Patent ID: 6691039
Filing Date: 2004-02-10
Classification: G01V

Abstract:
A method of processing seismic data to remove unwanted noise from meaningful reflection signals indicative of subsurface formations, comprising the steps of:(c) obtaining field records of seismic data detected at a number of seismic receivers in an area of interest, said seismic data comprising signal amplitude data recorded over time and containing both primary reflection signals and unwanted noise events; (d) assembling said seismic data into common geometry gathers in an offset-time domain; (e) applying an offset weighting factor xn to said amplitude data, wherein 0(f) transforming said offset weighted amplitude data from the offset-time domain to the time-slowness domain using a Radon transformation; (g) applying a corrective filter to the offset weighted, transformed data to enhance the primary reflection signal content of said data and to eliminate unwanted noise events; (h) inverse transforming said enhanced signal content from the time-slowness domain back to the offset-time domain using an inverse Radon transformation; and (i) applying an inverse of the offset weighting factor pn to said inverse transformed data, wherein 0