DOI: 10.1029/2012GL054147
论文题名: The role of Coulomb stress changes for injection-induced seismicity: The Basel enhanced geothermal system
作者: Catalli F. ; Meier M.-A. ; Wiemer S.
刊名: Geophysical Research Letters
ISSN: 0094-9421
EISSN: 1944-9152
出版年: 2013
卷: 40, 期: 1 起始页码: 72
结束页码: 77
语种: 英语
Scopus关键词: Coulomb stress changes
; Enhanced geothermal systems
; Forecasting ability
; Friction coefficients
; Hydraulic stimulations
; Location accuracy
; Seismic hazard assessment
; Sensitivity-of-results
; Geothermal fields
; Injection (oil wells)
; Uncertainty analysis
; accuracy assessment
; Coulomb criterion
; earthquake magnitude
; friction
; geothermal system
; induced seismicity
; seismic hazard
; time dependent behavior
; trigger mechanism
; Basel
; Basel-Stadt
; Switzerland
英文摘要: We estimate Coulomb stress variations (ΔCFS) by considering interactions among 163 earthquakes (ML≤3.4) that occurred during the hydraulic stimulation of the enhanced geothermal system in Basel, Switzerland, in 2006. We observe that overall 75% of event locations are consistent with positive ΔCFS. The performance of the model increases with time and distance from injection, accordingly with the presumed less dominant role of the pore pressure further from the injection well and after shutin. We analyze the sensitivity of results to location and focal mechanism uncertainties, the fault-plane ambiguity, and the friction coefficient. We find that ΔCFS are highly sensitive to location accuracy but robust with regard to uncertainties of the other parameters. Our results suggest that (i) the Coulomb model may complement conventional porepressure triggering models and (ii) implementing it for timedependent seismic hazard assessment during fluid injection may improve the forecasting ability but will require highly accurate hypocenter estimates. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874834298&doi=10.1029%2f2012GL054147&partnerID=40&md5=ab0a77d00949e2379bc9affa93a4990a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6685
Appears in Collections: 气候减缓与适应
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作者单位: Swiss Seismological Service, Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland
Recommended Citation:
Catalli F.,Meier M.-A.,Wiemer S.. The role of Coulomb stress changes for injection-induced seismicity: The Basel enhanced geothermal system[J]. Geophysical Research Letters,2013-01-01,40(1).