苏6及苏36-11井区腐蚀因素分析与防护措施

苏里格气田属于低孔、低压、低丰度气田,气井产量低,稳产能力差。目前该气田还处于开发的中前期,与其它H_2S含量较高的气田相比,腐蚀并不严重,腐蚀所带来的问题目前还不突出。但腐蚀应是苏里格气田开发过程的一个难题。油管腐蚀将会引起管串断脱落井等井下事故,更换气井油管不仅增加修井作业成本,而且必须进行压井作业,又会对产层造成伤害,致使产气能力降低。套管腐蚀穿孔将直接导致气井报废。集输管道的腐蚀会引起火灾或爆炸等事故。因此,必须从现在开始积极进行苏里格气田开发井筒腐蚀研究,掌握苏里格气田腐蚀的规律和防腐的基础数据,为制定下一步防腐方案和措施提供依据。

The analysis and protective measures of corrosion factors for Su 6 well area and Su 36-11 well area

With low pressure,low porosity and low abundance sulige gasfield is characterized by a low gas-well deliverability。At present sulige gasfield exploitation is in the beginning and middle stage.Compared with the gas-field with high H_2S content,the corrosion is not heavy,but it is a difficult problem in the development of sulige gasfield.The problem of tubing corrosion causes hole string to fall off.Not only it is more expensive to replaceing gas well tubes but also we must kill operation.Because the well killing job will cause formation damage,the gas production is lower.The casing corrosion leads to puch a hole.It leads directly to destroy the well.The corrosion of gathering line causes fire disaster,explosion and so on。So we must make research on the analysis and protective measures of corrosion factors.Mastering the laws of corrosion factors and the basic date of corrosion protection in order to provide anti-corrosion solutions.