| Автор | Jones, Terry |
| Автор | Nur, Amos |
| Дата выпуска | 1983 |
| dc.description | New measurements of seismic velocity and attenuation have been made in the kiloHertz frequency range to temperatures of 120°C, confining and pore pressure to 200 bars in Berea sandstone. With increasing temperature, shear velocity and attenuation decrease at all pressures in a fully saturated rock. The data suggest that thermal relaxation is not a significant loss mechanism under these conditions. We propose that dissipation is controlled by a viscous fluid flow mechanism, in which a sharp frequency peak in attenuation is shifted from 2kHz at room temperature to 8 kHz at 120°C as the pore fluid viscosity is decreased with increasing temperature. However, the velocity decrease is too great to be accounted for by a change of relaxation times. A non‐dispersive temperature softening in shear may control the velocities. |
| Формат | application.pdf |
| Копирайт | Copyright 1983 by the American Geophysical Union. |
| Название | Velocity and attenuation in sandstone at elevated temperatures and pressures |
| Тип | article |
| DOI | 10.1029/GL010i002p00140 |
| Electronic ISSN | 1944-8007 |
| Print ISSN | 0094-8276 |
| Журнал | Geophysical Research Letters |
| Том | 10 |
| Первая страница | 140 |
| Последняя страница | 143 |
| Выпуск | 2 |
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