Efficiency of complex trace analysis to attenuate ground-roll noise from seismic data


Kahrizi A., Emdadi M., KARSLI H.

JOURNAL OF APPLIED GEOPHYSICS, cilt.106, ss.50-59, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 106
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.jappgeo.2014.04.013
  • Dergi Adı: JOURNAL OF APPLIED GEOPHYSICS
  • Sayfa Sayıları: ss.50-59

Özet

Ground-roll, characterized by low frequency and high amplitude, is one of the most important issues in seismic data processing. Common methods to eliminate ground-roll noise from seismic data include frequency-based methods which pose filtering the whole signal. In addition, assuming being stationary signal which attended in filter is another disadvantage of those methods: however, in this paper a new method based on using Hilbert transform to address high-amplitude, low-frequency coherent noise is proposed. In this respect the conventional seismic trace can be viewed as the real component of a complex trace. Therefore, its envelope and normalized phase, as the input of running average, are easily calculated. On the other hand, complex trace-based filtering is approached to be a method distinguishing between coherent noise and reflections overlapping each other. This is done by setting a suitable length of window on running average in order to extract low frequency components from data. (C) 2014 Elsevier B.V. All rights reserved.