How can I retrieve the V0 values at the wells in Velit?

You should be able to get a set of V0 values for your wells by doing the following method:

In the Optimise module:

edit-mode Select Edit Mode – Point

user-edit  From the Point Edit options that appear select User Edit

Click anywhere on the display. A User Point will be created and a box to edit the values for the User point will come up. Edit this to your V0 and K of the gradient of the curve you have:

new-optimise-values

Now in the XYZ tab of Optimise module set it as shown:

optimise-module

Note the Output X and Y will go into the named slots in the Model Tree for the Surface you are working with. Fixed Y has given fixed values of the K gradient, but the X values have gone into the Depth Conversion Intercept slot:

depth-conversion-intercept

Click on this XYZ slot and turn XYZ and XYZ label on under Layers Visible in the Surface Module

surface-module layers-visible