Forward modeling and inversion are commonly used tools to translate seismic traces into elastic Earth properties. Comparisons of real and multiple iterations of synthetic seismic data, the latter computed from initial and perturbed models of elastic properties, provide this translation. The final Earth model, the one corresponding to the best match between the real and synthetic seismic data, possibly represents the spatial distribution of independent elastic constants such as P-wave impedance (Ip) and Poisson's ratio (ν). Although these maps of elastic properties are meaningful to geophysicists, they fail to supply necessary information to engineers who require lithology, fluid, and porosity, i.e., bulk property maps and in-situ conditions.

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