Abstract：Because of water-depth rapid changes in rough deep sea bottoms and complex geological structures of mid-deep layers in the north of South China Sea,narrow-azimuth 3D seismic imaging cannot meet requirements of the target evaluation.Therefore two-azimuth 3D seismic data acquisitions are conducted in the Baodao Sag,the Qiongdongnan Basin.First we analyze differences of migration velocity and anisotropic parameters in different azimuths on these data sets.Then we build velocity models of two-azimuth 3D seismic data with tomographic inversion.Finally we achieve prestack depth migration combined imaging with two-azimuth anisotropic velocity model.Seismic data examples in this area show that the proposed approach obtains more continuous and stable events and achieve better im-aging of complex structures,which are helpful for the structural interpretation and the target evaluation.
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DENG Dun, DENG Yong, MA Guangke, SUI Bo, LI Xiaoxiao, OUYANG Min. Two-azimuth deepwater seismic data combined imaging in rugged seabed areas. Oil Geophysical Prospecting, 2019, 54(6): 1293-1301.
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