某单井管道失效原因分析
|
摘要
利用扫描电子显微镜(SEM)、能谱仪(EDS)和水介质模拟软件(OLI)等手段对单井管道出现的腐蚀失效问题进行了分析。结果表明:失效管道材质满足GB/T 699-2015的要求,管道内表面存在有由FeCO_3、CaCO_3等物质组成的腐蚀产物层,腐蚀产物的不均匀分布导致管道发生垢下腐蚀,并在CO_2-H_2S-Cl~-介质的促进作用下,导致管道腐蚀穿孔。建议定期开展清管作业,并使用配套的清管缓蚀剂进行防护。
An analysis on the corrosion failure of single well pipeline was conducted by some advanced measure techniques including scanning electronic microscopy( SEM),energy dispersive spectrometer( EDS) and OLI simulation software,and the main reasons of failure were defined. Results showed that the material of the single well pipeline met the requirements of GB/T 699-2015 standard. The corrosion products were composed of FeCO_3 and CaCO_3 on the inner surface of the pipeline. Unequally distributed corrosion products caused under-deposit corrosion,and further under the promotion of CO_2-H_2S-Cl~- medium,the perforation failure of the pipeline occurred. The pigging operation and the use of inhibitor were advised to prevent the inner corrosion.
An analysis on the corrosion failure of single well pipeline was conducted by some advanced measure techniques including scanning electronic microscopy( SEM),energy dispersive spectrometer( EDS) and OLI simulation software,and the main reasons of failure were defined. Results showed that the material of the single well pipeline met the requirements of GB/T 699-2015 standard. The corrosion products were composed of FeCO_3 and CaCO_3 on the inner surface of the pipeline. Unequally distributed corrosion products caused under-deposit corrosion,and further under the promotion of CO_2-H_2S-Cl~- medium,the perforation failure of the pipeline occurred. The pigging operation and the use of inhibitor were advised to prevent the inner corrosion.
引文
[1]田嘉治,吕庆钢,羊东明,等.集输管内腐蚀失效原因分析[J].理化检验-物理分册,2013,49(12):843-847.
[2]徐卫华,俞力,袁萍,等.陈堡油田回注污水Ca CO3结垢预测及实测[J].油田化学,1999(4):326-328.
[3]于湉,常炜,路民旭.某湿气海底管道内腐蚀防护措施探讨[J].全面腐蚀控制,2010,24(3):32-35.
[4]冯蓓,杨敏,李秉风,等.二氧化碳腐蚀机理及影响因素[J].辽宁化工,2010,39(9):976-979.
[5]赵伟,于会景.高含硫气田管道腐蚀原因分析与防护措施[J].化学工程与装备,2010(3):66-67.
[6]胡丽华,常炜,余晓毅,等.CO2分压对碳钢海底管道CO2/H2S腐蚀的影响[J].表面技术,2016,45(5):56-61.
[7]张国礼,秦立峰,张峙,等.某海底管道失效分析[J].西安石油大学学报(自然科学版),2013,28(1):98-101.
[8]贾恒磊,赵春平,汪浩,等.管线的氧浓差电池现象[J].管道技术与设备,2012(3):51-52.
[9]张登庆,胡宏萍.集输管线垢下腐蚀的闭塞效应研究[J].油气田地面工程,2002(5):15-16.
[10]朱元良.碳钢垢下腐蚀行为与缓蚀机理研究[D].武汉:华中科技大学,2008:1-3.
[2]徐卫华,俞力,袁萍,等.陈堡油田回注污水Ca CO3结垢预测及实测[J].油田化学,1999(4):326-328.
[3]于湉,常炜,路民旭.某湿气海底管道内腐蚀防护措施探讨[J].全面腐蚀控制,2010,24(3):32-35.
[4]冯蓓,杨敏,李秉风,等.二氧化碳腐蚀机理及影响因素[J].辽宁化工,2010,39(9):976-979.
[5]赵伟,于会景.高含硫气田管道腐蚀原因分析与防护措施[J].化学工程与装备,2010(3):66-67.
[6]胡丽华,常炜,余晓毅,等.CO2分压对碳钢海底管道CO2/H2S腐蚀的影响[J].表面技术,2016,45(5):56-61.
[7]张国礼,秦立峰,张峙,等.某海底管道失效分析[J].西安石油大学学报(自然科学版),2013,28(1):98-101.
[8]贾恒磊,赵春平,汪浩,等.管线的氧浓差电池现象[J].管道技术与设备,2012(3):51-52.
[9]张登庆,胡宏萍.集输管线垢下腐蚀的闭塞效应研究[J].油气田地面工程,2002(5):15-16.
[10]朱元良.碳钢垢下腐蚀行为与缓蚀机理研究[D].武汉:华中科技大学,2008:1-3.