Numerical Study on the Influence of Well Layout on Electricity Generation Performance of Enhanced Geothermal Systems

doi:10.3390/pr9081474

	Numerical Study on the Influence of Well Layout on Electricity Generation Performance of Enhanced Geothermal Systems
	Zeng, Yuchao 3; Sun, Fangdi 2; Zhai, Haizhen 1
刊名	PROCESSES
	2021-08-01
卷号	9 期号:8 页码:18
关键词	energy efficiency horizontal well enhanced geothermal system well layout vertical well
DOI	10.3390/pr9081474
通讯作者	Zhai, Haizhen(zhaihz@ms.giec.ac.cn)
英文摘要	The energy efficiency of the enhanced geothermal system (EGS) measures the economic value of the heat production and electricity generation, and it is a key indicator of system production performance. Presently there is no systematic study on the influence of well layout on the system energy efficiency. In this work we numerically analyzed the main factors affecting the energy efficiency of EGS using the TOUGH2-EOS1 codes at Gonghe Basin geothermal field, Qinghai province. The results show that for the reservoirs of the same size, the electric power of the three horizontal well system is higher than that of the five vertical well system, and the electric power of the five vertical well system is higher than that of the three vertical well system. The energy efficiency of the three horizontal well system is higher than that of the five vertical well system and the three vertical well system. The reservoir impedance of the three horizontal well system is lower than that of the three vertical well system, and the reservoir impedance of the three vertical well system is lower than that of the five vertical system. The sensitivity analysis shows that well spacing has an obvious impact on the electricity production performance; decreasing well spacing will reduce the electric power, reduce the energy efficiency and only have very slight influence on the reservoir impedance. Fracture spacing has an obvious impact on the electricity production performance; increasing fracture spacing will reduce the electric power and reduce the energy efficiency. Fracture permeability has an obvious impact on the electricity production performance; increasing fracture permeability will improve the energy efficiency and reduce the reservoir impedance.
资助项目	GDAS Project of Science and Technology Development[2020GDASYL-20200102020] ; GDAS Project of Science and Technology Development[2020GDASYL-20200102013] ; GDAS Project of Science and Technology Development[2020GDASYL-20200301003] ; GDAS Project of Science and Technology Development[2020GDASYL-20200402003] ; GDAS Project of Science and Technology Development[2020GDASYL-20200302007] ; GDAS Project of Science and Technology Development[2019GDASYL-0102002] ; Guangdong Foundation for Program of Science and Technology Research[2019B121205006] ; Guangdong Foundation for Program of Science and Technology Research[2019B121201004] ; National Natural Science Foundation of China (NSFC)[41930865] ; Open Foundation of Key Laboratory of Natural Gas Hydrate, CAS[E0290206] ; Northern Guangdong Soil Environment Observation and Research Station ; Guangdong Engineering Center of Non-point Source Pollution Control
WOS关键词	FRACTURED GRANITE RESERVOIR ; HOT DRY ROCK ; 3-DIMENSIONAL TRANSIENT MODEL ; 2 HORIZONTAL WELLS ; HEAT EXTRACTION ; CRYSTALLINE ROCKS ; SIMULATION ; EGS ; FLUID ; FLOW
WOS研究方向	Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000689865900001
资助机构	GDAS Project of Science and Technology Development ; Guangdong Foundation for Program of Science and Technology Research ; National Natural Science Foundation of China (NSFC) ; Open Foundation of Key Laboratory of Natural Gas Hydrate, CAS ; Northern Guangdong Soil Environment Observation and Research Station ; Guangdong Engineering Center of Non-point Source Pollution Control
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/33830]
专题	中国科学院广州能源研究所
通讯作者	Zhai, Haizhen
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Guangzhou Univ, Sch Geog & Remote Sensing, Guangzhou 510006, Peoples R China 3.Guangdong Acad Sci, Inst Ecoenvironm & Soil Sci, Natl Reg Joint Engn Res Ctr Soil Pollut Control &, Guangdong Key Lab Integrated Agroenvironm Pollut, Guangzhou 510650, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Yuchao,Sun, Fangdi,Zhai, Haizhen. Numerical Study on the Influence of Well Layout on Electricity Generation Performance of Enhanced Geothermal Systems[J]. PROCESSES,2021,9(8):18.
APA	Zeng, Yuchao,Sun, Fangdi,&Zhai, Haizhen.(2021).Numerical Study on the Influence of Well Layout on Electricity Generation Performance of Enhanced Geothermal Systems.PROCESSES,9(8),18.
MLA	Zeng, Yuchao,et al."Numerical Study on the Influence of Well Layout on Electricity Generation Performance of Enhanced Geothermal Systems".PROCESSES 9.8(2021):18.