A novel flow-resistor network model for characterizing enhanced geothermal system heat reservoir
作者机构：Laboratory of Advanced Energy Systems of CAS Key Laboratory of Renewable Energyand Guangdong Key Laboratory of New and Renewable Energy Research and DevelopmentGuangzhou Institute of Energy Conversion.Chinese Academy of Sciences(CAS)Guangzhou 510640China
出 版 物：《Frontiers in Energy》 (能源前沿（英文版）)
年 卷 期：2019年第13卷第1期
页 面：99-106页
核心收录：
学科分类：0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理]
主 题：enhanced geothennal systems flow-resistor network model fracture characteristics heat reservoir
摘 要：The fracture characteristics of a heat reservoir are of critical importance to enhanced geothennal systems,which can be investigated by theoretical modeling.This paper presents the development of a novel flow.Fesistor network model to describe the hydraulic processes in heat reservoirs.The fractures in the reservoir are simplified by using flow resistors and the typically complicated fracture network of the heat reservoir is converted into a flowresistor network with a reasonably simple pattern.For heat reservoirs with various fracture configurations,the corresponding flow-resistor networks are identical in terms of framework though the networks may have difftrent section numbers and the flow resistors may have different values.In this paper,numerous cases of different section numbers and resistor values are calculated and the results indicate that the total number of flow resistances between the injection and production wells is primarily determined by the number of fractures in the reservoir.It is also observed that a linear dependence of the total flow resistance on the number of fractures and the relation is obtained by the best fit of the calculation results.Besides,it perfbmis a case study dealing with the Soultz enhanced geothermal system(EGS).In addition,the fracture numbers underneath specific well systems are derived.The results provide in sight on the tortuosity of the flow path betwee n different wells.
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