Research status analysis of CO2-enhanced coalbed methane technology
In the context of"dual carbon"goals,the industrial application of CO2-enhanced coalbed methane(CO2-ECBM)is one of the important ways to promote the clean and efficient utilization of coal and the utili-zation of CO2.The CO2-ECBM technology can achieve both underground CO2 storage and increased coalbed methane recovery rates.Compared with developed countries,the research and development of CO2-ECBM technology in Chi-na has been relatively slow.Therefore,it is necessary to elaborate on the research progress of CO2-ECBM technology from the perspectives of mechanism and site experiments.First,laboratory simulation experiments will be intro-duced to study the effects of CO2 adsorption by coal on volume expansion,permeability and mechanical properties.Then,the development history and research progress of CO2-ECBM technology will be discussed based on field ex-periments from around the world.The injectivity of low-permeability coal seams is a key factor limiting the feasibility of this technology,making breakthroughs in enhancing injectivity in low-permeability coal seams a prerequisite for the promotion and application of coalbed methane displacement technology in China.Since existing monito-ring technologies cannot fully meet the needs for optimizing control of the displacement process and safety monitoring,issues such as gas sources,processes,corrosion,safety,and investment must be considered during the development and implementation of CO2-ECBM technology.To address the high costs and insufficient market incentive mecha-nisms associated with the industrial application of coalbed methane displacement technology,it is essential to further improve policies for the development and utilization of coalbed methane at both national and local levels,thereby pro-moting the healthy development of CO2-ECBM technology.
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