Abstract
Summary In performing seismic migration from the Alberta foothills, we used three popular imaging methods, Kirchhoff, reverse-time, and f-x depth migration. Migration results from real data demonstrated that despite inaccurate velocity models from the initial interpretation, once a reliable structural stack was available, each met hod could provide us with a reasonable post-stack depth migration result. Through relative comparisons among these three algorithms, the method based on the Kirchhoff integral proved to be the most viable of the three methods for seismic imaging of complex geologic structures - with respect to imaging robustness, computational efficiency, as well as target-oriented capability. The post-stack depth migration obtained will be an intermediate result, which would be subsequently used to get a relatively accurate velocity model for pre-stack depth migration. With an accurate velocity field available and with advanced computer technology, these migration methods will make a new improvement in subsequent 3-D pre-stack depth migration.
Published Version
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