Patent ID: 6735528
Filing Date: 2004-05-11
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) transforming said amplitude data from the offset-time domain to the time-slowness domain using a Radon transformation, wherein said Radon transformation is applied within defined slowness limits pmin and pmax, where pmin is a predetermined minimum slowness and pmax is a predetermined maximum slowness; (f) applying a corrective filter to enhance the primary reflection signal content of said transformed data and to eliminate unwanted noise events; and (g) inverse transforming said enhanced signal content from the time-slowness domain back to the offset-time domain using an inverse Radon transformation, thereby restoring the signal amplitude data for said enhanced signal content.