录井识别CO_(2)及其资源的方法和意义

Methods and significance of mud logging to identify CO_(2) and its resources

录井检测CO_(2)主要通过红外线法和热导法,但受钻井液、钻井工程以及CO_(2)本身物理化学性质等因素影响,造成CO_(2)检测不准(含量偏低)或者检测不到。通过阐述地层中CO_(2)气藏成因和钻井液中CO_(2)来源,针对CO_(2)检测影响因素,归纳剖析录井过程中准确识别CO_(2)的应对方法,并从资源发现、为钻采提供数据支持、石油地质研究以及安全等角度阐述了录井在勘探开发过程中识别CO_(2)的重要意义。

CO_(2) is detected by mud logging mainly through infrared and thermal conductivity methods.However,due to the influence of drilling fluid,drilling engineering and physical and chemical properties of CO_(2) itself,CO_(2) detection is inaccurate(low content)or undetectable.By setting forth the genesis of CO_(2) gas reservoir in the formation and the source of CO_(2) in the drilling fluid,and aiming at the influencing factors of CO_(2) detection,the paper summarizes and analyzes coping methods to accurately identify CO_(2) during mud logging,and expounds the significance of mud logging identifying CO_(2) in the process of exploration and development from the perspectives of resource discovery,data support for drilling and production,petroleum geology research and safety.