Spectral decomposition with extracted seismic wavelet
Rongfeng Zhang · 2013
In seismic interpretation, spectral decomposition has rapidly evolved from a niche technique to a common tool at work due to its distinguish advantages in channel delineation, gas reservoir detection and thin-bed interpretation. There are different approaches to do spectral decomposition but they are basically using one or more mathematical functions (sin/cosine, Morlet wavelet etc.) as the basis to convolve with seismic sampling data. Very often, the mathematical functions used deviate substantially from the actual seismic response underground. This causes the popular ringing effect in spectral decomposition results. It could interfere with or, even worse, lead to false interpretation. The author proposes a method that uses the real seismic wavelet to replace the mathematic functions to do spectral decomposition. The result from this method shows much less ringing effect and therefore less ambiguity for interpretation.