Dual WAZ and tilted orthorhombic anisotropy model building and imaging has approved to provide a more geologic conforming high resolution velocity models, give a better illumination and flatten the common imaging gathers for all azimuths, and improve the CIG flatness and enhance seismic continuity. In this paper we will present wide azimuthal orthorhombic anisotropy model building workflow and multiazimuth modelling for orthogonal WAZ, compare the TORT initial and final models in depth sections and slices, and show some examples of final TORT seismic imaging and CIG comparison to demonstrate the orthorhombic anisotropy modelling improves the CIG flatness across the different azimuths.


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  1. He, Y., Gersztenkorn, A., Hilburn, G., Yang, S. and Wang, B.
    , 2013, Orthorhombic PSDM processing, a case history in Mississippi Canyon, Gulf of Mexico: 83rd Annual International Meeting, SEG, Expanded Abstracts, 3799–3803.
    [Google Scholar]
  2. Hilburn, G., He, Y., Yan, Z., and Sherrill, F.
    , 2014, High-resolution tomographic inversion with image guided preconditioning and offset-dependent picking: 84th Annual International Meeting, SEG, Expanded Abstracts, 4768–4772.
    [Google Scholar]
  3. Li, Y., Han, W., Chen, C., and Huang, T.
    , 2012, Velocity model building for tilted orthorhombic depth imaging: 82nd Annual International Meeting, SEG, Expanded Abstracts, 1–5.
    [Google Scholar]
  4. Rodriguez, G., Liu, S.
    , 2016, Reducing subsalt velocity uncertainties using common offset RTM gathers (COR): 86th Annual International Meeting, SEG, Expanded Abstracts, 5259–5263.
    [Google Scholar]
  5. Tiwari, D., Hilburn, He, Y., Li, Y., Sherrill, F., Guo, Z.
    , 2015, High resolution tilted-orthorhombic tomographic inversion to improve velocity modeling and imaging: a case study of its impact on subsalt: 85th Annual International Meeting, SEG, Expanded Abstracts, 361–365.
    [Google Scholar]
  6. Tsvankin, I.
    , 1997, anisotropic parameters and P-wave velocity for orthorhombic media: Geophysics, 62, 1292–1309.
    [Google Scholar]

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