||Imaging complex structures with first-arrival traveltimes||
Up: Reproducible Documents
Published as SEP Report, 84, 1-10 (1995)
Imaging complex structures with first-arrival traveltimes
I present a layer-stripping Kirchhoff migration algorithm which is
capable of obtaining accurate
images of complex structures by downward continuing
the data and imaging from a lower datum.
I use eikonal traveltimes in a Kirchhoff datuming algorithm for the
downward continuation. After downward continuation, I perform
The method alternates steps of datuming and imaging. Because traveltimes
are computed for each step, the adverse effects of caustics, headwaves, and
multiple arrivals do not develop.
In principal, this method only requires the same number of
traveltime calculations as a standard migration.
Tests on the Marmousi data set produce excellent results.