Topic:
How to load Synthetics in segy format. 

Description:
 

Solution:
Procedure:

1.) Select Seismic > Load Seismic.

2.) Select the "SEGY Synthetic" file format. (Other format options on this
    toggle switch include User defined 3D, User defined 2D, AutoLoad all,
    AutoLoad Select.)

3.) Click on 'Define Storage'.
   - First, enter a class of data for the synthetic. A class is required because
     this is seismic data, but it also allows display of the synthetic
     elsewhere. Try to use a term that is meaningful and memorable, that you
     can apply to other synthetics of the same type (for example, syn, synth,
     synth_curve, curvature).
   - Set the data storage format. The data storage format defaults to 8 bit,
     which is normally used. 
   - Assign the synthetic to a well, by scrolling down the list and selecting 
     the proper well, using MB1.
   - Click Ok.
 
4.) Click on 'Define Input Format'.
   - Normally you can take the defaults that are presented for format
     specifications, because the defaults are set for SEGY data.
   - Occasionally, you may find that you need to include a delay on the time to 
     first sample (TFS). If the synthetic does not align at the proper time, 
     adjust the time of first sample by toggling "Header TFS convention" to 
     Delay (since time zero) or Use Value to override information in the header 
     file.
   - For the disk file name, be sure to enter the full path location and 
     file name of the synthetic to be loaded.

5.) Once the loading mode is set, you can save the loading definition for future
    synthetics. Click 'Save As' to give the loading definition a name and 
    description.

6.) Click on 'Load'.
   - The parameters will be checked and the status given in a pop-up window. If 
     no errors are found, press continue. If any errors are found, they will be 
     listed in the window. Clicking continue will return to the loading 
     definition window in this case.
   - A progress report will show how many traces have been loaded, the time
     elapsed, and will notify when the loading is complete. A loading 
     definition log (sdilog_date_time) is written to the user's home directory 
     (/users/userid).

Check that Synthetic loaded correctly:

Once the synthetic is loaded, be sure that you can see it on a seismic display.
In Seis3DV, select Define > Well Appearance > Vertical.  At the bottom of the
panel, choose 'Synthetic Options'. 

    - Toggle on 'Display Synthetics' at the top left. 
    - Toggle on 'Display formations' at the center left. 
    - Turn off 'Along Borehole', as this can cause display problems. 
    - Select the synthetic class, if more than one exists. 
    - Change the color, amplitude, number of traces, and other display features
      as desired.  

 



Last Modified on: 04-DEC-98