添加Cr和Si对火驱N80碳钢注气井氧化行为的影响  

Effect of Cr-and Si-addition on Oxidation Behavior of N80 Carbon Steel for Gas Injection Wells in Fire-flooding Oil Field

作　　者：范春华 吴钱林 薛山 葛佳璐 FAN Chunhua;WU Qianlin;XUE Shan;GE Jialu(College of oCean Science and Engineering,Shanghai Maritime University,Shanghai 201306,China;Zhejiang Wanfeng Light Alloy Research Institute Co.,Ltd.,Shaoxing 312500,China)

机构地区：[1]上海海事大学海洋科学与工程学院,上海201306 [2]浙江万丰轻合金研究院有限公司,绍兴312500

出　　处：《中国腐蚀与防护学报》2025年第1期231-236,共6页Journal of Chinese Society For Corrosion and Protection

摘　　要：在模拟火驱的特殊氧化环境中,研究了Cr、Si对目前常用的N80碳钢注气井油管的氧化行为的影响。结果表明:3%Cr或5%Cr(质量分数)的加入可形成由Fe_(2)O_(3)和(Fe,Cr)_(3)O_(4)组成的厚氧化膜,且氧化膜发生严重剥落;0.5%Si和5%Cr同时加入不但明显提高抗氧化性能而且氧化膜的剥落被显著遏制;9%Cr加入形成保护性Cr_(2)O_(3)膜。同时加入0.5%Si和5%Cr钢的内层氧化膜中存在CrS,而加入9%Cr则未见CrS。Cr和Si的加入可明显提高N80碳钢注气井油管的抗氧化性能。The effect of Cr-and Si-addition on the oxidation behavior of N80 carbon steel for gas injection well tubing was investigated at 450-650 ℃ in a laboratory made oxidation atmosphere,with the aim to simulate the combustion flame products during the oil field fire-flooding prcoess is adopted for oil production.The results showed that the addition of 3%Cr and 5%Cr(mass fraction)respectively may facilitate the steel to form a thick oxide scale composed of Fe_(2)O_(3)and(Fe,Cr)_(3)O_(4),and the oxide scale underwent serious flaking,while the simultaneous addition of 0.5%Si and 5%Cr can not only improve the oxidation resistance of the steel but also significantly inhibit the flaking of the oxide scale,and the addition of 9%Cr may favor the formation of a protective Cr_(2)O_(3)scale.Furthermore,CrS was found in the inner oxide scale of the N80 steel with the simultaneous addition of 0.5%Si and 5%Cr,while no obvious CrS was found with the addition of 9%Cr.Therefore,the addition of alloying elements Cr and Si can significantly improve the oxidation resistance of N80 carbon steel tubing for gas injection wells.

关 键 词：高温氧化 合金元素(Cr Si) 氧化动力学 火驱 

分 类 号：TG172[金属学及工艺—金属表面处理]