为获得CO₂羽流地热系统采热特性与不同影响因素之间的关系，通过建立三维几何模型，利用COMSOL Multiphysics软件进行数值模拟研究，深入探讨井筒直径、注采井距、储层渗透率、初始孔隙率以及天然裂缝缝长等因素对CO₂羽流地热系统采热特性的影响。模拟研究结果表明：在控制变量法下，羽流地热系统热提取率随井筒直径的增大呈现先增加后减少的趋势；热提取率随着热储渗透率和注采井距的增大而增大；初始孔隙率增加，热储渗透性能变好，热提取率提高；由于天然裂缝的存在，增大流体流动性，降低生产温度，热突破程度更明显，系统采热效率降低。可见研究结果为优化CO₂羽流地热系统的采热性能提供依据，同时指导深部地热能的开采。

In order to obtain the relationship between the heat recovery characteristics of the CO₂ plume geothermal system and different influencing factors, a three-dimensional geometric model was established and the COMSOL Multiphysics software was used to conduct numerical simulations to further explore the effects of wellbore diameter, injection-production well spacing, reservoir permeability, initial porosity, and natural fracture length on the heat recovery characteristics of the CO₂ plume geothermal system. The simulation results show that under the control variable method, the heat extraction rate of the plume geothermal system increases first and then decreases with the increase of the wellbore diameter, the heat extraction rate increases with the increase of heat storage permeability and injection-production well spacing, the initial porosity increases, the heat storage permeability becomes better, and the heat extraction rate increases. It can be seen that the results of this study provide a basis for optimizing the heat recovery performance of CO₂ plume geothermal system, and guide the extraction of deep geothermal energy.