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Since we had a single profile of data, we would not be able to do more
than estimate the mean elastic properties of the material between the
two boreholes. However, Reinaldo Michelena had been working on a
1-component, multiple profile dataset, and this would be useful for
testing out ideas on anisotropic tomographic inversion methods.
This work is incomplete, but we have developed some ideas for a
practical scheme:
- Replace the conventional isotropic scheme with one based on
elliptic dispersion relations with vertical symmetry axes. This only
doubles the degrees of freedom for each wavetype, but is sufficient to
arrive at reasonable estimates of the elastic moduli of the material.
- Begin by estimating the best homogeneous model, and then, by a
divide-and-conquer technique, arrive at increasingly finely layered
models.
- If it proves necessary, use the final, finely layered output as
the input to a vertical divide-and-conquer scheme.
Next: CONCLUDING REMARKS
Up: PROCESSING PROCEDURES
Previous: Velocities to elastic moduli
Stanford Exploration Project
1/13/1998