f The effect of stress on wave propagation in aeolian Rotliegend sandstones

In order to relate P- and S wave propagation to the static stress in a transversely isotropic aeolian Rotliegend reservoir sandstone ultrasonic experiments in the 0-84 MPa stress region were performed. In a true triaxial pressure machine full wave forms were recorded in three mutually perpendicular directions (Cruts, 1995). From these measurements the stress dependence of the velocity, attenuation and dispersion behavior, of the different wave modes in different directions were determined. The results of these experiments can be helpful to the inversion process of relating wave propagation to (in-situ) stresses.