3D Full waveform inversion on a Gulf of Mexico WAZ data set

Vigh, Denes; Starr, Bill; Kapoor, Jerry; Li, Hongyan

doi:10.1190/1.3513935

Cited by 62 publications

(14 citation statements)

References 4 publications

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“…At further expanse, the application of gradient-based methods allows for updating model m est in several linear iterations (e.g., Pratt, Shin and Hicks 1998). Therefore, the building of model m est is fully integrable with full-waveform inversion technology (e.g., Tarantola 1984;Pratt 1999;Plessix 2006;Virieux and Operto 2009;Zhu et al 2009), which has shown to produce high-resolution models in recent case studies (e.g., Sirgue et al 2010;Vigh et al 2010;Guitton, Ayeni and Díaz 2012). Alternatively, tools in velocity model building based on the input of a human interpreter can be used for creating a model with sharp interfaces.…”

Section: Wavefield Extrapolationmentioning

confidence: 99%

Increasing illumination and sensitivity of reverse‐time migration with internal multiples

Fleury

2013

Geophysical Prospecting

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A B S T R A C TReverse-time migration is a two-way time-domain finite-frequency technique that accurately handles the propagation of complex scattered waves and produces a bandlimited representation of the subsurface structure that is conventionally assumed to be linear in the contrasts in model parameters. Because of this underlying linear singlescattering assumption, most implementations of this method do not satisfy the energy conservation principle and do not optimally use illumination and model sensitivity of multiply scattered waves. Migrating multiply scattered waves requires preserving the non-linear relation between the image and perturbation of model parameters. I modify the extrapolation of source and receiver wavefields to more accurately handle multiply scattered waves. I extend the concept of the imaging condition in order to map into the subsurface structurally coherent seismic events that correspond to the interaction of both singly and multiply scattered waves. This results in an imaging process referred to here as non-linear reverse-time migration. It includes a strategy that analyses separated contributions of singly and multiply scattered waves to a final non-linear image. The goal is to provide a tool suitable for seismic interpretation and potentially migration velocity analysis that benefits from increased illumination and sensitivity from multiply scattered seismic waves. It is noteworthy that this method can migrate internal multiples, a clear advantage for imaging challenging complex subsurface features, e.g., in salt and basalt environments. The results of synthetic seismic imaging experiments, including a subsalt imaging example, illustrate the technique.

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Section: Wavefield Extrapolationmentioning

confidence: 99%

Increasing illumination and sensitivity of reverse‐time migration with internal multiples

Fleury

2013

Geophysical Prospecting

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“…Over the last decades, FWI has received growing expectations by industry and academy (e.g., Pratt, 1990;Virieux and Operto, 2009;Vigh, 2010;Morgan et al, 2013). FWI is a very promising method, nevertheless, it is limited by its local nature, in the sense that it terminates in the nearest minimum.…”

Section: Introductionmentioning

confidence: 99%

Estimation of velocity macro-models using stochastic full-waveform inversion

Sajeva

Aleardi

Mazzotti

et al. 2014

SEG Technical Program Expanded Abstracts 2014

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“…After its introduction in the 1980s (Lailly 1983; Tarantola 1984; Gauthier et al 1986; Mora 1988; Tarantola 2005), several studies have been published in seismology and exploration geophysics showing the relevance and the difficulties of FWI (Sun & McMechan 1992; Pratt et al 1996; Pratt 1999; Shipp & Singh 2002; Dessa et al 2004; Ravaut et al 2004; Brenders & Pratt 2007). With the increase of computer power, real‐sized 3‐D applications have also been reported (Epanomeritakis et al 2008; Fichtner et al 2009; Plessix 2009; Plessix & Perkins 2010; Sirgue et al 2010; Vigh et al 2010).…”

Section: Introductionmentioning

confidence: 99%

A parametrization study for surface seismic full waveform inversion in an acoustic vertical transversely isotropic medium

Plessix¹,

Cao

2011

Geophysical Journal International

171

108

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S U M M A R YFull waveform inversion (FWI) of surface seismic data requires low-frequency and long-offset data, namely diving waves or post-critical reflections, to update the long wavelength features of the parameters. In most geological settings, short and long offsets cannot be interpreted simultaneously without accounting for anisotropy. FWI therefore may require anisotropic modelling, which leads to the question of the parametrization of the inversion, since it is not possible to retrieve all the earth models from pressure (or vertical displacement) data, even in the simple vertical transversely isotropic (VTI) case. With a change of variables in the acoustic VTI wave equations, it can be shown that, in the context of macromodel building, namely background estimation, acoustic VTI FWI mainly depends on the normal moveout (NMO) velocity and the horizontal velocity (or equivalently a combination of these two velocities). An analysis of the eigenvalue/eigenvector decomposition of the Hessian confirms the relevance of the parametrization of the VTI wave equations with the NMO and horizontal velocities. It also points out a possible ambiguity when one inverts for two parameters. This ambiguity is further illustrated in synthetic examples. The trade-off between velocity heterogeneities and anisotropy also complicates the recovery of the second anisotropic parameter η. Nevertheless, FWI successfully interprets the kinematics of the data.

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3D Full waveform inversion on a Gulf of Mexico WAZ data set

Cited by 62 publications

References 4 publications

Increasing illumination and sensitivity of reverse‐time migration with internal multiples

Increasing illumination and sensitivity of reverse‐time migration with internal multiples

Estimation of velocity macro-models using stochastic full-waveform inversion

A parametrization study for surface seismic full waveform inversion in an acoustic vertical transversely isotropic medium

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