FWI has become a standard in velocity model building, however standalone FWI has not. To address this, FWI is brought into the model building sequence earlier by alternating RWI and AWI to recover the long-wavelength acoustic velocity model that is usually built by ray-based tomography. The corresponding long-wavelength anisotropy model is extracted using semi-global FWI. Least-squares FWI then has an adequate starting point to commence introducing the full range of length scales into the final model. The outcome is a high-resolution velocity model bypassing tomography, which penetrates over a kilometre deeper than the turning point of the deepest diving waves.


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  1. Debens, H.A., Warner, M., Umpleby, A. and da Silva, N.V.
    [2015] Global anisotropic 3D FWI. SEG 2015 International Exposition and 85th Annual Meeting, Expanded Abstracts, 1193–1197.
    [Google Scholar]
  2. Dickinson, D., Mancini, F., Li, X., Zhao, K. and Ji, S.
    [2017] A refraction/reflection full-waveform inversion case study from North West Shelf offshore Australia. SEG 2017 International Exposition and 87th Annual Meeting, Expanded Abstracts, 1368–1372.
    [Google Scholar]
  3. Lambaré, G., Guillaume, P. and Montel, J.P.
    [2014] Recent advances in ray-based tomography. 76th EAGE Conference & Exhibition, Extended Abstracts, We G103 01.
    [Google Scholar]
  4. Tilbury, L.A., Clayton, C.J., Conroy, T.J., Philip, G., Boyd, G.A., Johnson, G.A., Rayfield, M.A., Hartanto, L. and Lance, D.P.
    [2009] Pluto – a major gas field hidden beneath the continental slope. The APPEA Journal, 49(1), 243–268.
    [Google Scholar]
  5. Thomsen, L.
    [1986] Weak elastic anisotropy. Geophysics, 51(10), 1954–1966.
    [Google Scholar]
  6. Warner, M. and Guasch, L.
    [2016] Adaptive waveform inversion: Theory. Geophysics, 81(6), R429–R445.
    [Google Scholar]

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