Envelope Bands on Phase Breaks
Attribute Description: The Phase Breaks trace reflects the discontinuities in the phase. The Envelope Bands (Energy Bands) give the average energy of the envelope between adjacent pairs of phase breaks. This identifies regions of strong energy.
Interpretation Use: This attribute may provide value by:
- Identifying areas of strong energy and thus weak energy
- Showing boundaries of sequences and depositional environments
- Showing discontinuities and faults
Recommended Colorbar: Since this is an average of envelope between phase discontinuities, the same colorbar for phase discontinuities or envelope can work. The colors are designed to focus on the higher energy intervals in the seismic. Note the values are positive.
Computation: The energy bands on phase breaks attribute integrates by summing the envelope signal between adjacent pairs of phase breaks. Where the envelope is small the integrated value is small and the block value assigned to each sample between pairs of phase breaks is small. If the envelope is large, the block envelope value between phase breaks is large. This type of attribute helps identify regions of strong energy. The computation steps are as follows.
Integratee the envelope signal between an adjacent pair of peak pick times amd tp yield a value which will be assigned as a constant to all samples in that range (δ(tj)) and repeat these integration / assingment steps for each park of pick times (2 to N).
This result is the energy bands on phase breaks attribute.
For a more detailed explanation of Banded attributes and how they are calculated, read the “Banded Attribute Overview” help document.
- Taner, M. T., 2001, Seismic attributes: Canadian Society of Exploration Geophysicists Recorder, 26, no 7.
- Tom Smith, 2017, Paradise Instantaneous Attributes