超临界CO2在页岩气开发中的应用研究进展

Research progress in application of supercritical CO2 in shale gas development

以超临界CO2和页岩气为研究对象,针对超临界CO2在页岩气开发中的应用问题展开了讨论,论述了CO2压裂技术和CO2增强页岩气开采技术的研究进展。CO2增强页岩气开采技术(CO2-ESGR)被视为一种非常有前景的页岩气藏开发方式,能够实现对页岩气的有效开采。CO2不仅可以高效率驱替页岩气,还可代替水介质进行压裂增产作业,同时巧妙地将CO2这种温室气体埋存于页岩储层中实现地质封存,减少温室气体排放。实现页岩储层中CO2地质封存与页岩气开采的一体化,对环境保护和能源开发都具有重要意义。

Supercritical CO2 and shale gas are taken as research objects,the application of supercritical CO2 in shale gas development is discussed.Research progress in CO2 fracturing technology and CO2 enhanced shale gas mining technology(CO2-ESGR)is reviewed.CO2-ESGR is considered as a very promising shale gas development method that enables efficient exploitation of shale gas.CO2 can not only displace shale gas efficiently,but also replace the water medium for fracturing and stimulation.At the same time,it can cleverly store the greenhouse gas CO2 in shale reservoirs to achieve geological storage and reduce greenhouse gas emissions.The integration of CO2 geological storage with shale gas exploitation in shale reservoirs is of great significance to environmental protection and energy development.