Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Patent
1997-08-22
2000-03-07
Assouad, Patrick
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
702 16, G06F 1900
Patent
active
060352566
ABSTRACT:
A hybrid wavefront generator for bridging shadow zones for use with Kirchhoff migration. A graticule of travel-time grid points is mapped over a velocity model of an area of interest. The data assigned to each travel-time grid point are initialized using a unique code. By use of a conventional travel-time generator, wavefront travel times are calculated for the respective travel-time grid points. The calculated travel time, if valid, replaces the unique code previously resident therein. Wavefront travel times are re-evaluated for each travel-time grid point using a finite-difference travel-time solver. The quantity resident in each travel-time grid point is examined. If the quantity found is the unique initialization code, the unique initialization code is replaced by the re-evaluated finite-difference travel time. If a valid wavefront travel time is found, no further action takes place.
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Assouad Patrick
Taylor Victor J.
Western Atlas International Inc.
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