DUG Insight User ManualFrequently Asked QuestionsFrequently Asked Questions Volumes and DataHow do I gain a volume between two horizons, using a spatially varying multiplier?

How do I gain a volume between two horizons, using a spatially varying multiplier?

In this workflow, we apply a gain to the values of a volume between two horizons. The amount of gain applied is defined by a third horizon.

It requires the following items loaded in the session:

  • The volume to scale
  • An upper bounding horizon
  • A lower bounding horizon
  • A horizon containing scalar (gain) values
  1. Create a Volume Maths process.
  2. Click the Volume (+) and select the volume to scale. Use the default variable name, “v1”.
    • This example uses a volume called “Velocity_tie_to_wells”.
  3. Click the Horizons (+) three times to and add three horizons:
    • h1: choose the upper-bound horizon.
    • h2: choose the lower-bound horizon.
    • h3: choose the  is the horizon (grid) based scale factor.
  4. Use the formula:
if (twt_ms > h1 && twt_ms< h2, (v1*h3), v1)
  1. The result of this process is a new volume, located in the Volume tab. Note: Use the CTRL-P hotkey to quickly switch between a process and its result volume.
  2. Go to View > New IL/CL View or 3D View to QC the result.