高含硫气田元素硫腐蚀机理及其评价方法

Elemental sulfur corrosion mechanism and evaluation methods for high sour gas fields

在高含硫气田的开发过程中,往往会出现元素硫的沉积现象。元素硫一旦沉积以后,很有可能堵塞采输管线并造成管材的严重腐蚀,对气田的正常生产影响很大。介绍了高含硫气田元素硫的来源及其危害,在此基础上分析了元素硫腐蚀的机理,详细论述了元素硫的腐蚀评价方法,并分析了每种方法的适用范围及其特点,根据国内现状,提出了具体的认识和建议。

The elemental sulfur deposition often occurs in the exploitation of high sour gas field.The presence of elemental sulfur has been long known to corrode carbon steel extremely and may block the gathering lines.It will influence the normal production of gas fields.This paper introduces the source and damage of elemental sulfur(S) in sour gas field.Based on this information the corrosion evaluation method is stated in detail,while the application range of each corrosion evaluation method and their characteristics are analyzed,as well as the mechanism of elemental sulfur corrosion.In the end,the detailed understandings and suggestions according to the current situation in China are proposed.