oa Modeling by Demigration

Kirchhoff-type, isochrone-stack demigration is a natural asymptotic inverse to classical Kirchhoff, diffraction-stack migration. Both operations can be made true amplitude by an appropriate selection of weight functions. Isochrone-stack migration can be also used for modeling purposes. The idea is to attach to each reflector in the model a spatial wavelet with an appropriate stretch and reflection coefficient, so that the model has the form of a true-amplitude migrated section. The modeling is then realized by a true-amplitudec demigration operation. An example of a simple case is computed and the results are discussed.