Numerical modeling of thermal breakthrough induced by geothermal production in fractured granite

doi:10.1016/j.jrmge.2020.01.002

	Numerical modeling of thermal breakthrough induced by geothermal production in fractured granite
	Liu, Hejuan 3,4; Wang, Hongwei 5; Lei, Hongwu 3,4; Zhang, Liwei 3,4; Bai, Mingxing 1; Zhou, Lei 2
刊名	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
	2020-08-01
卷号	12 期号:4 页码:900-916
关键词	Thermal breakthrough Discrete fracture network (DFN) Monte Carlo method Fracture aperture Granite
ISSN号	1674-7755
DOI	10.1016/j.jrmge.2020.01.002
英文摘要	It is well known that the complicated channeling of fluid flow and heat transfer is strongly related with the intricate natural fracture system. However, it is still challenging to set up the fracture network model which is strong heterogeneous. Compared with other methods (e.g. equivalent continuum model (ECM), discrete fracture model (DFM), and ECM-DFM), the fracture flow module in the COMSOL Multiphysics simulator is powerful in definition of fractures as the inner flow boundary existing in the porous media. Thus it is selected to simulate the fluid flow and heat transfer in the geothermal-developed fractured granite of Sanguliu area located at Liaodong Peninsula, Eastern China. The natural faults/fractures based on field investigation combined with the discrete fracture network (DFN) generated by the MATLAB are used to represent the two-dimensional geological model. Numerical results show that early thermal breakthrough occurs at the production well caused by quick flow of cold water along the highly connected fractures. Suitable hydraulic fracturing treatments with proper injection rates, locations, etc. can efficiently hinder the thermal breakthrough time in the natural fracture system. Large well spacing helps the long-term operation of geothermal production, but it is highly dependent on the geometrical morphology of the fracture network. The enhancement of reservoir properties at the near-well regions can also increase the geothermal production efficiency. The results in this study can provide references to achieve a sustainable geothermal exploitation in fractured granitic geothermal reservoirs or hot dry rocks at depth. (C) 2020 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V.
资助项目	National Natural Science Foundation of China (NSFC)[51809259] ; National Natural Science Foundation of China (NSFC)[51774056] ; National Natural Science Foundation of China (NSFC)[51774095] ; CAS Pioneer Hundred Talents Program in China
WOS研究方向	Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000560491300019
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24663]
专题	中科院武汉岩土力学所
通讯作者	Zhou, Lei
作者单位	1.Northeast Petr Univ, Dept Petr Engn, Daqing 163318, Peoples R China 2.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400030, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 5.Chengdu Univ Technol, Coll Energy, Chengdu 610059, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hejuan,Wang, Hongwei,Lei, Hongwu,et al. Numerical modeling of thermal breakthrough induced by geothermal production in fractured granite[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2020,12(4):900-916.
APA	Liu, Hejuan,Wang, Hongwei,Lei, Hongwu,Zhang, Liwei,Bai, Mingxing,&Zhou, Lei.(2020).Numerical modeling of thermal breakthrough induced by geothermal production in fractured granite.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,12(4),900-916.
MLA	Liu, Hejuan,et al."Numerical modeling of thermal breakthrough induced by geothermal production in fractured granite".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 12.4(2020):900-916.