3D Acoustic Frequency-domain Full Waveform Tomography (FWT) - An Application on SEG/EAGE Overthrust Velocity Model - Archive ouverte HAL Access content directly
Conference Papers Year : 2008

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

(1) , (1) , (1) , (1)
1
H. Ben Hadj Ali
  • Function : Author
S. Operto
J. Virieux
  • Function : Author
F. Sourbier
  • Function : Author

Abstract

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. ...
Not file

Dates and versions

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

Identifiers

  • HAL Id : hal-00408374 , version 1

Cite

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⟩
59 View
0 Download

Share

Gmail Facebook Twitter LinkedIn More