The displacement efficiency of supercritical state CO2 flooding are obviously better than those of other common displacement media,such as methane and nitrogen.The field CO2 flooding practice indicates that CO2 miscible displacement is able to improve the final oil recovery factor by 10 to 25 percentages compared to water flooding.CO2 flooding can remarkably increase the recoverable reserve of low-permeability reservoirs.It is the same important development method as water flooding and a technology that can dramatically enhance oil recovery.Therefore,it is the new quality productive forces for oil and gas development in the new era.In addition to the mechanism of increasing oil and gas production,CO2 flooding can also achieve carbon sequestration and contribute carbon indicators to carbon neutrality.It is necessary to establish an all-new production engineering and technological system suitable for CO2 flooding,including reservoir engineering for high-efficiency development and permanent burial,wellbore engineering for all-new injection,producing and geological storage,all-new surface engineering of closed process flow,and a network of CO2 transportation pipelines to ensure the integrity of CCUS wellbore,surface processes,geological bodies,and project management,as well as the standardization of reservoir engineering.It is proposed to establish a pragmatic workable financial and tax policy support system,cultivate a group of CCUS professional talents,and accelerate some key field pilot tests of CCUS-EGR,and realize the integration development with new energy business.
关键词
CO2驱/高效开发/终极埋存/新质生产力/工程思维
Key words
CO2 flooding/high-efficiency development/final burial/new quality productive forces/engineering mindset
万方数据