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Migration Velocity Analysis By Double Path-Integral MigrationNormal access

Authors: J. Schleicher and J.C. Costa
Event name: 11th International Congress of the Brazilian Geophysical Society
Session: Seismic Processing: Migration
Publication date: 24 August 2009
Organisations: SBGf
Language: English
Info: Extended abstract, PDF ( 679.44Kb )

Summary:
The idea of path-integral imaging is to sum over the migrated
images obtained for a set of migration velocity models.
Those velocities where common-image gathers align
horizontally are stationary, thus favoring these images in
the overall stack. In this way, the overall image forms with
no knowledge of the true velocity model. However, the velocity
information associated with the final image can be
determined in the process. By executing the path-integral
imaging twice, weighting one of the stacks with the velocity
value, the stationary velocities that produce the final image
can then be extracted by a division of the two images. A
numerical example demonstrates that quantitative information
about the migration velocity model can be determined
by double path-integral migration.

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