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() describe three
possible ways to perform residual migration.
The most precise method is an exact derivation
which involves the combination of the , and parameters.
This method attempts to simultaneously correct the effect of
two inaccurate velocity fields.
Assuming that the initial migration was done with
the velocities v0p and v0s, and that
the correct velocities are vmp and vms, we
can then write
Solving for in the
first equation of () and substituting it
in the second equation of (), we obtain
the expression for prestack Stolt depth residual migration
for converted waves:
| |
(115) |
where is the transformation kernel defined as:
and , , and .
This formulation depends only on velocity ratios. This fact implies that
it is a valid formulation for non-constant velocity media, as suggested
by ().
Next: Methodology
Up: R. Clapp: STANFORD EXPLORATION
Previous: Introduction
Stanford Exploration Project
11/11/2002