Abstract:

Aiming at the corrosion problem of produced water in high CO₂ content oilfield, the corrosion behavior of carbon steel by S^2- produced by SRB propagation in produced water and S^2- carried by formation in development process were studied by corrosion electrochemical method. It was recognized that S^2- produced by SRB propagation and S^2- carried by formation in development process had little difference in effect on the corrosion behavior of carbon steel, a small amount of S^2- could inhibit the corrosion of carbon steel, but when the concentration of S^2- in sewage was more than 0.5 mg/L, S^2- promoted the corrosion with the prolongation of time.

Key words: S^2- concentration, corrosion behavior, sulfate reducing bacteria, characteristics of corrosion product film

摘要：

针对高含CO₂油田采出水的腐蚀问题，利用腐蚀电化学方法，分别研究了采出水中由硫酸盐还原菌（SRB）繁殖产生的S^2-及开发过程由地层携带的S^2-对碳钢的腐蚀行为，通过研究认识到SRB繁殖产生的S^2-和开发过程由地层携带的S^2-对碳钢腐蚀行为的影响差别不大；且少量的S^2-对碳钢的腐蚀有抑制作用，但当污水中S^2-质量浓度大于0.5 mg/L时，随着时间的延长S^2-对腐蚀起一定促进作用。

关键词: S^2-浓度, 腐蚀行为, 硫酸盐还原菌, 腐蚀产物膜特点

CLC Number: 

• TE983