Processing seismic data

Details Processing seismic data Processing seismic data

2008-06-03

2008-06-03

Lobo, Ian J (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

C367S043000, C367S046000, C702S017000

Reexamination Certificate

active

07382682

ABSTRACT:
The invention relates to processing seismic data that contains both a desired signal and swell noise. The method is applicable to seismic data is in the frequency-space domain method and comprises determining a signal-only prediction filter from the seismic data at a first frequency at which swell noise is not present, and applying the prediction filter to seismic data at a second frequency at which swell noise is present. This attenuates swell noise in the seismic data at the second frequency.In one embodiment, the prediction filter for a frequency fL, the lowest frequency at which swell noise is present, is determined from seismic data at frequency fH+1, where fHis the highest frequency at which swell noise is present. The prediction filter for a frequency fL+1is determined from seismic data at frequency fH+2, and so on, so that the prediction filter for frequency fH+1is determined from seismic data at frequency f2H−L+1. In this way, the prediction filter for each frequency in the swell noise range is determined from seismic data outside the swell noise range, but at a frequency close to the swell noise range, and this provides effective extraction of the signal and attenuation of the swell noise. Furthermore, no prediction filters is applied to data of more than one frequency, so that an error in the determination of a particular prediction filter will have only limited effect on the processed data.

REFERENCES:
patent: 4310904 (1982-01-01), Ballard et al.
patent: 4397006 (1983-08-01), Galbraith, Jr.
patent: 4992995 (1991-02-01), Favret
patent: 5067112 (1991-11-01), Meek et al.
patent: 5191526 (1993-03-01), Laster et al.
patent: 5771203 (1998-06-01), Soubaras
patent: 6446008 (2002-09-01), Ozbek
patent: 6651007 (2003-11-01), Ozbek
patent: 2 337 591 (1999-11-01), None
patent: WO 99/60421 (1999-11-01), None
Anderson and McMechan, “Automatic editing of noisy seismic data,”Geophysical Prospecting, 37(8):875, 1989.
Cambois and Frelet, “Can we surgically remove swell noise?”SEG Geophysicists, pp. 1381-1384, 1995.
Canales, “Random noise reduction,”SEG Technical Program Expanded Abstracts, pp. 525-527, 1984.
Holcombe and Wojslaw, “Spatially weighted trim stacking: A technique for prestack noise,”SEG Geophysicists, pp. 1157-1160, 1992.
Spitz, “Adaptive dip filtering in theF-Xdomain,” SEG 63rdAnn. Intern. Mtg., pp. 1181-1182, 1993.
UK Search Report dated Apr. 9, 2003 for Application No. GB 0228260.6.
Watts et al., “Attenuation of marine wave swell noise by stacking in the wavelet packet domain,”SEG Expanded Abstracts, XX(XX):1-4, 1999.

Affiliated with

Also associated with

Rating

Processing seismic data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processing seismic data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processing seismic data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2813817