Prestack Reverse Time Migration of Shot Profiles
, by John T. Etgen
This paper presents a method for the migration of shot records. It is
based upon previous work on the migration of stacked data. The method is
a full depth migration allowing for velocity to vary laterally as well
as vertically and has no dip limitations. Because two-way wave propagation
is desired and the goal is to migrate primaries only, a matched impedance form of the scalar wave equation is
used to suppress internal reflection (Baysal et. al.,1984).
The method is implemented with high-order finite differences as discussed
in the previous paper (Etgen, 1986).
A synthetic example is shown demonstrating
the method for a simple model with 2 reflectors. The method
is applied to field data from the Gulf of Mexico
in another example.