DOI: 10.1002/2016GL069546
论文题名: Depth migration of seasonally induced seismicity at The Geysers geothermal field
作者: Johnson C.W. ; Totten E.J. ; Bürgmann R.
刊名: Geophysical Research Letters
ISSN: 0094-9683
EISSN: 1944-9414
出版年: 2016
卷: 43, 期: 12 起始页码: 6196
结束页码: 6204
语种: 英语
英文关键词: ETAS
; induced seismicity
; The Geysers
Scopus关键词: Earthquakes
; Fracture
; Geophysics
; Geothermal fields
; Geysers
; Oil well flooding
; Seismology
; Water injection
; Conductive fracture networks
; Epidemic-type aftershock sequences
; ETAS
; Fracture network
; Geothermal reservoir
; Geysers geothermal fields
; Poroelastic stress
; Spatiotemporal evolution
; Induced Seismicity
英文摘要: Seismicity from injected fluids provides insight into the hydraulically conductive fracture network at The Geysers (TG), California, geothermal reservoir. Induced earthquakes at TG result from both thermoelastic and poroelastic stresses as injected fluids cool the rocks and increase pore pressure. The spatiotemporal evolution of M ≥ 1.5 seismicity is characterized as a function of depth in the northwest and southeast regions of TG to develop time-dependent earthquake rates using an epidemic-type aftershock sequence model. The seismicity and injection follow an annual cycle that peaks in the winter months and is correlated by depth. The results indicate a time lag of ≤6 months for fluids to migrate >3 km below the injection depth. Water injection is the main cause of seismicity as fluids penetrate into the reservoir. Our results suggest that a steeply dipping fracture network of hydraulically conductive faults allows fluid migration to a few kilometers below the point of injection. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977499459&doi=10.1002%2f2016GL069546&partnerID=40&md5=aed7e171acb57d2131db2cf037791bfa
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10646
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Berkeley Seismological Laboratory and Department of Earth and Planetary Science, University of California, Berkeley, CA, United States
Recommended Citation:
Johnson C.W.,Totten E.J.,Bürgmann R.. Depth migration of seasonally induced seismicity at The Geysers geothermal field[J]. Geophysical Research Letters,2016-01-01,43(12).