Ground Roll Attenuation Using a Time-frequency Dependent Polarization Filter Based on S Transform
Y.Y. Tan, C. He, Y.D. Wang and Z. Zhao
Event name: 75th EAGE Conference & Exhibition incorporating SPE EUROPEC 2013
Session: Multi-component Seismic
Publication date: 10 June 2013
Info: Extended abstract, PDF ( 1.14Mb )
Price: € 20
We develop a new polarization filter to attenuate the ground roll in seismic records. This polarization filter is designed as a joint function of time and frequency based on S transform, so it can overcome some limitations of other polarization filters that operate exclusively in either time or frequency domain. Here, the S transform is preferable because its scalable window length can ensure the same number of cycles of Fourier sinusoid, and this property makes the estimation of local polarization attributes more precisely. To demonstrate the feasibility and effectiveness of our approach, we apply this polarization filter on synthetic and real data examples. The results demonstrate that the proposed polarization filter can effectively attenuate the ground roll and successfully protect the body wave.