Find DHIs with Optical Stacking
When you’re looking for DHI’s, sometimes a simple tool can get surprisingly good results. In the right structure, optical stacking will highlight flat spots and contacts.
This workflow generates an optical stack by averaging samples in a direction. It works in time or depth, but it’s best done in depth to avoid velocity effects from shallower intervals.
- In the Control Panel > Process tab, click the blue "+" button and add a Volume Smoothing process.
- Type a name e.g. "Optical Stack (inline)".
- Select the Volume to stack.
Spatial distance in the IL direction (changing CL): 0 metres
- Note: stacking in IL direction changes CL.
Spatial distance in the CL direction (changing IL): 1000 metres
- Note: stacking in CL direction changes IL.
- Vertical smoothing radius: 0 ms
Optical stacking in any direction
By creating an arbitrary 3D survey, we can optically stack in any direction. We use Volume Resample to project the original data onto a rotated survey. We then follow the same process as above.
- Draw an arbline in the direction you wish to stack
- Create a dummy 3D survey using survey configuration.
- Match the orientation to the arbline direction.
- Open Volume resampling.
- Resample stack data to new rotated 3D survey.
- Choose stack data and new rotated 3D survey.
- Add resampled volume as input to volume smoothing process and follow workflow above.