We present a methodology to constrain rock physics models and their input parameters from principles of sequence stratigraphy. The purpose is to demonstrate how we can obtain critical sedimentological parameters and relative trends of their spatial variation from sequence stratigraphic interpretation. We present an example of obtaining relative trends of sorting or variation of grain size in progradational lobes of a submarine fan system from the Campos Basin, Brazil. Sorting, a critical sedimentological parameter, can serve as a constraint in rock physics modeling, thereby reducing uncertainty in predicting reservoir properties from seismic velocities.

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