The paper describes effects of shale content, porosity and water- and gas saturation on elastic parameters of rocks. The analysis was based on theoretical relationships for porous media, known as the Biot-Gassmann's and Kuster and Toksöz's models, and on Raymer-Hunt-Gardner formulas. Well-logging data and results of the quantitative interpretation of well logs were also analysed. The relationships between P-wave and S-wave velocities and reservoir parameters may contribute to solving some problems associated with seismic interpretation of wave forms in Miocene gas deposits in the Carpathian Foredeep.
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