气候变化领域集成服务门户(CCPortal): Mitigating Injection-Induced Seismicity Along Basement Faults by Extraction: Application to 2016

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DOI	10.1029/2020JB021486
	Mitigating Injection-Induced Seismicity Along Basement Faults by Extraction: Application to 2016–2018 Pohang Earthquakes
	Chang K.W.; Yoon H.
发表日期	2021
ISSN	21699313
卷号	126 期号:4
英文摘要	The risk of induced earthquake is considered as the major obstacle for sustainable subsurface energy activities. As a mitigation approach, mechanistic risk assessment can be essential to minimize the potential of seismic hazard. Coupled hydro-mechanical modeling approach is integrated with geomechanical analysis to better assess the occurrence of seismicity induced by injection and/or extraction, which will provide a basis to update operational conditions (e.g., number and location of mitigating wells, rate and duration of operations) for mitigating earthquake nucleation. The Coulomb stability analysis and seismicity rate estimates from this generic study indicate that simultaneous extraction can relieve injection-induced pore-pressure buildup, but also transfer and accumulate elastic energy along the faults. Field-scale simulation with variation in well design for the Pohang EGS site, South Korea, show that multiple wells aligned across a preexisting fault form gradients of pressure and stress fields normal to the fault, which can enhance the direct impact of diffusion process and poroelastic stressing on the fault stability perturbation. Our mechanistic study suggests multiphysics-oriented mitigation strategies that consider (1) possible mechanical deformation, caused by hydro-mechanical coupling effects, and (2) proper configuration of well operations based on site-specific geological characteristics. © 2021. National Technology & Engineering Solutions of Sandia, LLC.
英文关键词	extraction; induced seismicity; mitigation of seismic hazards; Pohang earthquake; poroelastic coupling
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187183
作者单位	Department of Geotechnology & Engineering, Sandia National Laboratories, Albuquerque, NM, United States; Department of Geomechanics, Sandia National Laboratories, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Chang K.W.,Yoon H.. Mitigating Injection-Induced Seismicity Along Basement Faults by Extraction: Application to 2016–2018 Pohang Earthquakes[J],2021,126(4).
APA	Chang K.W.,&Yoon H..(2021).Mitigating Injection-Induced Seismicity Along Basement Faults by Extraction: Application to 2016–2018 Pohang Earthquakes.Journal of Geophysical Research: Solid Earth,126(4).
MLA	Chang K.W.,et al."Mitigating Injection-Induced Seismicity Along Basement Faults by Extraction: Application to 2016–2018 Pohang Earthquakes".Journal of Geophysical Research: Solid Earth 126.4(2021).