Numerical Simulation Study of a Novel Horizontally Layered Enhanced Geothermal System:A Case Study of the Qiabuqia Geothermal Area,Qinghai Province,China

作     者：GAO Kun LIU Weiqun MA Tianran HU Yang FANG Tian YE Lei GAO Kun;LIU Weiqun;MA Tianran;HU Yang;FANG Tian;YE Lei

作者机构：School of Mechanics and Civil EngineeringChina University of Mining and TechnologyXuzhou 221116China State Key Laboratory for Geomechanics and Deep Underground EngineeringChina University of Mining and TechnologyXuzhou 221116China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2021年第30卷第4期

页      面：1328-1340页

核心收录：

学科分类：080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the Fundamental Research Funds for the Central Universities(No.2020ZDPY0222) 

主　　题：hot dry rock enhanced geothermal system thermal-hydrological-mechanical coupling numerical simulation parameter analysis 

摘      要：Hot dry rock,as a renewable and sustainable energy source,can alleviate resource shortages and environmental *** on data from the Qiabuqia geothermal field and an established thermal-hydrological-mechanical coupled mathematical model,a novel horizontally layered enhanced geothermal system(EGS)is proposed and compared with the conventional double vertical well *** the simulated conditions in this paper,the comprehensive heat recovery performance of the horizontally layered EGS is significantly better than that of the double vertical well ***,although the average production temperature of the double vertical well EGS is higher than that of the horizontally layered EGS in the attenuation stage,the heat power output of the horizontally layered EGS ranges from 6.10 MW to 12.25 MW,which is 1.36 to 1.67 times that of the double vertical well ***,the heat recovery rate of the horizontally layered EGS is 6.63%higher than that of the double vertical well EGS and is thus more ***,parametric analysis was performed to investigate the influence of the controllable parameters on heat recovery for the horizontally layered *** heat power output and heat extraction ratio are proportional to the pressure difference and well spacing and inversely proportional to the injection fluid *** thermal power output is most greatly influenced by the pressure difference,followed by the well spacing and injection fluid *** effects of the pressure difference and well spacing on the heat recovery rate are almost the same,and the injection fluid temperature has no effect.