Bubbles attenuate elastic waves at seismic frequencies: First experimental evidence

Details

Serval ID
serval:BIB_072036E3D191
Type
Article: article from journal or magazin.
Collection
Publications
Title
Bubbles attenuate elastic waves at seismic frequencies: First experimental evidence
Journal
Geophysical Research Letters
Author(s)
Tisato Nicola, Quintal Beatriz, Chapman Samuel, Podladchikov Yury, Burg Jean-Pierre
ISSN-L
0094-8276
Publication state
Published
Issued date
2015
Volume
42
Number
10
Pages
3880-3887
Notes
Times Cited: 0
Quintal, Beatriz/D-4466-2011
0
Abstract
The migration of gases from deep to shallow reservoirs can cause damageable events. For instance, some gases can pollute the biosphere or trigger explosions and eruptions. Seismic tomography may be employed to map the accumulation of subsurface bubble-bearing fluids to help mitigating such hazards. Nevertheless, how gas bubbles modify seismic waves is still unclear. We show that saturated rocks strongly attenuate seismic waves when gas bubbles occupy part of the pore space. Laboratory measurements of elastic wave attenuation at frequencies <100Hz are modeled with a dynamic gas dissolution theory demonstrating that the observed frequency-dependent attenuation is caused by wave-induced-gas-exsolution-dissolution (WIGED). This result is incorporated into a numerical model simulating the propagation of seismic waves in a subsurface domain containing CO2-gas bubbles. This simulation shows that WIGED can significantly modify the wavefield and illustrates how accounting for this physical mechanism can potentially improve the monitoring and surveying of gas bubble-bearing fluids in the subsurface.
Open Access
Yes
Create date
02/10/2015 16:09
Last modification date
20/08/2019 13:29
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