Abstract

Ground roll is the most persistent form of source generated coherent noise that obscures seismic signal and degrades the overall data quality. Most of the conventional ground rolls attenuation techniques use fixed parameterization and have limited success due to the rapid variability of near surface conditions. Finding an optimal method to attenuate ground roll has been a long goal in seismic data processing. The present study discusses the potential of a flexible approach of adaptive attenuation of ground roll. This data driven technique adapt to the changing noise characteristics and subtracts ground roll adaptively while preserving primary amplitudes. This method can be applied to attenuate ground roll in different domains, such as cross-spread or common shot/ receiver domain depending upon the data needs. The present study is based on application of this technique to raw 3D shot gather in cross spread domain. The efficacy of the process has also been compared with the conventional 3D FK filtering and it is observed that the present adaptive method has more potential to attenuates ground roll effectively and improves signal to noise ratio better.