| DOI: | 10.1002/grl.50447
|
| 论文题名: | Azimuthal anisotropy at Valhall: The Helmholtz equation approach |
| 作者: | Mordret A.; Shapiro N.M.; Singh S.; Roux P.; Montagner J.-P.; Barkved O.I.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-8918
|
| EISSN: | 1944-8649
|
| 出版年: | 2013
|
| 卷: | 40, 期:11 | | 起始页码: | 2636
|
| 结束页码: | 2641
|
| 语种: | 英语
|
| 英文关键词: | anisotropy
; seismic noise
; Valhall
|
| Scopus关键词: | Azimuthal anisotropy
; Cross-correlation function
; Geomechanical modeling
; Hydrocarbon reservoir
; Seismic networks
; Seismic noise
; Shear wave splitting
; Valhall
; Seismology
; Sensors
; Wave propagation
; Anisotropy
; ambient noise
; anisotropy
; azimuth
; correlation
; Helmholtz equation
; hydrocarbon reservoir
; S-wave
; seafloor
; seismic tomography
; subsidence
; travel time
; wave direction
; wave propagation
; wave velocity
|
| 英文摘要: | We used 6 h of continuous vertical records from 2320 sensors of the Valhall Life of Fields Seismic network to compute 2,690,040 cross-correlation functions between the full set of sensor pair combinations. We applied the "Helmholtz tomography" approach combined with the ambient noise correlation method to track the wave front across the network with every station considered as a virtual source. The gradient of the interpolated phase travel time gives us an estimate of the local phase speed and of the direction of wave propagation. By combining the individual measurements for every station, we estimated the distribution of Scholte's wave phase speeds with respect to azimuth. The observed cosine pattern indicates the presence of azimuthal anisotropy. The elliptic shape of the fast anisotropy direction is consistent with results of previous shear wave splitting studies and reflects the strong seafloor subsidence due to the hydrocarbon reservoir depletion at depth and is in good agreement with geomechanical modeling. © 2013 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879915021&doi=10.1002%2fgrl.50447&partnerID=40&md5=4add44938473b5dbc88ed4e1358ba274
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6182
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Institut de Physique du Globe de Paris, CNRS UMR 7154, Université Paris Diderot, 1, rue Jussieu, 75238 Paris cedex 05, France
|
| Recommended Citation: | |
Mordret A.,Shapiro N.M.,Singh S.,et al. Azimuthal anisotropy at Valhall: The Helmholtz equation approach[J]. Geophysical Research Letters,2013-01-01,40(11).
|
|
|