Patent ID: 6539308
Filing Date: 2003-03-25
Classification: G01V

Abstract:
A method for processing data from dual sensor receivers to produce a combined seismic trace, the method comprising:(a) receiving a first seismic trace from a geophone in a dual sensor receiver; (b) transforming the first seismic trace into a first seismic spectrum; (c) deghosting the first seismic spectrum to obtain a deghosted first spectrum; (d) receiving a second seismic trace from a hydrophone in the dual sensor receiver; (e) transforming the second seismic trace into a second seismic spectrum; (f) deghosting the second seismic spectrum to obtain a deghosted second spectrum; (g) adding the first and second seismic spectra to obtain a deghosted third spectrum; (h) computing an inverse power for each of the first, second and third deghosted spectra; (i) dividing the inverse powers for each to 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; (j) applying the first and third diversity filters to the first seismic spectrum to obtain a scaled first seismic spectrum; (k) applying the second and third diversity filters to the second seismic spectrum to obtain a scaled second seismic spectrum; (l) adding the first scaled and second scaled seismic spectra to obtain a diversity scaled seismic spectrum; and (m) inverse transforming the diversity scaled seismic spectrum to obtain the combined seismic trace.