Method and system for limited frequency seismic imaging

Details Method and system for limited frequency seismic imaging Method and system for limited frequency seismic imaging

2005-02-22

2005-02-22

McElheny, Jr., Donald (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Earth science

Reexamination Certificate

active

06859734

ABSTRACT:
The method and system of the present inventions provides a new approach for selecting frequencies comprising a minimal or limited frequency data set for imaging leading to an order of magnitude decrease in computation resources. Seismic data are acquired and transformed a frequency domain. The data may be gathered in any manner. A plurality of minimal frequency subsets are formed comprising selected frequencies. The frequencies may be selected so that more frequencies are selected for shallower image positions. The selected frequencies are imaged to form frequency images. The selected frequencies may be individually weighted to assure a full and balanced bandwidth. The frequency images are composited to form an intermediate or final composited migration image.

REFERENCES:
patent: 5734829 (1998-03-01), Robinson
patent: 5995904 (1999-11-01), Willen et al.
L. Sirgue et al.;Frequency Domain Waveform Inversion: A strategy for choosing frequencies, EAGE 63rd Conference & Technical Exhibition—Amsterdam, The Netherlands, Jun. 11-15, 2001, pp. 1-4, 5 Figs.
L. Sirgue etal.;An optimal choice of temporal frequencies for imaging: application to waveform inversion, 71st Ann. Internat. Mtg.: Soc. of Expl. Geophys., pp. 698-701, 7 Figs.
R.-E. Plessix et al.,Frequency-domain finite-difference migration with only few frequencies?, 71st Ann. Internat. Mtg.: Soc. of Expl. Geophys., pp. 1103-1106, 9 Figs.
Robert W. Clayton et al.;A Born-WKBJ inversion method for acoustic reflection data, Geophysics, vol. 46, No. 11 (Nov. 1981) pp. 1559-1567, 3 Figs.

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