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|Author||Topic: Forward and inverse depth conversion and Vrms to Vint||3091 Views|
19 September 2013 at 5:09am Last edited: 23 February 2014 2:49pm
I have come across a problem that I thought other people might be interested in. Sometimes it may be necessary to import a velocity model from e.g. wide-angle inversion to use for migration. Of course a wide angle velocity model would be provided as Vint/depth, but some modules, e.g. KPRET2D require Vrms/TWT. Although in Claritas it is easy to go from TWT to depth and Vrms to Vint, there seem to be no tools to do the opposite. Or are there?
I have written a short matlab script that can do this for GMT grids. It is attached to the post. I'd be happy if other people looked at it to see if I made any mistakes. It is very basic at the moment, but it does the job. Are there any plans to include something like this in isovels?
19 September 2013 at 5:54pm Last edited: 24 February 2014 9:03am
In terms of Depth to Time conversions the Claritas TDCONV1 module will do an inverse Depth to time conversion, obviously your velocity field would need to be supplied as a SEGY or CSEGY dataset.
For the INT to RMS conversion you will need to use the RMSINT applictation which has a -i switch to force the inverse conversion from Interval to RMS.
Hopefully this will be useful.
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