Abstract
Rock physics model (RPM) transforms reservoir characteristics into elastic seismic properties which control generation of seismic responses through synthetic seismic simulation. The changes in fluid saturation or pressure lead to corresponding changes in seismic responses based on constructed RPM. The different RPMs are first constructed based on four different strategies of Gassmann's equation, Krief's formulation, Duffy–Mindlin's method, and Wyllie's equation. Differences among these RPMs are analyzed before performing sensitivity analysis of changes in seismic responses with respect to changes in reservoir parameters. The synthetic seismic responses used for the analysis are generated from the seismic simulation, which algorithm is developed by using a finite difference method based on staggered grid with convolutional perfect match layer and free surface.
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