含杂CO2 封存条件下13Cr和N80套管钢腐蚀规律研究

doi:10.11902/1005.4537.2023.322

中国腐蚀与防护学报

2024, Vol. 44

Issue (5): 1200-1212 CSTR: 32134.14.1005.4537.2023.322 DOI: 10.11902/1005.4537.2023.322

研究报告

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含杂CO₂ 封存条件下13Cr和N80套管钢腐蚀规律研究

刘广胜¹^,², 王卫军¹^,², 周佩¹^,², 谭金颢³^,⁴, 丁宏鑫³^,⁴, 张伟³^,⁴, 向勇³^,⁴(

)

1 长庆油田分公司油气工艺研究院西安 710018
2 低渗透油气田国家工程实验室西安 710018
3 中国石油大学(北京)机械与储运工程学院北京 102249
4 中国石油大学(北京) 低碳能源装备材料失效与保护实验室北京 102249

Corrosion Behavior of Casing Steels 13Cr and N80 During Sequestration in an Impure Carbon Dioxide Environment

LIU Guangsheng¹^,², WANG Weijun¹^,², ZHOU Pei¹^,², TAN Jinhao³^,⁴, DING Hongxin³^,⁴, ZHANG Wei³^,⁴, XIANG Yong³^,⁴(

)

1 Changqing Oilfield Company Oil and Gas Technology Research Institute, Xi'an 710018, China
2 National Engineering Laboratory of Low Permeability Oil and Gas Fields, Xi'an 710018, China
3 School of Mechanical and Storage Engineering, China University of Petroleum (Beijing), Beijing 102249, China
4 Laboratory for Materials Failure and Protection of Low Carbon Energy Equipment, China University of Petroleum (Beijing), Beijing 102249, China

引用本文:

刘广胜, 王卫军, 周佩, 谭金颢, 丁宏鑫, 张伟, 向勇. 含杂CO₂ 封存条件下13Cr和N80套管钢腐蚀规律研究[J]. 中国腐蚀与防护学报, 2024, 44(5): 1200-1212.
Guangsheng LIU, Weijun WANG, Pei ZHOU, Jinhao TAN, Hongxin DING, Wei ZHANG, Yong XIANG. Corrosion Behavior of Casing Steels 13Cr and N80 During Sequestration in an Impure Carbon Dioxide Environment[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(5): 1200-1212.

全文: PDF(28197 KB) HTML

摘要:

井筒屏障金属材料腐蚀失效是影响碳封存安全性的关键问题。针对高温高压含杂CO₂封存环境下井筒套管腐蚀规律问题，利用高温高压反应釜模拟封存条件下的井下工况，分别研究了N80及13Cr钢在不同压力、应力条件下含杂质(SO₂、NO₂和O₂)的超临界CO₂富水相中的腐蚀规律。本研究利用失重法得到腐蚀速率，并利用扫描电镜(SEM)、X射线衍射仪(XRD)和X射线光电子能谱仪(XPS)等对产物膜进行了表征分析。结果表明，N80钢的均匀腐蚀与点蚀速率均随着压力的升高而增大；压力对13Cr钢的均匀腐蚀影响不明显，但在压力为20 MPa时出现严重的点蚀现象；给试样施加拉应力后，随着应力的增加，N80及13Cr钢的腐蚀产物层均出现了不同程度的破损，但是基体表面未观察到裂纹生成。

关键词 ：超临界CO₂, 腐蚀规律, 应力腐蚀, CO₂封存

Abstract：

Corrosion of metallic materials, used as wellbore wall is a critical issue that influences the safety of carbon sequestration. This work focuses on understanding the corrosion behavior of casing steels in high-temperature and high-pressure CO₂ storage environments. Herein, the corrosion behavior of two steels N80 and 13Cr in supercritical CO₂-rich water phases containing impurities (SO₂, NO₂, and O₂) was investigated via a high-temperature and high-pressure reactor by various pressure and stress conditions, aiming to simulate the real service conditions of carbon sequestration. The corrosion rate of steels was determined with mass-loss method, while the films formed on the steel surface were characterized by means of scanning electron microscopy (SEM), X-ray diffractometry (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicated that increasing the pressure led to higher rates of uniform corrosion and pitting corrosion for N80 steel. However, the pressure had inapparent effect on uniform corrosion of 13Cr steel, although severe pitting corrosion was observed by pressure of 20 MPa. Furthermore, the applied tensile stress could induce damage of the corrosion product scales on both N80 and 13Cr steels to certain extent, nevertheless, no cracks were observed on the surface of the steel substrate.

Key words： supercritical CO₂ corrosion process stress corrosion CO₂ storage

收稿日期: 2023-10-12 32134.14.1005.4537.2023.322

ZTFLH:

TE980

基金资助:国家自然科学基金(52271082);北京市自然科学基金(2222074)

通讯作者: 向勇，E-mail：xiangy@cup.edu.cn，研究方向为碳捕集、利用与封存，腐蚀与防护

Corresponding author: XIANG Yong, E-mail: xiangy@cup.edu.cn

作者简介: 刘广胜，男，1966年生，本科，钻井工程高级工程师、长庆油田油气工艺研究院院总工程师

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https://www.jcscp.org/CN/10.11902/1005.4537.2023.322 或 https://www.jcscp.org/CN/Y2024/V44/I5/1200

表1 实验材料化学成分

图1 高温高压反应釜装置图

表2 压力组实验方案

表3 应力组实验方案

图2 120℃、不同压力条件下N80及13Cr钢在富水相中腐蚀72 h后的腐蚀速率

图3 120℃、不同压力条件下N80及13Cr钢在富水相中腐蚀72 h后腐蚀产物膜的表面形貌

图4 120℃、不同压力条件下N80及13Cr钢在富水相中腐蚀72 h后的截面形貌

图5 120℃、不同压力条件下N80及13Cr钢在富水相中腐蚀72 h后的点蚀速率

图6 120℃、不同压力条件下N80及13Cr钢在富水相中腐蚀72 h后的3D形貌

图7 120℃、不同压力条件下N80钢在富水相中腐蚀72 h后的XRD

图8 120℃、不同压力条件下13Cr钢在富水相中腐蚀72 h后的XRD

图9 120℃、不同压力条件下13Cr钢在富水相中腐蚀72 h后腐蚀产物膜中Cr、Fe、O的XPS谱

表4 120℃、不同压力条件下13Cr钢在富水相中腐蚀72 h后腐蚀产物膜的结合能

图10 120℃、20 MPa不同加载应力条件下N80及13Cr钢在富水相中腐蚀72 h的表面形貌

图11 120℃、20 MPa不同加载应力条件下N80及13Cr钢在富水相中腐蚀72 h去除产物膜后的表面形貌

图12 120℃、20 MPa不同加载应力条件下N80钢在富水相中腐蚀72 h后的3D形貌

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