Patent ID: 6092025
Filing Date: 2000-07-18
Classification: G01V

Abstract:
A method for determining strike and dip of a plane for association with a reflection point on a subterranean surface, wherein said method for determining is based on seismic amplitude analyses of common depth point (CDP) gathered seismic traces included in a three-dimensional (3D) seismic survey, said method comprising:(a) cross correlating each of eight perimeter traces with a central trace for a plurality of lags, wherein said eight perimeter traces and said central trace are reflected from a three-by-three array of nine reflection depth points in said seismic survey;(b) fitting said plane to a plurality of amplitude events of traces reflected from said array of nine depth points so as to optimize cross correlation coherency of said eight traces with said central trace over a predefined time window;(c) determining a strike and dip for the optimum position of said plane as determined in step (b);(d) associating said strike and dip determined in step (c) with said central point in said array of nine reflection depth points; and(e) repeating steps (a) through (d) for a plurality of reflection points.