F019 Nonlinear and Dispersive Wave Propagation in Rocks Saturated with Multi-Phase Fluids M. Chapman* (British Geological Survey) & E. Liu (British Geological Survey) SUMMARY There is great interest in the problem of relating partial gas saturation to seismic attributes such as attenuation. A tool for the proper interpretation of the relationship must combine the “squirt-flow” and “gas-pocket” models. In this paper we develop a new rock physics model which combines these two effects. Surprisingly the theory predicts non-linear wave propagation when we have saturation with multiphase fluids. Nevertheless we give a technique for calculating approximate effective attenuation and dispersion. We


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