Natural materials (e.g. rocks and soils) are porous media, whose microstructures present a wide diversity. They generally consist of a heterogeneous solid phase and a porous phase which may be fully or partially saturated with one or more fluids. The prediction of elastic and acoustic properties of porous materials is very important in many fields, such as physics of rocks, reservoir geophysics, civil engineering, construction field and study of the behavior of historical monuments. The aim of this work is to predict the elastic and acoustic behaviors of isotropic porous materials of a solid matrix containing dry, saturated and partially saturated spherical pores. For this, a homogenization technique based on the Mori–Tanaka model is presented to connect the elastic and acoustic properties to porosity and degree of water saturation. Non-destructive ultrasonic technique is used to determine the elastic properties from measurements of P-wave velocities. The results obtained show the influence of porosity and degree of water saturation on the effective properties. The various predictions of Mori–Tanaka model are then compared with experimental results for the elastic and acoustic properties of calcarenite.

The goal of this study is to estimate the kappa (κ) parameter for a group of 12 broadband stations, located in different geological structures in Morocco, a country with moderate seismic activity. In this study, the kappa, κ has been obtained from the spectral analysis of the shear waves of 42...

In the present study, the petrophysical properties of five different rocks have been measured and analyzed. This is the thermal conductivity, P-wave velocity and porosity. The methodology to estimate the thermal conductivity is to impose heat flux unidirectional on a sample and measure the temperature difference across the sample. The ultrasonic testing is based on the measurement of propagation time of a P-wave in the longitudinal direction. The porosity is measured by the mercury porosimetry technique, based on the measurement of the volume of mercury intruded into the rock under different pressures (mercury intrusion). The results have been shown a direct effect of porosity on thermal conductivity and P-wave velocity. We have found good relationship between the petrophysical properties such as P-wave velocities versus porosity and P-wave velocities versus thermal conductivity coefficient .The experimental results have been then compared with theoretical models available in the literature. These results, consistent with theory, show the possibility of estimating the thermal conductivity from the P-wave velocity and the use of non-destructive methods. Résumé. Dans ce travail, des propriétés pétrophysiques de cinq roches différentes ont été mesurées et analysées. Il s'agit de la conductivité thermique, la vitesse de propagation d'onde P et la porosité. En ce qui concerne la conductivité thermique, on impose à un échantillon un flux de chaleur unidirectionnel et on mesure la différence de température aux bornes de l'échantillon. Le test ultrasonique est basé sur la mesure du temps de propagation d'une onde P dans le sens longitudinal. La porosité est mesurée par la technique de porosimétrie au mercure, basée sur la mesure de la quantité de mercure insérée dans les pores d'une roche sous différentes pressions (intrusion de mercure). Les résultats obtenus montrent un effet direct de la porosité sur La Web of Conferences