摘要
针对某油田油井套管破损严重的问题,对J55钢和3Cr、5Cr、9Cr和13Cr钢在含CO2油井模拟工况环境中的腐蚀速率进行了测试试验。结果表明:在模拟CO2腐蚀环境中,相对于J55钢,含Cr的合金钢腐蚀速率较低,且随着Cr含量的增大,腐蚀速率降低程度增大,Cr钢表面腐蚀产物膜表面Cr的富集程度增加,尤其13Cr最为明显,Cr的腐蚀产物主要为非晶态的Cr(OH)3。评价5种材质的耐蚀性能,为含CO2油井套管的选材提供理论依据。
Aiming at the serious damage of the oil well casing in a certain oilfield,the corrosion rates of J55 steel and 3Cr,5Cr,9Cr and 13Cr steel were tested in the simulated working conditions of CO2 containing oil wells.The results showed that in the simulated CO2 corrosion environment,the corrosion rate of chromium-containing alloy steel was lower than that of J55 steel,and the corrosion rate decreased with the increase of Cr content.The degree of Cr enrichment on the surface of Cr steel corrosion products was increased,especially 13Cr was the most obvious.The corrosion products of Cr were mainly amorphous Cr(OH)3.The corrosion resistance of the five kinds of materials was evaluated to provide theoretical basis for the selection of CO2 oil well casing.
作者
闫亚丽
YAN Yali(School of Material Science and Engineering,Xi’an Shiyou University,Xi’an 710065,China)
出处
《焊管》
2019年第5期30-36,共7页
Welded Pipe and Tube
基金
陕西省自然科学基础研究计划“高含H2S/CO2苛刻环境钛合金管材的耐蚀机理研究”(项目编号2016JM5064)
陕西省自然科学基金一般项目青年项目“Al掺杂FeMn/TiN纳米涂层的相变行为和强韧化机理研究”(项目编号2018JQ5108)
西安石油大学《材料科学与工程》省级优势学科(YS37020203)
关键词
腐蚀
套管破损
CO2腐蚀
J55钢
含Cr钢
耐蚀性
corrosion
casing damage
CO2 corrosion
J55 steel
Cr-containing steel
corrosion resistance
