气候变化领域集成服务门户(CCPortal): Hydromechanical Modeling of Fault Reactivation in the St. Gallen Deep Geothermal Project (Switzerland): Poroelasticity or Hydraulic Connection?

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DOI	10.1029/2019GL085201
	Hydromechanical Modeling of Fault Reactivation in the St. Gallen Deep Geothermal Project (Switzerland): Poroelasticity or Hydraulic Connection?
	Zbinden D.; Rinaldi A.P.; Diehl T.; Wiemer S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	In 2013, fluid injection during the St. Gallen deep geothermal project, Switzerland, induced hundreds of seismic events, including a ML 3.5 earthquake on a fault hundreds of meters away from the well. Recent studies have suggested the direct pressure effect through permeable hydraulic connections and poroelastic effects as possible mechanisms for inducing seismicity on distant faults. In St. Gallen, operational, seismic, and earthquake data are available to investigate the underlying physical mechanisms using a numerical model. The results show that Coulomb stress changes at the fault can be 3 orders of magnitude greater when a hydraulic connection is present. Combining this with several field observations, we conclude that the direct pressure effect was more likely the predominant mechanism behind the seismicity induced in St. Gallen. The detection of hydraulic connections may be important for future projects as pressure can be driven far from the well and reactivate remote faults. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Faulting; Geothermal energy; Geothermal prospecting; Induced Seismicity; Pressure effects; Coulomb stress; Coulomb stress changes; Geothermal projects; Hydraulic connection; Hydro-mechanical modeling; Orders of magnitude; Poro-elasticity; Possible mechanisms; Earthquakes; Coulomb criterion; earthquake event; fault; fluid injection; geothermal energy; geothermal system; hydromechanics; induced seismicity; numerical model; poroelasticity; pressure effect; Saint Gall [Switzerland]; Switzerland
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170743
作者单位	Swiss Seismological Service, Swiss Federal Institute of Technology, ETHZ, Zürich, Switzerland
推荐引用方式 GB/T 7714	Zbinden D.,Rinaldi A.P.,Diehl T.,et al. Hydromechanical Modeling of Fault Reactivation in the St. Gallen Deep Geothermal Project (Switzerland): Poroelasticity or Hydraulic Connection?[J],2020,47(3).
APA	Zbinden D.,Rinaldi A.P.,Diehl T.,&Wiemer S..(2020).Hydromechanical Modeling of Fault Reactivation in the St. Gallen Deep Geothermal Project (Switzerland): Poroelasticity or Hydraulic Connection?.Geophysical Research Letters,47(3).
MLA	Zbinden D.,et al."Hydromechanical Modeling of Fault Reactivation in the St. Gallen Deep Geothermal Project (Switzerland): Poroelasticity or Hydraulic Connection?".Geophysical Research Letters 47.3(2020).