How do I colour a volume differently between horizons?

This workflow allows for flexibility in colouring the different stratigraphy in your volume.

Use Volume Maths process to fill values between horizons

Use Volume Maths process to fill values between horizons
  1. Create a Volume Maths process. In this example, we name it "Layer Fill".
  2. Add each of the horizons to define the layers. It will be easier if the horizons are correctly sequenced.
  3. Construct an if statement using the following structure:
    • if TWT above A, use value 1, otherwise
    • if TWT above B, use value 2, otherwise
    • if TWT above C, use value 3, otherwise use value 4

The actual formula looks like this:

if (twt_ms < a, 1,
  if (twt_ms < b, 2,
    if (twt_ms < c, 3, 4)
  )
)
  1. Finally, choose a nice colourbar and set the range from 0 or 1 to your maximum value.
  2. If you would like to overlay the results, create a group containing the "Layer Fill" virtual volume, put that layer at the top of the group, and adjust its transparency in the class settings.

Here are the results achieved using a quick test: