C047 Petroacoustics for Seismic Monitoring and Overpressure prediction Abstract 1 The production of oil and gas reservoirs or the storage of gas in geological formations always has direct repercussions on the fluid content and pore pressure and hence on the seismic properties of reservoir rocks. This paper describes experimental results in the laboratory on the effect of the variations of pressure and of saturating fluid on elastic wave propagation velocities in reservoir rocks. The simultaneous effect of the fluid substitution and of the differential pressure (the difference between the confining pressure and the porepressure) on seismic properties are shown. Another


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