Volume Derivative

Description Calculate the first or second derivative of a trace using the finite difference method.
Module(s) Explorationist, Image Gather Processes
Requirements Volume
Related Velocity Model
Works with 2D, Stacks, Gathers

The Volume Derivative process calculates the first or second derivative of a trace using the finite difference method.

Create a Volume Derivative process

Create a volume smoothing process
  1. In the Control Panel, open the Process tab.
  2. At the tab header, click the Add icon and select New Process.
  3. Scroll down and double-click on Volume Derivative.
  4. Type a name for the process and click OK.

Calculate the derivative of a trace

Smooth a 2D/3D volume
  1. In the Details Panel, select a Volume.
  2. Select the Order:        
    • First derivative: Calculate the first derivative of the trace.
    • Second derivative: Calculate the second derivative of the trace.

As a result of this process, a new volume is available in the Volume tab.

Note: The derivatives are calculated using a central finite difference method.

  • The first and last values of the first derivative are calculated using the forward and backward finite difference respectively.
  • The first and last values of the second derivative will be null (NaN).