Academic Journal
Ground roll attenuation using the S and x-f-k transforms.
| Taitara: | Ground roll attenuation using the S and x-f-k transforms. |
|---|---|
| Ngā kaituhi: | Askari, Roohollah, Siahkoohi, Hamid R. |
| Puna: | Geophysical Prospecting; Jan2008, Vol. 56 Issue 1, p105-114, 10p, 14 Graphs |
| Whakarāpopotonga: | Ground roll, which is characterized by low frequency and high amplitude, is an old seismic data processing problem in land-based seismic acquisition. Common techniques for ground roll attenuation are frequency filtering, f-k or velocity filtering and a type of f-k filtering based on the time-offset windowed Fourier transform. These techniques assume that the seismic signal is stationary. In this study we utilized the S, x-f-k and t-f-k transforms as alternative methods to the Fourier transform. The S transform is a type of time-frequency transform that provides frequency-dependent resolution while maintaining a direct relationship with the Fourier spectrum. Application of a filter based on the S transform to land seismic shot records attenuates ground roll in a time-frequency domain. The t-f-k and x-f-k transforms are approaches to localize the apparent velocity panel of a seismic record in time and offset domains, respectively. These transforms provide a convenient way to define offset or time-varying reject zones on the separate f-k panel at different offsets or times. [ABSTRACT FROM AUTHOR] |
| Ngā kupu marau: | SEISMIC prospecting, FOURIER transforms, FOURIER analysis, GEOLOGICAL statistics, GEOPHYSICS |
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| ISSN: | 00168025 |
| DOI: | 10.1111/j.1365-2478.2007.00659.x |
| Pātengi raraunga: | Complementary Index |
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