[OpendTect_Users] Neural Network Fault Cube Questions

[Nicola Scarselli]

Hi Paul,

> 
> 1) In order to run NNFC you need to provide a steering cube. Which is the one to use between background and detailed? Which are the parameters suggested for calculating such steering cube? 
> 
> Typically we use background steering cubes as inputs for dip-steered filters and detailed steering cubes when we want to preserve details in attribute calculations. More information on steering cubes and parameters can be found in this webinar on the subject: http://www.opendtect.org/tutorials/Webinar_Optimal_Steering .
Which one do you recommend in the end for NNFC?
 
> 
> 2) I noticed that my NNFC fails in areas of very steep reflectors - even if these areas are not faulted at all, my NNFC reports very high fault probability there. Is there any attribute I can add/remove/change to the process in order to address this problem? 
> 
> You could try including picks of "non-faults" in steeply dipping areas and see if the NN can learn to distinguish these picks from picks at real faults. If "polar dip" is not in your attribute set yet, I recommend including that.
This is what I was doing - maybe I need to pick more "non-faults" in dipping areas?

Thank you very much for your precious advices.

Nicola

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