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ARTICLES:
Imaging
complex structures with first-arrival traveltimes
Imaging complex structures
with first-arrival traveltimes Dimitri Bevc I present a semi-recursive
Kirchhoff migration algorithm which is capable of obtaining
accurate images of complex structures using first-arrival
traveltimes. The method is successful because breaking up
the complex velocity structure into smaller depth regions
allows traveltimes to be calculated in simple regions where
they are well behaved, and where they correspond to energetic
arrivals. Because traveltimes are computed for simple depth
regions, the adverse effects of caustics and headwaves do
not develop, and multivalued arrivals are implicitly accounted
for in the migration.
4th SIAM Conference on
Mathematical and Computational Issues in the Geosciences,
Albuquerque, New Mexico, June 16-19, 1997.
Copyright
© 1997, Dimitri Bevc, dimitri@3dgeo.com
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