西南石油大学学报(自然科学版) ›› 1998, Vol. 20 ›› Issue (3): 72-74.DOI: 10.3863/j.issn.1000-2634.1998.03.020

• 化学工程 • 上一篇    下一篇

油井水泥腐蚀的能谱分析研究

廖刚1 杨远光2 陈大钧3
  

  1. 1.西南石油学院化学工程系,四川南充637001 2.石油工程系 3.化学工程系
  • 收稿日期:1998-02-20 修回日期:1900-01-01 出版日期:1998-08-20 发布日期:1998-08-20
  • 通讯作者: 廖刚

A Study of Corrosion of Oil Well Cement with Energy Spectrum Analysis

Liao Gang 1 Yang Yuan-guang 2 Chen Da-jun3   

  1. ( Dept. of Chemical Engineering, SWPI,Sichuan, 637001 )
  • Received:1998-02-20 Revised:1900-01-01 Online:1998-08-20 Published:1998-08-20
  • Contact: LiaoGang

摘要: 将水泥石在含有不同离子成份的腐蚀液中浸泡,用能谱仪测定了腐蚀后水泥石中各元素的含量。发现,氯离子、硫酸根离子能渗入到水泥石内部深处;在水泥浆中加入硅灰,这种作用明显减弱;在上述两种水泥石内部,镁离子的含量均无明显变化。指出,硫酸根离子在水泥石内的扩散不完全是物理扩散,也有化学扩散;要防止硫酸根离子的侵蚀,改变水泥水化产物的组成是关键;要防止镁离子的侵蚀,水泥石不应有缺陷。

关键词: 油井水泥, 腐蚀, 能谱, 分析

Abstract: Two samples of oil well cement ( one was added with silica fume and the other was not ) were soaked in aqueous solutions containing different ions, and
the resultant element concentrations within the sam-ples were determined with energy spectrometry. It was found that Cl - and SO42 - had seeped into
the cement while Mg2 + had not, and silica fume can hinder diffusion of the ions. It is pointed out in this paper that the diffusion of SO42 - ions within
the cement is not only a physical but also a chemical process. The key to prevent corrosion by SO42 - is to change the composition of the resulting hydrated product.

Key words: Oil well cement, Corrosion, Energy spec-trometry, Composition, Diffusion

中图分类号: