Radon transform and multiple attenuation

Zhihong (Nancy) Cao, John C. Bancroft, R. James Brown, and Chunyan (Mary) Xaio

ABSTRACT

Removing reverberations or multiples from reflection seismograms has been a longstanding problem of exploration geophysics. Multiple reflections often destructively interfere with the primary making interpretation difficult. The Radon transform, which integrates some physical property along a particular path, will be evaluated for attenuating multiple.

Multiples are periodic in the τ-p domain, and predictive deconvolution can be applied in the τ-p domain to suppress multiples. After NMO correction, moveout errors are approximately parabolic and tend to map to points in the parabolic Radon domain. The hyperbolic Radon transform will also map data before and after moveout correction into points, and multiples can be recognized in the Radon domain. The identified multiple energy can then subtracted from the data to improve the interpretation process.

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