两种油管钢在模拟油田高温高压O2-CO2地层水环境中的腐蚀行为
Corrosion Behavior of Two Kinds of Tubing Steels in Simulated High Temperature and High Pressure O2-CO2 Formation Water Environment of Oil Field
宋文文 1谢俊峰 1赵密锋 1袁军涛 2冯文昊 3谭凤玲 3李轩鹏 2辛通 4张慧慧 5付安庆2
作者信息
- 1. 中国石油塔里木油田分公司,库尔勒 841000
- 2. 中国石油集团工程材料研究院有限公司油田钻采输送装备国家重点实验室,西安 710077
- 3. 中国石油集团工程材料研究院有限公司油田钻采输送装备国家重点实验室,西安 710077;陕西九州石油工程技术服务有限责任公司,西安 710075
- 4. 中国石油集团工程材料研究院有限公司油田钻采输送装备国家重点实验室,西安 710077;西安科技大学材料科学与工程学院,西安 710054
- 5. 西安科技大学材料科学与工程学院,西安 710054
- 折叠
摘要
氧气与二氧化碳共存环境的腐蚀已成为油田注入井况中金属材料损伤的主要诱因.采用高温高压釜模拟了西部某油田注入井工况(O2-CO2共存环境),通过腐蚀失重试验、点蚀三维形貌分析、腐蚀产物显微分析等方法研究了P110和3Cr两种油管钢在高温高压、O2-CO2共存的高矿化度地层水环境中的腐蚀行为.结果表明:两种油管钢在O2-CO2共存环境中遭受了严重的均匀腐蚀和局部腐蚀;在90～150℃内,两种材料的腐蚀随温度升高而加剧,均匀腐蚀速率增幅达79.7%,最大点蚀速率的增幅达143.4%;O2与CO2共存时,阴极反应显著加快,加速了保护性较差的铁氧化物的形成,导致严重的均匀腐蚀和局部腐蚀,而低Cr钢中的Cr不足以改善腐蚀产物膜的保护性,使该钢不能适应O2-CO2共存环境.
Abstract
The corrosion caused by the coexistence of oxygen and carbon dioxide has become the main cause of metal material damage in oilfield injection well conditions.The corrosion behavior of P110 and 3Cr oil pipe steels in a high salinity reservoir water environment with high temperature,high pressure,and O2-CO2 coexistence was studied by simulating the injection well operating conditions(O2-CO2 coexistence environment)in a western oilfield using a high temperature and high presure reactor.Corrosion weight loss testing,three-dimensional morphology analysis of pitting corrosion,and microscopic analysis of corrosion products were also conducted.The results show that the two types of oil pipe steels suffered severe uniform corrosion and localized corrosion in an environment where O2 and CO2 coexisted.Within the temperature range of 90-150 °C,the corrosion of the two materials intensified with increasing temperature,with a uniform corrosion rate increase of 79.7% and a maximum pitting corrosion rate increase of 143.4% .When O2 and CO2 coexisted,the cathodic reaction significantly accelerated,accelerating the formation of poorly protected iron oxides,leading to severe uniform corrosion and localized corrosion.However,the content of Cr in low Cr steel was not sufficient to improve the protection of the corrosion product film.So the low Cr steel could not adapt to the environment where O2 and CO2 coexisted.
关键词
注入井/O2-CO2共存/腐蚀/油管钢/局部腐蚀Key words
injection well/O2-CO2 coexistence/corrosion/tubing steel/localized corrosion引用本文复制引用
基金项目
中国石油天然气集团有限公司基础研究和战略储备技术研究基金(2022DQ032022Z-01)
中国石油天然气集团有限公司科技项目(2023ZZ11-02)
出版年
2024
NETL
NSTL
万方数据