Watch videos of Presentations from SEG 2017
Using Attributes to Interpret the Environment of Deposition - A Video Course. Taught by Kurt Marfurt, Rocky Roden, and ChingWen Chen
Dr. Kurt Marfurt and Dr. Tom Smith featured in the July edition of AOGR on Machine Learning and Multi-Attribute Analysis
Rocky Roden and Ching Wen Chen in May edition of First Break - Interpretation of DHI Characteristics using Machine Learning
Seismic interpretation and machine learning by Rocky Roden and Deborah Sacrey, GeoExPro, December 2016

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Envelope Bands on Envelope Breaks

Attribute Description: The Envelope Breaks trace reflects the minimums in the Envelope.  The Envelope Bands (Energy Bands) give the average energy of the envelope between adjacent pairs of Envelope breaks.  This identifies regions of strong energy. Since this is using Envelope Breaks, the discontinuities are not always as sharp as the phase breaks.

The upper trace is normal amplitude. The lower trace shows Envelope Bands on Envelope Breaks

The upper trace is normal amplitude. The lower trace shows Envelope Bands on Envelope Breaks

Interpretation Use:  This attribute may provide value by:

  • Identifying major units of strong energy and thus weak energy
  • Showing boundaries of sequences and depositional environments
  • Showing discontinuities and faults

Colorbar:

For this example, we use a colorbar that highlights the higher energy zones in the seismic. Since this is based on Envelope Breaks – it tends to be lower frequency by nature. Note the values are positive.

Example colorbar with an amplitude spectrum

Example colorbar with an amplitude spectrum

Example:

Vertical seismic display of Envelope Bands

Vertical seismic display of Envelope Bands

Time slice displaying Envelope Bands

Time slice displaying Envelope Bands

Frequency Spectrum

Frequency Spectrum

Computation: The Energy bands on envelope is similar to energy bands on phase breaks.  This attribute integrates by summing the envelope signal between envelope troughs.

Envelope Bands on Envelope Breaks - 06.png

This result is the envelope bands on envelope.

References:

  • Taner, M. T., 2001, Seismic attributes:  Canadian Society of Exploration Geophysicists Recorder, 26, no 7.
  • Tom Smith, 2017, Paradise Instantaneous Attributes