添加Cr和Si对火驱N80碳钢注气井氧化行为的影响

doi:10.11902/1005.4537.2024.243

中国腐蚀与防护学报

2025, Vol. 45

Issue (1): 231-236 CSTR: 32134.14.1005.4537.2024.243 DOI: 10.11902/1005.4537.2024.243

研究报告

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添加Cr和Si对火驱N80碳钢注气井氧化行为的影响

范春华¹, 吴钱林¹(

), 薛山², 葛佳璐¹

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

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

FAN Chunhua¹, WU Qianlin¹(

), XUE Shan², GE Jialu¹

1 College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China
2 Zhejiang Wanfeng Light Alloy Research Institute Co., Ltd., Shaoxing 312500, China

引用本文:

范春华, 吴钱林, 薛山, 葛佳璐. 添加Cr和Si对火驱N80碳钢注气井氧化行为的影响[J]. 中国腐蚀与防护学报, 2025, 45(1): 231-236.
Chunhua FAN, Qianlin WU, Shan XUE, Jialu GE. Effect of Cr- and Si-addition on Oxidation Behavior of N80 Carbon Steel for Gas Injection Wells in Fire-flooding Oil Field[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(1): 231-236.

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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Fe₂O₃和(Fe, Cr)₃O₄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Cr₂O₃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。

关键词 ：高温氧化, 合金元素(Cr, Si), 氧化动力学, 火驱

Abstract：

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 ^oC in a laboratory made oxidation atmosphere, with the aim to simulate the combustion flame products during the oil field fire-flooding process 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 Fe₂O₃ and (Fe, Cr)₃O₄, 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 Cr₂O₃ 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.

Key words： high temperature oxidation alloying elements(Cr, Si) oxidation kinetics fire-flooding

收稿日期: 2024-08-06 32134.14.1005.4537.2024.243

ZTFLH:

TG172

通讯作者: 吴钱林，E-mail：wql_1978@163.com，研究方向为材料的腐蚀与防护

Corresponding author: WU Qianlin, E-mail: wql_1978@163.com

作者简介: 范春华，男，1975年生，高级工程师

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表1 4种实验钢的化学成分

图1 合金元素(Cr, Si)对N80碳钢的氧化动力学曲线的影响

图2 4种钢试样氧化240 h后表面的XRD图谱

图3 4种钢试样氧化240 h后表面与截面形貌以及对应能谱图

图4 5Cr，5Cr-Si和9Cr钢氧化240 h后氧化膜截面成分面扫描

图5 5Cr-Si和9Cr钢氧化240 h后氧化膜截面元素线扫描

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