A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction

doi:10.1007/s11708-019-0612-4

GIEC OpenIR

	A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction
	Cao, Wenjiong 1; Huang, Wenbo 1; Wei, Guoling 2; Jin, Yunlong 2; Jiang, Fangming1
	2019-09-01
发表期刊	FRONTIERS IN ENERGY
ISSN	2095-1701
卷号	13 期号:3 页码:439-449
通讯作者	Jiang, Fangming(fm_jiang2000@yahoo.com)
摘要	Underground non-Darcy fluid flow has been observed and investigated for decades in the petroleum industry. It is deduced by analogy that the fluid flow in enhanced geothermal system (EGS) heat reservoirs may also be in the non-Darcy regime under some conditions. In this paper, a transient 3D model was presented, taking into consideration the non-Darcy fluid flow in EGS heat reservoirs, to simulate the EGS long-term heat extraction process. Then, the non-Darcy flow behavior in water- and supercritical CO2 (SCCO2)-based EGSs was simulated and discussed. It is found that non-Darcy effects decrease the mass flow rate of the fluid injected and reduce the heat extraction rate of EGS as a flow resistance in addition to the Darcy resistance which is imposed to the seepage flow in EGS heat reservoirs. Compared with the water-EGS, the SCCO2-EGS are more prone to experiencing much stronger non-Darcy flow due to the much larger mobility of the SCCO2. The non-Darcy flow in SCCO2- EGSs may thus greatly reduce their heat extraction performance. Further, a criterion was analyzed and proposed to judge the onset of the non-Darcy flow in EGS heat reservoirs. The fluid flow rate and the initial thermal state of the reservoir were taken and the characteristic Forchheimer number of an EGS was calculated. If the calculated Forchheimer number is larger than 0.2, the fluid flow in EGS heat reservoirs experiences non-negligible non-Darcy flow characteristic.
关键词	enhanced geothermal system non-Darcy flow heat extraction Reynolds number Forchheimer number
DOI	10.1007/s11708-019-0612-4
关键词[WOS]	ENHANCED GEOTHERMAL SYSTEMS ; 3-DIMENSIONAL TRANSIENT MODEL ; CO2 ; SIMULATION ; EXCHANGE
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2018YFB1501804] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA21060700] ; National Natural Science Foundation of China[41702256] ; Natural Science Foundation of Guangdong Province[2017A030310328]
WOS研究方向	Energy & Fuels
项目资助者	National Key R&D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Natural Science Foundation of Guangdong Province
WOS类目	Energy & Fuels
WOS记录号	WOS:000486205000003
出版者	HIGHER EDUCATION PRESS
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/25656
专题	中国科学院广州能源研究所
通讯作者	Jiang, Fangming
作者单位	1.Chinese Acad Sci, Guangdong Key Lab New & Renewable Energy Res & De, CAS Key Lab Renewable Energy, Guangzhou Inst Energy Convers,Lab Adv Energy Syst, Guangzhou 510640, Guangdong, Peoples R China 2.Guangdong Hydrogeol Battal, Guangzhou 510510, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Cao, Wenjiong,Huang, Wenbo,Wei, Guoling,et al. A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction[J]. FRONTIERS IN ENERGY,2019,13(3):439-449.
APA	Cao, Wenjiong,Huang, Wenbo,Wei, Guoling,Jin, Yunlong,&Jiang, Fangming.(2019).A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction.FRONTIERS IN ENERGY,13(3),439-449.
MLA	Cao, Wenjiong,et al."A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction".FRONTIERS IN ENERGY 13.3(2019):439-449.