This paper presents the benefits of combining geological velocity modelling with Least-Squares Migration to generate seismic images for the Brazilian presalt reservoirs. The geological velocity modelling focus on the evaporitic salts section characterization, regarding the stratification features presented on this layer, which were incorporated in the velocity model. Results are compared with seismic images created by the velocity model with tomography – without salt stratification – and Reverse Time Migration. In addition, a quantitative comparison is made with a modelled reference horizon to analyse the depth positioning and the migrated amplitude.


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  1. Dias, B. P., Guerra, C., Bulcão, A. & Dias, R. M.
    2018. Exploring Inversion Strategies in Image Domain Least Squares Migration. First EAGE/SBGf Workshop on Least Squares Migration. LMSTU01. Rio de Janeiro, RJ. Brazil. doi: 10.3997/2214‑4609.201803060.
    https://doi.org/10.3997/2214-4609.201803060 [Google Scholar]
  2. FonsecaJ., TeixeiraL., MaulA., BarrosP., BoechatJ. & GonzálezM.
    2018. Modelling Geological Layers into new Velocity Models for Seismic Migration Process: A Brazilian Pre-Salt Case. First EAGE/PESGB Workshop on Velocities. London, UK. doi: 10.3997/2214‑4609.201800010.
    https://doi.org/10.3997/2214-4609.201800010 [Google Scholar]
  3. Hu, J., Schuster, G. T. & Valasek, P. A.
    , 2001. Poststack Migration Deconvolution. Geophysics, 66, 939–952. doi: 10.1190/1.1444984.
    https://doi.org/10.1190/1.1444984 [Google Scholar]
  4. Jones, I. F. & DavisonI.
    2013. Seismic Imaging and Around Salt Bodies: Problems and Pitfalls. 75th EAGE Conference & Exhibition. London, UK. doi: 10.1190/segam20140047.1.
    https://doi.org/10.1190/segam20140047.1 [Google Scholar]
  5. MaulA., FonsecaJ., TeixeiraL., BarrosP., BoechatJ., NunesJ. P., YamamotoT., GonzálezM. & GonzálezG..
    2018a. Modelling Intra-Salt Layers when Building Velocity Models for Depth Migration. Examples of the Santos Basins, Brazilian Offshore. 88th Annual Meeting. Anahein, CA, USA. pp. 3764–3767. doi: 10.1190/segam2018‑2996209.1.
    https://doi.org/10.1190/segam2018-2996209.1 [Google Scholar]
  6. MaulA., SantosM. C. & SilvaC. G.
    2018b. Few Considerations, Warnings and Benefits for the E&P Industry when Incorporating Stratification inside Salt Section. RBGf – Revista Brasileira de Geofísica, V.36, n.4. doi: 10.22564/rbgf.v36i4.1981.
    https://doi.org/10.22564/rbgf.v36i4.1981 [Google Scholar]
  7. Nemeth, T., Wu, C. & Schuster, G. T.
    , 1999. Least-Squares Migration of Incomplete Reflection Data. Geophysics, 64, 208–221. doi: 10.1190/1.1444517.
    https://doi.org/10.1190/1.1444517 [Google Scholar]

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