厄瓜多尔某井在生产作业中油管腐蚀穿孔，为了弄清油管穿孔原因，对穿孔油管宏观形貌、材料化学成分、金相组织等进行了分析，并采用扫描电子显微镜观察油管内壁腐蚀微观形貌，利用能谱仪分析内壁腐蚀产物。结果表明,油管腐蚀具有二氧化碳腐蚀的特征。井底CO2溶解于原油中的水形成碳酸容易造成内壁严重腐蚀，失效油管服役井段温度为CO2腐蚀速率较大的温度区间，原油中氯离子的存在对腐蚀起到催化促进作用。

L80 tubing corrosion perforation occurred in a certain well of Ecuador. In order to know the cause of tubing perforation, the macro morphology of the failed tubing，material chemical composition and metallographic microstructure were analyzed, and the micro morphology of corrosion and corrosion products were observed by SEM. Analysis results show that the tubing corrosion has the characteristic of CO2 corrosion. The CO2 dissolved in the water of the crude in the well formed carbonic acid which caused corrosion. The failed tubing was at the well section in which the temperature range caused reletively great CO2 corrosion rate, and the existence of chloride in the crude also catalytically promoted the corrosion.