The well deviation is a list of the measured well angles down the well.
This tutorial shows you how to enter a well deviation for a well:
You only need to enter a well deviation for a well if the well is not vertical throughout.
The well deviation is used to create the geometry configuration for a deviated well.
If you are not sure what to do here, review the tutorial to enter a geometry configuration.
Click 
 (top left).
Create a new well called MY DEVIATED WELL read how. Make up values for Elevation and RKB height.
In the sample database, click Well deviation under 
.
Right-click in the empty row under Description to pop up a menu; click New.
Enter this data:

Click 
 to check, apply and save the data, then exit.