Universal Journal of Physics and Application Vol. 11(5), pp. 144 - 149
DOI: 10.13189/ujpa.2017.110502
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Design of an Optimal High Pass Filter in Frequency - Wave Number (F-K) Space for Suppressing Dispersive Ground Roll Noise from Onshore Seismic Data


Adizua, O. F. *, Inchinbia, S. , Ekine, A. S.
Department of Physics/Applied Geophysics, Faculty of Science, University of Port Harcourt, Nigeria

ABSTRACT

The ultimate goal in seismic signal processing (pre- processing or main processing) is to enhance the signal to noise ratio (S-N-R). In this study, two high pass (low cut frequency) filters were designed in frequency - wave number (F-K) space and applied to onshore 3D seismic data acquired from a typical Niger Delta field to suppress dispersive ground roll in a bid to enhance S-N-R. The seismic shot records were initially displayed to show the seismic data ensembles in the conventional offset - time (X-T) domain. A frequency - wave number spectrum was then created using a VISTA software algorithm to analyze the spectral patterns of the signals and noise. Two high pass filters were then designed in the F-K space to mute the low frequency ground roll from the data. The filters were then applied to the entire seismic data ensemble for the filtering operation. The results obtained after the two filtering operations were compared to ascertain the optimal filter which was most effective for the suppression of the unwanted ground roll noise.

KEYWORDS
F-K Space, F-K Spectral Analysis, Dispersive Ground Roll, High Pass Filter, Muting

Cite this paper
Adizua, O. F. , Inchinbia, S. , Ekine, A. S. . "Design of an Optimal High Pass Filter in Frequency - Wave Number (F-K) Space for Suppressing Dispersive Ground Roll Noise from Onshore Seismic Data." Universal Journal of Physics and Application 11.5 (2017) 144 - 149. doi: 10.13189/ujpa.2017.110502.