Influence of permeability anisotropy on rock damage and heat transfer in geothermal reservoir

doi:10.1007/s12517-021-07705-z

	Influence of permeability anisotropy on rock damage and heat transfer in geothermal reservoir
	Lv, YanXin 1,2,3; Yuan, Chao 1,2; Zhu, XiaoHua 1,2; Wei, Peng 1,2; Gan, Quan 3; Li, HaiBo 4
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2021-07-01
卷号	14 期号:13 页码:11
关键词	THMD Geothermal Thermal shock Anisotropic permeability Heat transfer
ISSN号	1866-7511
DOI	10.1007/s12517-021-07705-z
英文摘要	Enhanced geothermal system technology is in the focus of geothermal energy research due to its large economic growth potential. This study illustrates a pseudo-3D doublet model of EGS using coupled thermo-hydro-mechanical-damage modeling processes in the framework of TOUGHREACT-FLAC3D. Three cases were simulated to evaluate the effect of anisotropic permeability (eta =5, 1, 0.2) on conducting damage, inducing permeability evolution, reducing elastic module, changing reservoir pressure, and thermal power output. The results show that the overall damage zone decreases with the enhancement of anisotropic permeability ratio eta, for eta =5, the damage zone increases with time, and the damage breakthrough appears earlier than the other cases. The fracture permeability of model is obviously affected by the evolution of rock damage and the degradation of elastic modulus, which is the main reason to induce rock damage. The injection-production pressure difference is another factor to rock damage except for thermal stress, which becomes the dominated factor as the model with a lower value of eta, and injection-production pressure difference may be more influential to the model with low anisotropic permeability eta. There is a threshold of permeability anisotropy ratio to balance the above two factors. Comparing the performance of thermal power output in various cases, the increasing reservoir permeability can be controlled to favorable for increasing the efficiency and production of thermal in a short time. From the perspective of whole reservoir lifetime, the effect of injection-production pressure difference on increasing the thermal production is more evident.
资助项目	National Natural Science Foundation of China[51709231] ; National Natural Science Foundation of China[52034006] ; Key Laboratory of Oil & Gas Equipment, Ministry of Education (Southwest Petroleum University)[OGE202102-01]
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000685640200005
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27683]
专题	中科院武汉岩土力学所
作者单位	1.Southwest Petr Univ, Sch Mechatron Engn, Chengdu 610500, Sichuan, Peoples R China 2.Southwest Petr Univ, Lab Oil & Gas Equipment, Minist Educ, Chengdu 610500, Sichuan, Peoples R China 3.Univ Aberdeen, Sch Geosci, Dept Petr Geol & Geol, Aberdeen, Scotland 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Lv, YanXin,Yuan, Chao,Zhu, XiaoHua,et al. Influence of permeability anisotropy on rock damage and heat transfer in geothermal reservoir[J]. ARABIAN JOURNAL OF GEOSCIENCES,2021,14(13):11.
APA	Lv, YanXin,Yuan, Chao,Zhu, XiaoHua,Wei, Peng,Gan, Quan,&Li, HaiBo.(2021).Influence of permeability anisotropy on rock damage and heat transfer in geothermal reservoir.ARABIAN JOURNAL OF GEOSCIENCES,14(13),11.
MLA	Lv, YanXin,et al."Influence of permeability anisotropy on rock damage and heat transfer in geothermal reservoir".ARABIAN JOURNAL OF GEOSCIENCES 14.13(2021):11.