山东科学 ›› 2018, Vol. 31 ›› Issue (4): 59-64.doi: 10.3976/j.issn.1002-4026.2018.04.010

• 新材料 • 上一篇    下一篇

烟道气驱油过程中N80钢的腐蚀敏感性研究

周迎梅   

  1. 中国石油大学胜利学院,山东 东营 257601
  • 收稿日期:2018-07-02 出版日期:2018-08-20 发布日期:2018-08-20
  • 作者简介:周迎梅(1982-),女,讲师,研究方向为重质油加工和油田化学研究。E-mail:zhouyingmei@slcupc.edu.cn

Sensibility study on the corrosion of N80 steel during the process of flue gas flooding

ZHOU Ying-mei   

  1. Shengli College,China University of Petroleum,Dongying 257601,China
  • Received:2018-07-02 Online:2018-08-20 Published:2018-08-20

摘要:

针对注烟道气驱油技术应用中烟道气对油井管柱的腐蚀问题,利用烟道气腐蚀测试装置模拟高温高压条件进行N80钢腐蚀实验,并利用灰色关联分析方法对烟道气腐蚀影响因素进行敏感性分析。结果表明,在模拟高温高压烟道气腐蚀环境下,温度低于60 ℃时,随着温度升高腐蚀速率变大,60 ℃时达到最大值;压力增大,腐蚀速率增大;流速和O2体积分数增加,腐蚀速率增加;随着SO2含量的增加,腐蚀速率呈现出先下降后升高的趋势;各因素对腐蚀速率的影响由大到小的排序为温度、O2体积分数、压力、SO2体积分数、NaCl质量分数、流速和NaHCO3质量分数。

关键词: N80钢, 敏感性, 烟道气, 腐蚀因素

Abstract:

As the technology of flue gas injection is increasingly used,severe corrosion arises in the flue gas injection wellbore. This paper conducted a study on the corrosion of N80 steel in high temperature and high pressure flue gas and used the grey correlation analysis method to analyze sensibility of N80 steel corrosion. The results show that corrosion rate rises with ascension of the temperature when temperature is lower than 60 ℃,and reaches the maximum at 60 ℃;With the pressure increases, the corrosion rate increases. With increasing in flow rate and oxygen content,the corrosion rate increases;With the increase of SO2 content,the corrosion rate shows a trend of increasing first and then rising. The order of the influence of each factor on the corrosion rate is temperature, oxygen content, pressure, SO2 content, NaCl content, velocity and NaHCO3 content.

Key words: corrosion factor, N80 steel, sensibility, flue gas

中图分类号: 

  • TE357.45