注二氧化碳驱油已经应用多年。持续注入二氧化碳使很多油层压力较高 ,二氧化碳处于超临界状态 ,加上一些井身腐蚀老化 ,一旦压力失控 ,超临界二氧化碳急剧膨胀 ,极易发生井喷。超临界二氧化碳的特性使二氧化碳井喷呈现出独特的复杂性 ,在井控方面提出了一些特殊要求。本文讨论了注入工程中二氧化碳的物理和化学特性、井喷特点、特殊危害、腐蚀、防范措施和井控方法 ,并对近期发生的几起二氧化碳井喷事故做了具体案例分析 Carbon dioxide flooding has been used for many years. Continued injection of carbon dioxide pressure of many reservoirs, carbon dioxide in the supercritical state, coupled with some borehole corrosion aging, once the pressure out of control, supercritical carbon dioxide rapid expansion, prone to blowout. The characteristics of supercritical carbon dioxide make CO2 blowout unique and complex, and some special requirements are put forward in well control. This paper discusses the physical and chemical properties, well blowout characteristics, special hazards, corrosion, precautionary measures and well control methods of carbon dioxide injected into the project, and makes specific case studies on several recent carbon dioxide blowout accidents