温度对旅大5-2油田热水驱回注管线腐蚀的影响规律  

Influence of Temperature on Corrosion Behaviour of Hot Water Flooding Tubing in Lvda 5-2Oilfield

作　　者：陈华兴 刘义刚 庞铭 王宇飞 白健华 王虎[2] CHEN Huaxing;LIU Yigang;PANG Ming;WANG Yufei;BAI Jianhua;WANG Hu(Bohai Petroloum Research Institute,CNOOC Ltd.Tianjin Branch,Tianjin 300459,China;School of New Engergy and Materials,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459 [2]西南石油大学新能源与材料学院,成都610500

出　　处：《腐蚀与防护》2023年第12期45-52,共8页Corrosion & Protection

基　　金：绥中36-1/旅大5-2二次调整项目(CCL2021 TJT0NST0804)。

摘　　要：采用高温高压腐蚀试验,研究了温度对旅大5-2油田热水驱回注管线腐蚀行为的影响,并采用扫描电镜、能谱仪和X射线衍射仪,分析了温度对管线腐蚀的影响机理。结果表明:在60~260℃范围内,管线的腐蚀速率随着温度的升高先增加后减小,峰值出现在150℃,不同温度下管线的腐蚀速率均超过0.076 mm/a的标准值;不同温度下形成的腐蚀产物膜差异较大,在60~110℃下腐蚀产物很少,在130℃及150℃下形成了Ca_(0.1)Mg_(0.33)Fe_(0.57)(CO_(3)),产物较多、较为疏松,在180℃下产物膜为Ca_(0.1)Mg_(0.33)Fe_(0.57)(CO_(3)),分为致密底层和疏松表层;在260℃下形成了较致密的薄层CaCO_(3)产物膜。The influence of temperature on the corrosion behavior of hot water flooding reinjection pipeline in Lvda 5-2oilfield was studied by high temperature and high pressure corrosion test.The influence mechanism of temperature on pipeline corrosion was analyzed by scanning electron microscope,energy dispersive spectrometer and X-ray diffractometer.The results showed that with the increase of temperature in the range of 60-260℃,the corrosion rate of pipelines increased first and then decreased,and the peak value appearred at 150℃.The corrosion rate of pipelines at different temperatures exceeded the standard value of 0.076mm/a.The corrosion product films formed at different temperatures was quite different.At 60-110℃,there were few corrosion products.At 130℃and 150℃,Ca_(0.1)Mg_(0.33)Fe_(0.57)(CO_(3))were formed,and the products were more and looser.At 180℃,the product film was Ca_(0.1)Mg_(0.33)Fe_(0.57)(CO_(3)),which was divided into dense bottom layer and loose surface layer.A dense thin layer of CaCO_(3)product film was formed at 260℃.

关 键 词：热水驱 N80钢 腐蚀行为 温度 

分 类 号：TG174[金属学及工艺—金属表面处理]