凝析气田多相流环境下常用油套管钢的CO2腐蚀规律
CO2 Corrosion of Tubing and Casing Steel in Condensate Field in Multiphase Flow Environment
摘 要
针对凝析气藏CO2腐蚀工况,利用高温高压反应釜,进行了常用油套管钢N80、P110和3Cr在模拟凝析气田多相流环境中的动态腐蚀试验,研究了温度、CO2分压及含水率等因素对N80、P110和3Cr腐蚀速率的影响规律.用扫描电镜对腐蚀试样进行了表面形貌观察,对腐蚀产物进行了X射线衍射分析.研究结果表明,在CO2分压1.4 MPa,含水率30%的情况下,N80和P110的腐蚀速率随温度增加而减小,3Cr的腐蚀速率随温度增加先增后减:在60 ℃条件下,N80、P110和3Cr的腐蚀速率均随含水率和CO2分压的增加而增大:在模拟凝析气田多相流环境下,3Cr相对于N80和P110具有较好的耐蚀性.
凝析气田
CO2腐蚀
多相流
腐蚀速率
tubing and casing steel
condensate field
CO2 corrosion
multiphase flow
corrosion rate
Abstract
Corrosion behaviors of common tubing and casing steel were studied by tests in simulated environments of condensate field multiphase flow in high pressure autoclave.Effects of temperature,CO2 partial pressure and water content on corrosion behaviors of N80,P110 and 3Cr were analyzed by methods of corrosion weight loss,SEM and EDX.The results showed that with increasing of temperature when the CO2 partial pressure was 1.4 MPa and water content was 30%,the corrosion rate of N80 and P110 increased and the corrosion rate of 3Cr increased firstly and then declined.The corrosion rate of N80,P110 and 3Cr increased with increasing of water content and CO2 partial pressure at 60 ℃.In the simulated environment of condensate field multiphase flow,3Cr had better CO2 corrosion resistance than N80 and P110.
中图分类号 TG172.8
所属栏目 试验研究
基金项目 国家自然科学基金项目(No.50601029)
收稿日期 2010/1/5
修改稿日期 2010/5/16
网络出版日期
作者单位点击查看
备注陈立强,讲师.
引用该论文: CHEN Li-qiang,CHEN Chang-feng,LIU Rui-gang,JIN Yu-gang,XIA Jing-sen. CO2 Corrosion of Tubing and Casing Steel in Condensate Field in Multiphase Flow Environment[J]. Corrosion & Protection, 2010, 31(12): 929～932
被引情况:
【1】张玉成,屈少鹏,庞晓露,高克玮, "超临界CO2条件下钢的腐蚀行为研究进展",腐蚀与防护 32, 854-858(2011)
【2】刘飞,黄金营,夏成宇,周仕明,邓天安, "P110钢在不同温度含饱和H2S/CO2腐蚀溶液中的腐蚀行为",腐蚀与防护 37, 481-483(2016)
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【2】Heuer J K,Stubbins J F.Microstructure analysis of coupons exposed to C arbon dioxide corrosion in multiphase flow[J].Corrosion,1998,54(7):566-575.
【3】Mendez C,Duplat S,Hernandez S,et al.On the mechanismof corrosion inhibition by crude oils[C]//Corrosion,2001,Paper No.01030.
【4】姬鄂豫,李爱魁,张银华,等.原油对碳钢腐蚀行为影响的研究[J].材料保护,2004,37(5):42-44.
【5】张忠铧,孙中渠,黄子阳,等.经济型抗腐蚀油套管用低合金钢的研究[J].宝钢技术,2002(4):37-40.
【6】陈长风,赵国仙,严密林,等.含Cr油套管钢CO2腐蚀产物膜特征[J].中国腐蚀与防护学报,2002,22(6):335-338.
【7】李建平,赵国仙,王玉,等.塔里木油田用油套管钢的静态腐蚀试验[J].中国腐蚀与防护学报,2004,24(4):230-233.
【8】李全安,张清,文九巴,等.温度对油套管钢CO2腐蚀产物膜的影响[J].材料热处理学报,2004,25(1):79-83.
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