Random and coherent noise (ground-roll/ Rayleigh wave) suppression in seismic data

What is it about?

Separating linear coherent noise, such as ground roll from reflections, remains a key challenge in seismic processing. By adapting the Redundant Lifting Scheme (RLS), which is a wavelet transform method, to seismic data, we show how the wavelet domain can be used to suppress both coherent and random noise.

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Why is it important?

The proposed RLS based de-noising method is that it has minimal effects on the lower end of signal frequency spectra, and could be as a valuable tool in a processor’s toolbox when data preconditioning for advanced processing such as waveform inversion, which benefits from low-frequencies, is desired.