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Technical Abstract

Multi-modal surface wave inversion and application to North sea OBN data

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Surface wave inversion (SWI) for S-wave velocity plays an important role in near surface characterization and PS-wave velocity model building for depth migration. A hybrid approach is proposed to reduce non-linearity for multi-modal inversion without a-priori identification of higher order modes. This method is applied to north sea OBN data and produce a shallow Vs model that penetrates 120m depth below seabed. Vp/Vs ratios are then calculated as a powerful tool for near-surface characterization. SWI provides a high-resolution shallow Vs model which complements the weakness of PS-wave tomography in illuminating the near surface.
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Publications

EAGE - European Association of Geoscientists and Engineers

Authors

Song Hou, Dong Zheng, Xiao-Gui Miao, Ross Haacke

Month

May

Copyright

© 2016 EAGE