The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2000
Filed:
Aug. 22, 1997
Goran Milan Stankovic, Houston, TX (US);
Western Atlas International, Inc., Houston, TX (US);
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.