2-D Dip Moveout (DMO)
Know that prestack migration is equivalent to DMO and poststack migration for constant velocities.
Know that DMO (constant velocity) enables all dips to be MO’d with the same (RMS) velocity i.e. NMO.
Know that DMO (constant velocity) eliminates dip smear.
Know that constant velocity assumption may be extended to areas with smoothly varying velocities.
Understand the basic DMO algorithms.
Become aware that some DMO algorithms are available for variable velocities.
Be able to identify the different types of processes referred to as DMO.
Figures & Tables
A Practical Understanding of Pre- and Poststack Migrations: Volume 2 (Prestack)
This volume, SEG Course Notes Series No. 14, is designed to give the practicing geophysicist an understanding of the principles of prestack migration, presented with intuitive reasoning that avoids difficult math. Modeling with common-shot record and a constant-offset section are used to introduce prestack migration. New material in this revised edition of the original 1998 book includes algorithms that lead to and include Claerbout’s inversion method.