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Efficient 3D frequency-domain full-waveform inversion of ocean-bottom cable data with sparse block low-rank direct solver: a real data case study from the North Sea

Amestoy, Patrick and Brossier, Romain and Buttari, Alfredo and L'Excellent, Jean-Yves and Mary, Théo and Métivier, Ludovic and Miniussi, Alain and Operto, Stéphane and Ribodetti, Alessandra and Virieux, Jean and Weisbecker, Clément Efficient 3D frequency-domain full-waveform inversion of ocean-bottom cable data with sparse block low-rank direct solver: a real data case study from the North Sea. (2015) In: Society of Exploration Geophysicists annual meeting (SEG 2015), 18 October 2015 - 23 October 2015 (New Orleans, United States).

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Official URL: http://dx.doi.org/10.1190/segam2015-5713962.1

Abstract

We present an application of 3D frequency-domain full waveform inversion (FWI) on ocean-bottom cable data from the North Sea. Frequency-domain seismic modeling is performed in the visco-acoustic VTI approximation with a sparse direct solver based on the multifrontal method. The computational cost of the multifrontal LU factorization is efficiently reduced with a block-low rank (BLR) approximation of the dense frontal matrices. A multiscale frequency-domain FWI is applied by successive inversions of 11 discrete frequencies in the 3.5Hz-10Hz frequency band. The velocity model built by FWI reveals short-scale features such as channels, scrapes left by drifting icebergs on the paleo-seafloor, fractures and deep reflectors below the reservoir level, although the presence of gas in the overburden. The quality of the FWI results is controlled by time-domain modeling and source wavelet estimation. Next step is the application of multi-parameter FWI with second-order optimization algorithms, which can be efficiently implemented with our frequency-domain modeling engine.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to Society of Exploration Geophysicists (SEG). This papers appears in SEG Technical Program Expanded Abstracts 2015 ISSN: 1949-4645 The original PDF of the article can be found at: http://library.seg.org/doi/10.1190/segam2015-5713962.1
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
French research institutions > Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux - IFSTTAR (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche en Informatique et en Automatique - INRIA (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
Other partners > Université Nice Sophia Antipolis (FRANCE)
Other partners > Observatoire de la Côte d'Azur (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université de Toulouse I-Sciences Sociales - UT1 (FRANCE)
Other partners > Université Joseph Fourier Grenoble 1 - UJF (FRANCE)
Other partners > Université de Savoie (FRANCE)
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Deposited By: IRIT IRIT
Deposited On:19 May 2017 14:48

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