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Last name: AGHAMIRY
First name: H.
International audience
Full waveform inversion (FWI) is a waveform matching procedure which can potentially provide subsurface models with a wavelength-scale resolution. However, sophisticated regularization techniques are required to decrease the sensitivity of FWI to the initial model and noise and reduce the ill-posedness of the problem resulting from uneven...
International audience
International audience
International audience
International audience
Full waveform inversion (FWI) has recently received lots of attention for microseismic event characterization. However, FWI with unknown sources becomes severely underdetermined, hence requiring strong prior information. The frequency-domain wavefield inversion method (WRI) has shown promising results to mitigate the FWI nonlinearity generated...
Classical full waveform inversion (FWI) is an unconstrained data fitting/parameter estimation problem where the exact solution of the wave equation is enforced in the objective function, leading to highly non-linear problem prone to cycle skipping. To extend the linear regime of FWI, the wavefield reconstruction inversion (WRI) computes...
Full waveform inversion (FWI) is a nonlinear waveform matching procedure which can provide high-resolution subsurface models. However, viscous effects must be taken into account in attenuating media to exploit the full potential of FWI. In the frequency domain, attenuation is implemented in the time-harmonic wave equation with complex-valued...
Frequency-domain full-waveform inversion (FWI) is potentially amenable to efficient processing of full-azimuth long-offset stationary-recording seabed acquisition carried out with a sparse layout of ocean-bottom nodes (OBNs) and broadband sources because the inversion can be performed with a few discrete frequencies. However, computing the...
Frequency-domain full-waveform inversion (FWI) is potentially amenable to efficient processing of full-azimuth long-offset stationary-recording seabed acquisition carried out with a sparse layout of ocean-bottom nodes (OBNs) and broadband sources because the inversion can be performed with a few discrete frequencies. However, computing the...