Seismic attributes, such as amplitude, are often mapped on horizons that have been tracked as peaks or troughs. In some instances, the attributes of a geologic bed are desired, even though that bed may not correspond directly to a specific peak or trough. In these cases, the interpreter may resort to the use of “phantom” horizons—ones that are based on a horizon that can be tracked (as a peak or a trough), and then displaced in time an appropriate amount to correspond to the geologic bed of interest. This approach can be useful, but because the tracked horizon and the...

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