472 Posts in 232 Topics by 68 members
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|Author||Topic: Residual velocity analysis||3597 Views|
29 August 2013 at 5:24am Last edited: 30 October 2013 9:53pm
I would like to carry out a residual velocity analysis on pre-stack time-migrated cdp gathers. Is there an easy way to do this in Claritas?
1 September 2013 at 4:20pm Last edited: 1 January 2014 4:51am
The inclusion of a residual moveout analysis feature in our CVA application is in the development backlog and being look into. Currently in GLOBE Claritas the NMO correction needs to be removed from the pre-stack time migration gathers (as well as stacking them) before the velocities can be re-picked in CVA.
19 September 2013 at 3:26am Last edited: 2 January 2014 11:59pm
It would be nice to see this in a future implementation. What I am doing at the moment is to remove the nmo correction after pre-stack migration (using the migration velocity). Then I look at the semblance of these gathers and refine the velocity model in cva. I wasn't sure if it is the correct thing to do.
19 September 2013 at 4:20pm Last edited: 23 February 2014 9:03pm
Your workflow is exactly how we do things at present with post migration velocity updates.
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