DOI: 10.1002/2016GL070410
论文题名: Seismic velocity changes associated with aseismic deformations of a fault stimulated by fluid injection
作者: Rivet D. ; De Barros L. ; Guglielmi Y. ; Cappa F. ; Castilla R. ; Henry P.
刊名: Geophysical Research Letters
ISSN: 0094-8605
EISSN: 1944-8336
出版年: 2016
卷: 43, 期: 18 起始页码: 9563
结束页码: 9572
语种: 英语
英文关键词: aseismic deformation
; controlled experiment
; fault stimulation
; fluid injection
; seismic velocity changes
Scopus关键词: Deformation
; Seismic waves
; Seismology
; Shear waves
; Velocity
; Wave propagation
; Controlled experiment
; Effective stress
; Fluid injections
; Injection pressures
; Mechanical response
; Monitoring network
; P- and S-wave velocities
; Seismic velocities
; Flow of fluids
英文摘要: Fluid pressure plays an important role in the stability of tectonic faults. However, the in situ mechanical response of faults to fluid pressure variations is still poorly known. To address this question, we performed a fluid injection experiment in a fault zone in shales while monitoring fault movements at the injection source and seismic velocity variations from a near-distance (<10 m) monitoring network. We measured and located the P and S wave velocity perturbations in and around the fault using repetitive active sources. We observed that seismic velocity perturbations dramatically increase above 1.5 MPa of injection pressure. This is consistent with an increase of fluid flow associated with an aseismic dilatant shearing of the fault as shown by numerical modeling. We find that seismic velocity changes are sensitive to both fault opening by fluid invasion and effective stress variations and can be an efficient measurement for monitoring fluid-driven aseismic deformations of faults. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84989295954&doi=10.1002%2f2016GL070410&partnerID=40&md5=16cf90c7473b9e805549459bdf642b7b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9568
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: Université Côte d'Azur, CNRS, OCA, IRD, Géoazur, France
Recommended Citation:
Rivet D.,De Barros L.,Guglielmi Y.,et al. Seismic velocity changes associated with aseismic deformations of a fault stimulated by fluid injection[J]. Geophysical Research Letters,2016-01-01,43(18).