B
R
Last name: BROSSIER
First name: R.
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Elastic frequency-domain full-waveform inversion is here applied to a realistic synthetic offshore model to study the behavior of the least-squares and least-absolute-value norms, in the presence of noisy multi-component seis- mic data. As expected, the inversion results show that the L2 norm is highly sensitive to non-Gaussian errors in the...
A new numerical technique for solving the 2D elastodynamic equations in the frequency domain based on a finite-volume P0 approach is proposed for application to full waveform inversion. The associated discretisation is through triangles and the free surface is described along the edges of the triangles which may have different slopes. By...
A new numerical technique for solving the 2D elastodynamic equations based on a finite volume approach is proposed. The associated discretization is through triangles. Only fluxes of required quantities are shared between cells, relaxing meshing conditions compared to finite element methods. The free surface is described along the edges of the...
International audience
Full-waveform inversion is re-emerging as a powerful data-fitting procedure for quantitative seismic imaging of the subsurface from wide-azimuth seismic data. This method is suitable to build high-resolution velocity models provided that the targeted area is sampled by both diving waves and reflected waves. However, the conventional formulation...
A finite volume method, known as the Discontinuous Galerkin method using P0 interpolation scheme, is formulated for the 2D P-SV elastodynamic equations in the frequency domain. This modelling tool is dedicated to full waveform inversion and should allow efficient computation of particle velocities for many excitations required by the inversion...
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We present the finite-volume (FV or P0 Galerkin Discontinuous) formulation applied to the 3D visco-elastic wave equation in the frequency domain. This work is motivated within the framework of global offset seismic imaging by full waveform inversion. Concerning the direct problem, the FV formulation leads to the resolution of a large and sparse...
International audience
Livre en ligne: http://www.intechopen.com/books/show/title/acoustic-waves
Full waveform inversion (FWI) aims to reconstruct high-resolution subsurface models from the full wavefield, which includes diving waves, post-critical reflections and short-spread reflections. Most successful applications of FWI are driven by the information carried by diving waves and post-critical reflections to build the...
Multiparameter full waveform inversion (FWI) is a challenging quantitative seismic imaging method for lithological characterization and reservoir monitoring. The difficulties in multiparameter FWI arise from the variable influence of the different parameter classes on the phase and amplitude of the data, and the trade-off between these. In this...
Multiparameter elastic full waveform inversion (FWI) is a promising technology that allows inferences to be made on rock and fluid properties, which thus narrows the gap between seismic imaging and reservoir characterization. Here, we assess the feasibility of 2-D vertical transverse isotropic visco-elastic FWI of wide-aperture multicomponent...
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The development of dense networks of broad-band seismographs makes teleseismic data amenable to full-waveform inversion (FWI) methods for high-resolution lithospheric imaging. Compared to scattered-field migration, FWI seeks to involve the full seismic wavefield in the inversion. We present a parametric analysis of 2-D frequency-domain FWI in...
International audience
International audience
International audience