Patent ID: 6253157
Filing Date: 2001-06-26
Classification: G01V

Abstract:
A method for constructing an instantaneous seismic velocity model for a designated subsurface region from available measured data, said method comprising the steps of:(a) determining seismic velocity data for said designated subsurface region from said measured data, said seismic velocity data being associated with a certain domain;(b) defining a discrete set of parameters to be used in said instantaneous velocity model;(c) defining a method for interpolating said instantaneous velocity, between values generated from said velocity model, to produce a velocity value at any desired spatial location in said designated subsurface region;(d) initializing said instantaneous velocity model;(e) selecting a parameter from said set of parameters;(f) adjusting said selected parameter;(g) forward modeling from said instantaneous velocity model to predict velocity data in said domain; and(h) performing a comparison of said model-predicted velocity data with said velocity data determined from measured data and repeating steps (e)-(h) until said predicted velocity data approximates said measured velocity data.