Basic PSDM with velocity analysis :
use rayt2d and sukdmig2d to compute 2D PSDM in SU.
You get depth image gathers that you can convert in time (suztot) and perform a new
velocity analysis, convert the new velocity model in depth with velconv adn migrate again.
Stop... when the image gathers are flat enough. (the Deregowski loop)
Start with a smoothed velocity model obtained after time imaging or even a constant
average velocity model.
sukdmig2d also has options for migration velocity analysis but I'm not used to this
procedure
D.
De: "Glenn Reynolds"
<gdreynolds(a)gmail.com>
À: "seismic unix" <seisunix(a)mailman.seismic-unix.org>
Envoyé: Vendredi 21 Juillet 2023 11:56:39
Objet: [Seisunix] PSDM Flow
Does anyone have a basic flow for PSDM?
Another user has asked about a detailed interval
velocity model, and has gathers
that can be used.
There was an exercise a few years ago where people did
PSDM on a land line,
which generated a velocity model.
I'll post a separate question on velocity
interpolation and conversion.
Cheers
Glenn
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