3D Acoustic Frequency-domain Full Waveform Tomography (FWT) - An Application on SEG/EAGE Overthrust Velocity Model - Université Pierre et Marie Curie Accéder directement au contenu
Communication Dans Un Congrès Année : 2008

3D Acoustic Frequency-domain Full Waveform Tomography (FWT) - An Application on SEG/EAGE Overthrust Velocity Model

H. Ben Hadj Ali
  • Fonction : Auteur
S. Operto
J. Virieux
  • Fonction : Auteur
F. Sourbier
  • Fonction : Auteur

Résumé

Three-dimensional quantitative seismic imaging in complex environments such those involving deepwater, thrust belts, sub-salt and sub-basalt structures is one of the main challenges of seismic exploration such that hydrocarbon exploitation. We present a 3D frequency-domain full waveform tomography (FWT) algorithm suited for wide-aperture seismic data. We aim to develop high-resolution P-wave velocity models at low frequencies. The inverse problem based on a classic gradient method consists of the successive inversion of few increasing frequencies. This defines a multiresolution imaging scheme and allows us to manage compact data volume. The code is fully parallelized and avoids disk swapping by keeping in core the foward-problem solutions in distributed format. We present two validations of our algorithm with the SEG/EAGE Overthrust model. The main structures were well imaged with a spatial resolution in accordance with the inverted frequencies. Further work is required to [i] perform more representative applications on larger computational platforms, [ii] assess the sensitivity of 3D FWT to the starting model and to the acquisition geometry and [iii] Investigate less demanding strategies to perform the forward problem in the frequency domain such that hybrid direct/iterative solver based on domain decomposition method. ...
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Dates et versions

hal-00408374 , version 1 (30-07-2009)

Identifiants

  • HAL Id : hal-00408374 , version 1

Citer

H. Ben Hadj Ali, S. Operto, J. Virieux, F. Sourbier. 3D Acoustic Frequency-domain Full Waveform Tomography (FWT) - An Application on SEG/EAGE Overthrust Velocity Model. 70th EAGE Conference & Exhibition, Jun 2008, Rome, Italy. pp.Full Wave Form Inversion. ⟨hal-00408374⟩
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