April: Sweetness

Sweetness is a frequency weighted amplitude seismic attribute that was developed in the late 1990's. Sweetness is the amplitude envelope (reflection strength) divided by the square root of the instantaneous frequency. Seismic data that exhibit high amplitudes with low frequencies exhibit high sweetness. Sweetness works best in geologic settings where there is a good contrast in the acoustic impedances between sands (brine or hydrocarbon filled) and shales. Sweetness has been found to be useful in detecting channels or other stratigraphic features as well as enable a semi-quantitative evaluation of thickness (Hart, 2008).

May: Normalized Amplitude

Normalized Amplitude seismic attribute is the cosine of the instantaneous phase. This seismic attribute found in Rock Solid Attributes is similar to the instantaneous phase in that it displays strong and weak events with equal strength for interpreting continuity of bedding.

June: Trace Envelope

Trace Envelope has been given numerous names including: reflection strength, amplitude envelope, instantaneous amplitude, and energy envelope. The trace envelope represents the total instantaneous energy of the complex seismic trace and is independent of phase and always positive. Initially developed for the oil industry by Nigel Anstey in the 70's (popularized by Taner, Sheriff and Koehler) to help identify "bright spots" related to hydrocarbon accumulations.

July: Running Sum

Running Sum is the integration or adding of seismic amplitudes on a seismic trace. It is the cumulative sum of amplitude values starting from the top to the end of the trace.

August: Instantaneous Phase

Instantaneous Attributes relates to the propagation phase of a seismic wave front and is a measure of the continuity of events on a seismic section. Since wave fronts are usually considered lines of constant phase, the phase attribute can be considered a physical attribute and useful in discriminating geometrical shapes.

September: Color Inversion

Colored Inversion is a relatively simple and robust method to transform migrated seismic data into a band-limited acoustic impedance volume by shaping the mean seismic spectrum into the impedance log spectrum. This approach only gives a relative acoustic impedance which does not contain any low frequency components.

September: Spectral Decomposition

Spectral Decomposition breaks down the seismic signal into its component frequencies. Therefore, the highest amplitudes at any specific frequency (tuning thickness) relative to the other frequencies represents the acoustic response to thickness.