| Autor: |
N. L. Baransky, E. A. Davydova, A. N. Inozemtsev, E. A. Kozlov |
| Rok vydání: |
2006 |
| Předmět: |
|
| Zdroj: |
68th EAGE Conference and Exhibition incorporating SPE EUROPEC 2006. |
| DOI: |
10.3997/2214-4609.201402329 |
| Popis: |
We analyze compressional wave attenuation in fluid-saturated porous material with porous inclusions having different compressibility and very different spatial scale in comparison with the background. Such a medium exhibits attenuation due to wave-induced fluid flow across the interface between inclusion and background. We show that overall wave attenuation is governed by the superposition of two coupled fluid-diffusion processes. Associated with two characteristic spatial scales, we compute two cross-over frequencies that separate three different frequency regimes. We give a physical explanation for an intermediate range of frequencies, where attenuation scales with square-root of frequency. The potential application of this model is in estimation of the background permeability as well as inclusion scale (thickness) by identifying these frequencies from the attenuation measurement. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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