Limited radon transformations for removal of noise from seismic data

Patent 7948826 Issued on May 24, 2011. Estimated Expiration Date:

January 31, 2027. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventor

Wood, Lawrence C.

Application

No. 11700663 filed on 01/31/2007

US Classes:

367/47Amplitude

Examiners

Primary: Keith, Jack
Assistant: Breier, Krystine

Attorney, Agent or Firm

Willhelm; Keith B

Foreign Patent References

0 515 189 EP 11/01/1992
1094339 EP 04/01/2001
2801387 FR 05/01/2001
00/42448 WO 07/01/2000
02/059649 WO 08/01/2002
2004/020972 WO 03/01/2004

International Class

G01V 1/00

Abstract

Methods of processing seismic data to remove unwanted noise from meaningful reflection signals are provided for. The methods comprise the steps of assembling seismic data into common geometry gathers in an offset-time domain without correcting the data for normal moveout. The amplitude data are then transformed from the offset-time domain to the time-slowness domain using a limited Radon transformation. That is, the Radon transformation is applied within defined slowness limits pmin and pmax, where pmin is a predetermined minimum slowness and pmax is a predetermined maximum slowness. A corrective filter is then applied to the transformed data enhance the primary reflection signal content of the data and to eliminate unwanted noise events. After filtering, the enhanced signal content is inverse transformed from the time-slowness domain back to the offset-time domain using an inverse Radon transformation.

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