Construction of a velocity model of the brazilian pre salt based on B ´uzios Field - Preliminary results

Karsou, Ammir; Andrade, Lucas de; Rodrigues, Diego M.; Silva, Ruann da; Gadioli, Lara; Costa, Felipe da; Santos, Marco Antônio Cetale; Lupinacci, Wagner Moreira; Filho, Djalma Manoel Soares

doi:10.22564/16cisbgf2019.095

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B úZios Velocity Model1

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2021

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“…This velocity field is based on the real velocity field from the B úzios field, using well data information, sonic well information and seismic horizons (Karsou et al (2019)). To make it even more close to the B úzios field velocity model some elements have been added as a stratified salt and an overhang.…”

Section: B úZios Velocity Modelmentioning

confidence: 99%

Acoustic Least-Squares RTM using Devito

Cristo¹,

Santos²,

Pestana³

2021

Proceeding of the 17th International Congress of the Brazilian Geophysical

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A good resolution of the subsurface image helps to reduce uncertainties, which will guide a good interpretation of the reservoir rocks, spotting possibly an oil & gas accumulation. In this context Least-Squares Reverse Time Migration ( LSRTM ) plays an important role in attenuating migration artifacts, helping to focus the reflectors and improve spatial resolution. In this work it has been used the LSRTM acoustic case using a state-of-art finite-difference (FD) code-generation, Devito, which allows to solve the wave equation, using symbolic expressions. The LSRTM using Devito has been performed in two 2D models, which show its particularities and difficulties. In one of the examples, a synthetic velocity model from the B úzios field was used to validate the LSRTM. Also, some piece of codes has been provided to show the way Devito handles with the wave equation and how easily it is coded.

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Section: B úZios Velocity Modelmentioning

confidence: 99%