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We know that heterogeneity causes scattering, and we have discovered that
this scattering is not apparent in the transmissivity at least up to
and including the second-order term in . A straight-forward
consequence is that no visco-elastic model can simulate scattering
loss - it has to be a less lossy system. Nor can the equivalent dynamic
model be a Kjartannsson model since this would have the wrong static
(non-elastic) properties. Is there necessarily any dynamically equivalent
model? No. In the end we could always replace our complex heterogeneities
with simpler ones. As an example, we could substitute bimodal models
for multi-modal data.

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Stanford Exploration Project

11/17/1997