%0 Journal Article %T Effect of fluid viscosity and saturation on the ultrasonic velocities in a Fontainebleau sandstone %+ Institut de Physique du Globe de Paris (IPGP) %A Khalatbari, Azar %A Vo-Thanh, Dung %A Poirier, Jean-Paul %< avec comité de lecture %@ 0094-8276 %J Geophysical Research Letters %I American Geophysical Union %V 18 %N 5 %P 885-888 %8 1991 %D 1991 %R 10.1029/91GL01067 %Z Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]Journal articles %X Simultaneous measurements of the P- and S-wave velocities at 1MHz frequency as a function of temperature from −80°C to 80°C have been made in a Fontainebleau sandstone saturated with glycerol. We investigated 8 saturation degrees, from fully saturated to almost dry state. Generally, the velocity decreases with increasing temperature; it is large between ≈ −40°C and ≈ 40°C. The velocity dispersion is attributed to viscous shear relaxation. The model of O'Connell and Budiansky modified by introducing the saturation parameter and a Gaussian distribution of crack aspect ratios is used to interpret the data. A trial and error method is used to estimate the model parameters. The model satisfactorily accounts for the data at high saturation. %G English %2 https://insu.hal.science/insu-01733635/document %2 https://insu.hal.science/insu-01733635/file/Khalatbari_et_al-1991-Geophysical_Research_Letters.pdf %L insu-01733635 %U https://insu.hal.science/insu-01733635 %~ INSU %~ UNIV-PARIS7 %~ AFRIQ %~ CNRS %~ IPGP %~ UNIV-PARIS