Evaluation of Porosity and Saturation Degree by Laboratory Joint Measurements of Velocity and Resistivity: A Model Improvement

This paper illustrates the laboratory procedures and experiments carried out on samples with different lithologies and reconstructed samples in order to test and implement an electroseismic model (CARRARA et al., 1994) which allows the evaluation of porosity and the saturation degree of rocks. The testing was conducted by comparing porosity ( ) and saturation degree (Sw ) values, obtained from measured resistivity ( ) and elastic wave velocity (VP ) by means of appropriate formulations, with the values of and Sw previously calculated by geotechnics and employed as standards. The experimental results have led to a good definition of the model to be proposed as an application method in the field of hydrogeology.