Hydromechanical behaviors of andesite under different stress states during fluid injection

doi:10.1016/j.jrmge.2021.04.002

	Hydromechanical behaviors of andesite under different stress states during fluid injection
	He, Miao 1,2; Li, Qi 1,2; Li, Xiaying 1,2; Xu, Liang 1,2; Kuehn, Michael 3,4
刊名	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
	2021-08-01
卷号	13 期号:4 页码:727-744
关键词	Water reinjection Stress state Hydromechanical (HM) coupling Injection-induced seismicity Numerical modeling
ISSN号	1674-7755
DOI	10.1016/j.jrmge.2021.04.002
英文摘要	Water reinjection into the formation is an indispensable operation in many energy engineering practices. This operation involves a complex hydromechanical (HM) coupling process and sometimes even causes unpredictable disasters, such as induced seismicity. It is acknowledged that the relative magnitude and direction of the principal stresses significantly influence the HM behaviors of rocks during injection. However, due to the limitations of current testing techniques, it is still difficult to comprehensively conduct laboratory injection tests under various stress conditions, such as in triaxial extension stress states. To this end, a numerical study of HM changes in rocks during injection under different stress states is conducted. In this model, the saturated rock is first loaded to the target stress state under drainage conditions, and then the stress state is maintained and water is injected from the top to simulate the formation injection operation. Particular attention is given to the difference in HM changes under triaxial compression and extension stresses. This includes the differences in the pore pressure propagation, mean effective stress, volumetric strain, and stress-induced permeability. The numerical results demonstrate that the differential stress will significantly affect the HM behaviors of rocks, but the degree of influence is different under the two triaxial stress states. The HM changes caused by the triaxial compression stress states are generally greater than those of extension, but the differences decrease with increasing differential stress, indicating that the increase in the differential stress will weaken the impact of the stress state on the HM response. In addition, the shear failure potential of fracture planes with various inclination angles is analyzed and summarized under different stress states. It is recommended that engineers could design suitable injection schemes according to different tectonic stress fields versus fault occurrence to reduce the risk of injection-induced seismicity. (C) 2021 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[41872210] ; National Natural Science Foundation of China[41902297] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering[Z018004] ; IRSMGFZ Subsurface Utilization of Captured Carbon and Energy Storage System
WOS研究方向	Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000672711100002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27377]
专题	中科院武汉岩土力学所
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.GFZ German Res Ctr Geosci, Fluid Syst Modelling Sect, Potsdam, Germany 4.Univ Potsdam, Inst Earth & Environm Sci, Potsdam, Germany
推荐引用方式 GB/T 7714	He, Miao,Li, Qi,Li, Xiaying,et al. Hydromechanical behaviors of andesite under different stress states during fluid injection[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2021,13(4):727-744.
APA	He, Miao,Li, Qi,Li, Xiaying,Xu, Liang,&Kuehn, Michael.(2021).Hydromechanical behaviors of andesite under different stress states during fluid injection.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,13(4),727-744.
MLA	He, Miao,et al."Hydromechanical behaviors of andesite under different stress states during fluid injection".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 13.4(2021):727-744.