Patent ID: 6128581
Filing Date: 2000-10-03
Classification: G01V

Abstract:
A method of processing a seismic survey data set including: an actual source location, an actual receiver location, and an actual reflection event location, wherein the actual source location and actual receiver location are over a first layer having a first layer velocity and a first layer ray parameter and over a second layer having a second layer velocity different from the first layer velocity and a second layer ray parameter different from the first layer ray parameter, and the actual reflection event location is located below the first layer, the method comprising:providing the first layer velocity;providing the second layer velocity;providing the first layer ray parameter;providing the second layer ray parameter;determining a correction factor for the position of a ray path end dependant upon the first and second layer velocities and the first and second layer ray parameters; andapplying said correction factor to said ray path end, wherein a ray path-corrected ray path end is provided;wherein said ray path end comprises a member of the group consisting of: an actual source location, an actual receiver location, and an actual reflection event location; andwherein said ray path corrected ray path end comprises a member of the group consisting of: a ray path corrected source location, a ray path corrected receiver location, and a ray path corrected reflection event location.