DOI: 10.1002/2014GL061908
论文题名: Evolution of pore fluid pressures in a stimulated geothermal reservoir inferred from earthquake focal mechanisms
作者: Terakawa T.
刊名: Geophysical Research Letters
ISSN: 0094-9631
EISSN: 1944-9362
出版年: 2014
卷: 41, 期: 21 起始页码: 7468
结束页码: 7476
语种: 英语
英文关键词: fluid injection
; focal mechanism solution
; geothermal reservoir
; inversion analysis
; pore fluid pressure
; stress field
Scopus关键词: Feedback
; Geothermal fields
; Geothermal wells
; Hydraulic fracturing
; Water injection
; Fluid injections
; Focal mechanism
; Geothermal reservoir
; Inversion analysis
; Pore fluid pressure
; Stress field
; Earthquakes
; earthquake event
; estimation method
; faulting
; fluid injection
; fluid pressure
; focal mechanism
; geothermal system
; hypolimnion
; pore pressure
; pressure field
; slip rate
; stress analysis
; Basel
; Basel-Stadt
; Switzerland
英文摘要: This paper proposes an inversion method to estimate the evolution of pore fluid pressure fields from earthquake focal mechanism solutions. Application of the method to induced seismicity in the Basel enhanced geothermal system in Switzerland shows the evolution of pore fluid pressure in response to fluid injection experiments. The pore fluid pressure in the reservoir was less than the minimum principal stress at each depth, indicating that hydraulic fracturing did not occur during the stimulation. This suggests that seismic events may play an important role in promoting the development of permeable channels, particularly southeast of the borehole where the largest seismic event (Mw 2.95) occurred. This is not directly related to a drastic decrease in fault strength at the hypocenter but rather to positive feedback between permeability enhancement and elastic/poroelastic stress loading from slipping interfaces. Key Points A method is developed to estimate the evolution of pore fluid pressure fieldsThis method is tested on the Basel, Switzerland, geothermal reservoirSeismic events may play an important role in enhancing crustal permeability ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912126123&doi=10.1002%2f2014GL061908&partnerID=40&md5=d0b58a860e3e36386b04f3883e7a38d7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6895
Appears in Collections: 气候减缓与适应
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作者单位: Earthquake and Volcano Research Center, Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
Recommended Citation:
Terakawa T.. Evolution of pore fluid pressures in a stimulated geothermal reservoir inferred from earthquake focal mechanisms[J]. Geophysical Research Letters,2014-01-01,41(21).