12】羊东明,李亚光,张江江,等.大涝坝气田油管腐蚀原因分析及治理对策[J].石油钻探技术,2011,39(5):82-85.
【13】赵映辉,唐永槐,吕拴录,等.φ73. 02 mm×5. 51 mm P110油管腐蚀原因分析[J].钢管,2016,45(1):59-63.
【14】XIAO R, XIAO G, HUANG B, et al. Corrosion failure cause analysis and evaluation of corrosion inhibitors of Ma Huining oil pipeline[J].Engineering Failure Analysis,2016,68:113-121.
【15】王建军,付太森,薛承文,等.地下储气库套管和油管腐蚀选材分析[J].石油机械,2017,45(1):110-113.
【16】单春艳,李春福,程力章.油田用抽油杆断裂分析[J].理化检验(物理分册),2008,44(4):203-205.
【17】蔡锐,赵金龙,吴鹏,等.L80油管螺纹接头腐蚀原因分析[J].理化检验(物理分册),2019,55(4):278-281.
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