Patent ID: 6314371
Filing Date: 2001-11-06
Classification: G01V

Abstract:
A method for processing data from dual sensor receivers to produce a combined seismic trace, wherein the method comprises:receiving a first seismic trace from a geophone in a dual sensor receiver;transforming the first seismic trace into a first seismic spectrum;dividing the first seismic spectrum by a first model ghost spectrum to obtain a deghosted first spectrum;receiving a second seismic trace from a hydrophone in the dual sensor receiver;transforming the second seismic trace into a second seismic spectrum;dividing the second seismic spectrum by a second model ghost spectrum to obtain a deghosted second spectrum;adding the first and second seismic spectra to obtain a deghosted third spectrum;computing an inverse power for each of the first, second and third deghosted spectra;dividing the inverse powers for each of the first, second and third deghosted spectra by a sum of the first, second and third deghosted spectra to obtain first, second, and third diversity filters;applying the first and third diversity filters to the first seismic spectrum to obtain a scaled first seismic spectrum;applying the second and third diversity filters to the second seismic spectrum to obtain a scaled second seismic spectrum; andadding the first and second seismic spectra to obtain a diversity scaled seismic spectrum.