Next: RMO analysis in ADCIGs
Up: Residual moveout in anisotropic
Previous: Generalized migration
In 2-D, ADCIGs are computed for each midpoint by applying a
slant-stack decomposition to the prestack image along the
subsurface-offset axis. The kinematics of the angle-domain
transformation are defined by the following change of variable:
| ![\begin{eqnarray}
\widehat{\gamma}
&=&
\arctan
\left.
\frac{\partial z_\xi}{\part...
...i},
\\ z_{\widehat{\gamma}}
&=&
z_\xi-h_\xi
\tan \widehat{\gamma},\end{eqnarray}](img7.gif) |
(1) |
| (2) |
where
is the transformed image-point depth.
Assuming flat reflectors and VTI media,
Biondi (2005a) demonstrates that the angle
is equal to the phase aperture angle
, thereby simplifying
equations 1 and
2:
| ![\begin{eqnarray}
\widetilde{\gamma}
&=&
\arctan
\left.
\frac{\partial z_\xi}{\pa...
...\\ z_{\widetilde{\gamma}}
&=&
z_\xi-h_\xi
\tan \widetilde{\gamma}.\end{eqnarray}](img11.gif) |
(3) |
| (4) |
Next: RMO analysis in ADCIGs
Up: Residual moveout in anisotropic
Previous: Generalized migration
Stanford Exploration Project
5/6/2007