Patent ID: 6691075
Filing Date: 2004-02-10
Classification: G01V

Abstract:
A method for constructing a model seismic image of a subsurface seismic reflector, said method comprising the steps of:locating a set of source and receiver pairs to be used in constructing said model seismic image; determining a subsurface velocity function to be used in constructing said model seismic image; determining specular reflection points on said subsurface seismic reflector for each of said source and receiver pairs; determining a Fresnel zone on said subsurface seismic reflector for each of said specular reflection points, using said subsurface velocity function; selecting one or more seismic wavelets to be used in constructing said model seismic image; defining a set of image points containing said subsurface seismic reflector; determining a synthetic seismic amplitude at each of said image points by summing Fresnel zone synthetic seismic amplitudes for all of said Fresnel zones which contain said image point, using said one or more seismic wavelets; and constructing said model seismic image of said subsurface seismic reflector using said synthetic seismic amplitudes at said image points.