Topic:
How to sum amplitudes for a peak and a trough horizon.

Description:
 

Solution:
1.) Grid the horizons. Select > Horizon > select horizon and amplitude > select
    contour icon. Repeat for each horizon.

2.) Grid Operations > Combine.
   - Toggle Grid Operation to Add.
   - Type in -1 for Scale for Grid #1 (trough).
   - Toggle Input Grid to List.
   - Type in name for Resultant Surface Name.
   - Toggle Set Fault Handling accordingly if user has fault traces.
   - Toggle Grid Extent Handling to Grid 1 or 2 (select grid representative of
     area of interest)
   - Toggle Grid Null Handling accordingly and Exit.

3.) Select trough grid first, select yes to confirm, then select peak grid 
    second and select yes to confirm.

4.) Select contour icon to display.




Last Modified on: 04-AUG-98