[PDF] Top 20 Seismic imaging˸ strategies for visco-acoustic full waveform inversion

... Figure 1.4: Intrinsic attenuation effects for one seismic trace in time domain left and normalized spectrum in frequency domain right, the solid red line is the acoustic wave, and the so[r] ... Voir le document complet

... the full elastic waveform inversion in the frequency domain in a 2-D ...allows imaging of two physical seismic parameters, using vertical and horizontal field ...the full elastic ... Voir le document complet

... comparisons. Seismic imaging practitioners have used over year and year representations of the seismic data in panels allowing to identify clearly the type of waves and the seismic events ... Voir le document complet

... essential for improving seismic imaging of both shallow and deeper exploration ...tional seismic characterisation is done by analysing body waves. For example, first-arrival traveltime ... Voir le document complet

... illumination, seismic imaging, waveform ...Quantitative imaging using full wave equation has been achieved through the use of the adjoint formulation problem for seismic ... Voir le document complet

... [1] Masson, Yder, Paul Cupillard, Yann Capdeville, and Barbara Romanowicz. On the numerical im- ple- mentation of time-reversal mirrors for tomographic imaging. Geophysical Journal International, 2013. [2] ... Voir le document complet

... Abstract. Full Waveform Inversion (FWI) is a powerful method for reconstructing subsurface parameters from local measurements of the seismic ...methods for the resolution of FWI ... Voir le document complet

... results for an ethanol tracer ...model strategies for time-lapse data were tested to investigate which SM provides the most accurate plume ...that for a scenario with small ε r and σ changes ... Voir le document complet

... ocean-bottom seismic data in the visco-acoustic VTI ...allow for the computationally-efficient processing of a large number of sources and receivers with limited computational resources thanks ... Voir le document complet

... of seismic multichannel reflection data collected along the investigated wide- aperture ...used for the wide-aperture ...four inversion runs and was parametrized dur- ing the last run (which involves ... Voir le document complet

... [ 10 ] A thickened oceanic crustal structure presently colliding the backstop is visible in our images (Figures 3 and 4). Intra-oceanic shortening is made necessary here as a transition between domains of distinct ... Voir le document complet

... Introduction Full Waveform Inversion (FWI) computes quantitative estimates of the subsurface parameters, such as the bulk wave velocity, the shear wave velocity, or the rock ...and seismic ... Voir le document complet

... of Full-waveform Inversion for Imaging Piecewise Media Hossein ...Abstract—Full waveform inversion (FWI) is an iterative nonlin- ear waveform matching ... Voir le document complet

... L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignemen[r] ... Voir le document complet

... context, seismic inversion techniques become partic- ularly interesting since they are able to invert the differences be- tween observed and theoretical frequencies and translate them into appropriate ... Voir le document complet

... 10. Waveform inversion ...frequency-domain waveform tomography, the usual way to recover the features of a model is to reconstruct wavenumbers in an increasing order (Forgues et ...by ... Voir le document complet

... aliasing. For a wide-aperture experiment, the fold may be defined as L/2DO where the OBS spacing and the range of offsets over which a reflection is observed in an OBS gather are denoted by DO and L, ... Voir le document complet

... 1.2.3 Current limitations of FWI FWI is capable of potentially imaging complex structures. However, it presents several limitations [ Virieux and Operto, 2009 ]: ∙ Local minima. The objective function of FWI is ... Voir le document complet

... Development of borehole geophysics has recently focused on reservoir characterization. Within this effort, extensive full waveform acoustic surveys have demonstrated a [r] ... Voir le document complet

... incident Stoneley wave pressure in the borehole transmitted Stoneley wave pressure in the borehole reflected Stone ley wave pressure in the borehole rate of fluid flow in the porous medi[r] ... Voir le document complet