Monitoring near-surface pore-pressure variations using passive interferometric ballistic waves
Name
segam2020-3426489.1.pdf
Description
Published version
Size
503.76 KB
Format
Adobe PDF
Checksum (MD5)
38a3186d0496da01f63d10853e1b2127
Author(s)
Mordret, A
Brenguier, F
Courbis, R
Chmiel, M
Campman, X
Boué, P
Lecocq, T
Van der Veen, W
Hollis, D
Date Issued
September 30, 2020
Journal
SEG Technical Program Expanded Abstracts 2020
Publisher
Society of Exploration Geophysicists
Citation
A. Mordret, F. Brenguier, R. Courbis, M. Chmiel, X. Campman, P. Boué, T. Lecocq, W. Van der Veen, D. Hollis; September 1, 2020. "Monitoring near-surface pore-pressure variations using passive interferometric ballistic waves." Proceedings of the SEG Technical Program Expanded Abstracts 2020. SEG Technical Program Expanded Abstracts 2020. (pp. pp. 3557-3561). ASME.
Version
Final published version
Abstract
Passive monitoring via coda-wave interferometry is now widely used to follow temporal changes of seismic wave speed in the crust due to tectonic, volcanic or environmental forcing. However, this method is still limited by its poor spatial resolution which prevents accurate location of the source of the velocity change. Here we show that, with a dense seismic array and intense spatial averaging, we can retrieve ballistic P-waves and Rayleigh waves from daily ambient-noise correlations. Measuring their time-shift in the time vs. offset domain for subsequent days allows us to monitor and locate velocity changes in the near-surface due to pore-pressure variations caused by rainfall and atmospheric pressure changes. This study paves the way to reservoir monitoring applications, especially for ground water resources management.
Terms of Use
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Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1190/segam2020-3426489.1
