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| Titel |
Bubbles cause seismic wave attenuation: Laboratory measurements and numerical simulations |
| VerfasserIn |
Nicola Tisato, Beatriz Quintal, Samuel Chapman, Yury Podladchikov, Giovanni Grasselli, Jean-Pierre Burg |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250104531
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| Publikation (Nr.) |
 EGU/EGU2015-3953.pdf |
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| Zusammenfassung |
| Seismic wave attenuation (1/Q) is a key to uncover the saturation and, in general, to improve
the monitoring and surveying of subsurface domains. Nevertheless, how fluids that saturate
rocks absorb elastic energy (i.e.Âcause 1/Q) is still poorly understood, studied and
incorporated in geophysical methods.
One of the invoked mechanisms, wave induced fluid flow (WIFF), is reputed to cause
significant attenuation. This mechanism is governed by the flow of viscous fluids into a
porous rock, and causes attenuation as a function of the fluid diffusivity [m2/s] and the
pressure gradient [Pa/m], which is generated by the propagation of the elastic wave.
However, some published, and newly acquired laboratory data-sets reporting 1/Q in
almost fully saturated sandstones are difficult to explain with WIFF theories as they
are frequency-dependent and have maximum of attenuation at frequencies |
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