Seclection of Tubing Materials for a Water Supply Well Containing Low CO2 in SZ36-1 Oilfield
摘 要
模拟SZ36-1油田某低含CO2水源井生产油管的现场环境,在高温高压釜中对5种油管材料N80钢、3Cr钢、13Cr钢、超级13Cr钢以及钨钢进行72 h腐蚀浸泡试验,确定油管材料的腐蚀速率,以比较各钢材的耐蚀性;采用光学显微镜观察试样腐蚀形貌,以评价各钢材的局部腐蚀情况;利用动电位极化曲线和电化学阻抗谱分析待选材料的电化学性能。结果表明:N80钢的腐蚀速率高达0.223 mm/a,表面有大量点蚀坑,其电化学腐蚀反应受阳极活化控制,并且阻抗最小,不满足选材要求;钨钢因其较差的耐点蚀性也不满足要求;3Cr钢、13Cr钢和超级13Cr钢的腐蚀速率低,具有显著的阳极钝化特征,耐点蚀性好,电化学阻抗高,可以满足选材要求。
Abstract
Corrosion immersion tests were performed for 72 h in a high temperature autoclave under a simulated condition of a water supply well containing low CO2 in the SZ36-1 oilfield for five kinds of tubing material, N80 steel, 3Cr steel, 13Cr steel, super 13Cr steel and tungsten steel. The corrosion rates obtained from corrosion immersion tests can be used to compare the corrosion resistance of the test steels. Corrosion morphology was observed by optical microscopy to evaluate localized corrosion situations for these steels. The electrochemical properties were analyzed by potentiodynamic polarization curves and electrochemical impedance spectrums. The results show that N80 steel cannot meet the requirements of material selection due to the high corrosion rate of 0.223 mm/a, a large number of pits on its surface, anodic activation controlling its electrochemical corrosion reaction and the smallest electrochemical impedance. Tungsten steel also cannot meet the requirements because of its poor resistance to pitting corrosion. 3Cr steel, 13Cr steel and super 13Cr steel had low corrosion rates, significant anodic passivation characteristics, good pitting resistance, high electrochemical impedance. So these steels can meet the requirements of material selection.
中图分类号 TG174.2 DOI 10.11973/fsyfh-201808012
所属栏目 应用技术
基金项目
收稿日期 2017/3/31
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: CHEN Huaxing,ZHAO Xuefen,LIU Yigang,PANG Ming,ZHAO Shunchao. Seclection of Tubing Materials for a Water Supply Well Containing Low CO2 in SZ36-1 Oilfield[J]. Corrosion & Protection, 2018, 39(8): 629
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】赵章明. 油气井腐蚀防护与材料选择指南[M]. 北京:石油工业出版社,2011:15-16.
【2】SCHMITT G. Fundamental aspects of CO2 metal loss corrosion. Part Ⅱ:Influence of different parameters on CO2 corrosion mechanism[C]//Corrosion 2015. Houston:NACE International,2015.
【3】寇杰,梁法春,陈婧. 油气管道腐蚀与防护[M]. 2版. 北京:中国石化出版社,2016:160.
【4】丁博钊,唐洪明,高建崇,等. 绥中36-1油田水源井结垢产物与机理分析[J]. 油田化学,2013,30(1):115-118.
【5】Preparation,installation,analysis,and interpretation of corrosion coupons in oilfield operations:NACE RP0775-2005[S]. Houston:NACE International,2005.
【6】曹楚南,张鉴清. 电化学阻抗谱导论[M]. 北京:科学出版社,2002:162.
【7】曹楚南. 腐蚀电化学原理[M]. 3版. 北京:化工出版社,2008:187-193.
【2】SCHMITT G. Fundamental aspects of CO2 metal loss corrosion. Part Ⅱ:Influence of different parameters on CO2 corrosion mechanism[C]//Corrosion 2015. Houston:NACE International,2015.
【3】寇杰,梁法春,陈婧. 油气管道腐蚀与防护[M]. 2版. 北京:中国石化出版社,2016:160.
【4】丁博钊,唐洪明,高建崇,等. 绥中36-1油田水源井结垢产物与机理分析[J]. 油田化学,2013,30(1):115-118.
【5】Preparation,installation,analysis,and interpretation of corrosion coupons in oilfield operations:NACE RP0775-2005[S]. Houston:NACE International,2005.
【6】曹楚南,张鉴清. 电化学阻抗谱导论[M]. 北京:科学出版社,2002:162.
【7】曹楚南. 腐蚀电化学原理[M]. 3版. 北京:化工出版社,2008:187-193.
相关信息