热采井中油套管钢的腐蚀行为
Corrosion Behavior of Oil Casing Steels in Thermal Recovery Well
陈毅 1张彬奇 1陈彬 1袁梦瑶1
作者信息
- 1. 中海石油(中国)有限公司天津分公司,天津 300459
- 折叠
摘要
采用高温高压反应釜模拟稠油热采CO2和H2S腐蚀环境,研究了热采井油套管钢110H、L80-3Cr、L80-9Cr和L80-13Cr在此环境中的腐蚀行为.结果表明,在单一 CO2腐蚀环境中,随着温度的升高,4种油套管钢的均匀腐蚀速率均增大,80 ℃时随着油套管钢中铬含量的增加,均匀腐蚀速率降低.在CO2和H2S共存腐蚀环境中,油套管钢的均匀腐蚀速率随CO2和H2S分压比p(CO2)/p(H2S)的变化呈现不同的规律:80 ℃时,随着p(CO2)/p(H2S)增大,110H和L80-3Cr的均匀腐蚀速率逐渐增大,而L80-9Cr和L80-13Cr呈现先增大后减小的趋势;150 ℃时,随着p(CO2)/p(H2S)增大,4种油套管钢的均匀腐蚀速率先增大后减小.在300 ℃和350 ℃的CO2和H2S共存腐蚀环境中,L80-9Cr和L80-13Cr的耐蚀性远远优于L80-3Cr和110H.
Abstract
The corrosion behavior of oil casing steels 110H,L80-3Cr,L80-9Cr and L80-13Cr was studied in CO2 and H2S environment of heavy oil thermal recovery simulated by high-temperature and high-pressure autoclave.The results show that the uniform corrosion rates of four kinds of oil casing steels increased with the increase of temperature in solo CO2 corrosion environment,and at 80 ℃ they decreased with the increase of Cr content in the oil casing steels.In the corrosion environment of CO2 and H2S coexisting the uniform corrosion rates of oil casing steels presented different rules with the change of CO2 and H2S partial pressure ratio p(CO2)/p(H2S).As the p(CO2)/p(H2S)increased at 80 ℃,the uniform corrosion rates of 110H and L80-3Cr increased gradually,but those of L80-9Cr and L80-13Cr firstly increased and then decreased.As the p(CO2)/p(H2S)increased at 150 ℃,the uniform corrosion rates of the all oil casing steels showed a tendency of first increase and then decrease.In the CO2 and H2 S coexisting environment at 300 ℃ and 350 ℃,the corrosion resistance of L80-9Cr and L80-13Cr were much better than those of L80-3Cr and 110H.
关键词
稠油热采/油套管/CO2/H2S腐蚀/气体分压比/腐蚀机理Key words
heavy oil thermal recovery/oil casing/CO2/H2S corrosion/gas partial pressure ratio/corrosion mechanism引用本文复制引用
出版年
2024
NETL
NSTL
万方数据