Patent ID: 7366054

Claim:
A method of processing seismic data to remove unwanted noise from meaningful reflection signals indicative of subsurface formations, comprising the steps of: (a) 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; (b) assembling said seismic data into common geometry gathers in an offset-time domain, said assembled amplitude data being uncorrected for normal moveout; (c) transforming said amplitude data from the offset-time domain to the time-slowness domain using a Radon transformation; (d) applying a corrective filter to enhance the primary reflection signal content of said transformed data and to eliminate unwanted noise events, said corrective filter having a pass region with a lower pass limit and a higher pass limit, wherein said higher pass limit is set within 15% above the slowness of the primary reflection signals; and (e) inverse transforming said filtered data from the time-slowness domain back to the offset-time domain using an inverse Radon transformation, thereby restoring the signal amplitude data for said filtered data.