Abstract：Middle and deep targets in Songliao Basin are strongly influenced by peg-leg multiples generated from strong reflection interfaces,which decrease the amplitude fidelity and vertical resolution in the seismic imaging.Based on 3D seismic and logging data analysis,many multiples are characterized by more orders,various periods,and energy variation.Multiples are overlapped each other,and even with primary,which leads it difficult to be suppressed.Therefore we propse a peg-leg multiple suppression with the weight-constrain inversion of Radon transform in the frequency domain.First on CDP gathers after NMO,multiples are separated from primaries with parabola Radon transform in the frequency domain.Then multiples are reconstructed by the weight-constrain inversion,which decreases energy smear in the Radon domain caused by limited offset.Finally multiples are suppressed on seismic data with adaptive subtraction.Our applications show that the proposed algorithm achives better amplitude fidelity and vertical resolution,which is very helpful for reservoir prediction.
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Chen Hongzhu, Wang Yanchun. Peg-leg multiple suppression with the weight-constrain inversion of Radon transform in the frequency domain in Songliao Basin. Oil Geophysical Prospecting, 2018, 53(4): 666-673.
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