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US 4,594,693 AGranted
Seismic trace interpolation using f-k filtering
AssigneeMobil Oil Corporation
InventorsKeh Pann, Jerry L. Fields
Life of this patent
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Abstract
In seismic exploration, aliasing caused by coarse sampling along a line of exploration is corrected by trace interpolation. The interpolated traces are obtained by inserting zero amplitude traces between seismic traces. Transformation into the f-k domain and filtering of the aliased regions in the f-k domain produces properly interpolated traces when transformed to the x-t domain.
Claims7
In seismic exploration of the earth's formations, the method of suppressing aliasing caused by coarse sampling along a line of exploration comprising:
- gathering seismic traces representing the amplitude of seismic reflections as a function of time and distance along said line of exploration;
- inserting zero amplitude traces between said seismic traces;
- transforming said traces into an f-k array of digital samples representing amplitude as a function of frequency and wave number;
- filtering said f-k array with a filter which mutes all samples in a region of frequency and wave number which has aliasing;
- and
- transforming the filtered f-k array into a seismic section representing amplitude as a function of time and distance.
3 more elements
Dependencies are inferred from the claim text.