A Set-up for Dispersions and Attenuations Measurements in Fluid-saturated Rocks
L. Pimienta, J. Fortin and Y. Guéguen
Event name: 78th EAGE Conference and Exhibition 2016
Session: Rock Physics I
Publication date: 31 May 2016
Info: Extended abstract, PDF ( 1.45Mb )
Price: € 20
Investigating experimentally the frequency dependence of the elastic properties of fluid-saturated rocks remains challenging. A new set-up using the stress-strain method has been tested and applied to measure elastic properties of fluid saturated rocks. Calibrations have shown that measurements of Young’s modulus and Poisson’s ratio may be obtained with an accuracy of about 1%. Dissipation has been measured down to values of 0.01. The frequency range is [10-3;102] Hz. The method is applied to the study of Fontainebleau sandstone samples saturated by different fluids. Over the range of frequency, two dispersion/dissipation phenomena are measured. Using the existing theories, those two transitions are shown to be the drained/undrained and the undrained/unrelaxed transitions.