There is a rich history of using differential measurements to improve the signal-to-noise (S/N) ratio when there is correlated signal to improve the signal-to-noise ratio. With respect to seismic amplitude measurements, this is done in a practical sense by comparing the amplitude of reflections on structure to those off structure, or by comparing anomalous amplitudes to an average background. In fact, anomalous is defined in reference to the background. While this is intuitively the thing to do, the value of this methodology needs to be calculated by the quantitative effect on risk and uncertainty and the interaction of this effect with business decisions. It is only by influencing the business decisions with the information that value is realized.

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