Method and device for attenuating water column reverberations using co-located hydrophones and geophones in ocean bottom seismic processing

Patent 5774416 Issued on June 30, 1998. Estimated Expiration Date:

June 30, 2015. 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

2757356

2923367

3290645

3299397

3343626

3350683

3689874

Method of attenuating unwanted seismic reflections in underwater seismic exploration
Patent #: 3943484
Issued on: 03/09/1976
Inventor: Balderson

Method of marine reflection-type seismic exploration
Patent #: 3979713
Issued on: 09/07/1976
Inventor: Parrack

Combination geophone-hydrophone
Patent #: 4134097
Issued on: 01/09/1979
Inventor: Cowles

More ...

Inventors

Assignee

PGS, Tensor, Inc.

Application

No. 418507 filed on 04/07/1995

US Classes:

367/24, Reverberation removal367/49Frequency

Examiners

Primary: Moskowitz, Nelson

Attorney, Agent or Firm

Arnold; Gordon T.

Foreign Patent References

1 316 479 GB. 05/20/1973
2 004 648 GB. 04/20/1979
2 030 400 GB. 04/20/1980

International Class

G01V 001/38

Abstract

In ocean bottom seismic exploration, it is common for co-located hydrophones and geophones to be deployed on the ocean bottom. One problem encountered is the water column reverberation. An improved method and device is proposed for attenuating water column reverberations using co-located hydrophones and geophones in ocean bottom seismic processing. In this method, each recorded hydrophone and geophone signal, or trace, is decomposed into a series of narrow band-pass filtered traces. For each of the filtered traces, a measurement of the energy level is made upon which normalization factors are computed and applied. The resulting filtered, normalized traces are summed. Optionally, prior to application, the normalization factors can be organized by common shot, common group, common offset, and surface consistent normalization factors derived and applied for each pass-band.

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