Attenuation and dispersion of elastic waves in porous rocks : mechanisms and models /
Wave propagation in all fluid and solid matter is always accompanied by attenuation and dispersion in a broad range of frequencies and scales from free oscillations of the entire Earth to ultrasound in small rock samples. Attenuation is the exponential decay of wave amplitude with propagation distan...
| Main Authors: | , |
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| Format: | Book |
| Language: | English |
| Published: |
Houston :
Society of Explorations Geophysicists,
[2022].
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| Series: | Geophysical references ;
no. 26. |
| Subjects: |
| Summary: | Wave propagation in all fluid and solid matter is always accompanied by attenuation and dispersion in a broad range of frequencies and scales from free oscillations of the entire Earth to ultrasound in small rock samples. Attenuation is the exponential decay of wave amplitude with propagation distance. Dispersion is a variation of propagation velocity with frequency. Attenuation and dispersion can be caused by a variety of physical phenomena that can be divided broadly into two main classes, elastic processes, where the total energy of the wavefield is conserved (scattering of the waves by randomly distributed inhomogeneities) and inelastic dissipation (internal friction), where wave energy is converted into heat. In fluid-saturated porous media, the most common cause of internal friction is wave-induced motion of the fluid relative to the solid frame, Often, this phenomenon is termed wave-induced fluid flow (WIFF) or, perhaps more accurately, wave-induced fluid-pressure relaxation. This book aims to give the reader a detailed description of all of the dissipation mechanisms caused by fluid-pressure relaxation (on macroscopic, mesoscopic and pore scales). |
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| Physical Description: | xxii, 512 pages : illustrations (some color) ; 27 cm. |
| Bibliography: | Includes bibliographical references (pages 435-477) and index. |
| ISBN: | 9781560803904 1560803908 |