Attribute Description: The Sweetness attribute is an empirical formula, originally introduced in 1997 by Oliveros and Radovich, that is designed to highlight sweet spots that are frequently associated with sand shales as well as gas saturated sands. Note that the amplitudes are all positive.
Interpretation Use: This attribute may provide value by
- Help identify sand shales and gas saturated sands
- Used to reduce risk assigned to DHI’s
Since the distribution of this data is weighted more towards the bottom of the colorbar but can be modified to highlight areas considered prospective.
Computation: The formula is comprised of the trace envelope divided by the square root of instantaneous frequency:
Instantaneous frequency is a derivative of instantaneous phase with respect to time and can be negative, positive, or zero due to spikes in the data. To eliminate the negative and zero values caused by data spikes, prior to calculating Sweetness, the negative and zero values are clipped and replace with values interpolated from neighboring times
- Taner, M. T., 2001, Seismic attributes: Canadian Society of Exploration Geophysicists Recorder, 26, no 7.
- Oliveros, R.B., and B. J. Radovich, 1997, Image-processing display techniques applied to seismic instantaneous attributes on the Gorgon gas field, North West Shelf, Australia; 67th Annual International Meeting, SEG, Expanded Abstracts, 2064-2067.