【摘要】 二氧化碳羽流地热系统(CPGS)是一种新的地热能的开采技术,其以超临界CO2作为地下热能载体,利用天然孔隙介质,实现深部地热资源的提取与CO2地质储存的双重目的。以松辽盆地中央凹陷区泉头组三、四段为目标储层,运用TOUGH2/ECO2H软件建立了平面二维羽流地热模型,且对地下载热流体进行了数值模拟,定量分析了注入井与生产井井间距离以及储层渗透率对热提取率的影响。模拟结果显示,羽流地热系统的热提取率随着注入井与生产井的井间距离和储层渗透率的增大而增大。为提高CO2羽流地热系统的能量输出,应选择"中等渗透率(模型为10-15~10-14 m2)、注入井与生产井的井间距离长(模型为707.10m)"的地层作为热储层。更多还原

【Abstract】 CO2Plume Geothermal System(CPGS)is a new technology of geothermal drilling which is using supercritical carbon dioxide plumes of CO2 as underground thermal energy carrier and natural porous as media to achieve deep geothermal system of resource extraction and CO2 geological storage.In this paper,a two-dimensional model of CO2 plume geothermal was established basing on TOUGH2/ECO2 H and the geothermal reservoir of K1q3 and K1q4 of Quantou Formation in the central depression of Song Liao Basin.Also,the thermal fluid on the ground downloaded numerical simulation was established,the distance between injection wells and production wells was quantitatively analyzed,and the impact of reservoir permeability to heat extraction rate was evaluated.Simulation results show that the heat extraction rate of the CO2 plume geothermal systems increases with the distance expanding between the production and injection wells,and with the increasing of reservoir permeability.As a result,in order to enhance the energy output of CO2 plume geothermal systems,the geothermal reservoir formations with middle permeability rate(between10-15 and 10-14 m2)and certain wells distance(707.10m)between production and injection wells are recommended in this paper.更多还原