Imaging the complex geology in the Central Basin Platform with land FWI

Bai, Dongren; Zheng, Lin; Deng, Wubing

doi:10.1190/segam2021-3583769.1

Cited by 3 publications

References 10 publications

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Elastic vertically transversely isotropic full-waveform inversion: From synthetic to field data

Liu

2023

GEOPHYSICS

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Representing the earth as an elastic medium leads to a more accurate approximation of the seismic response than can be obtained by assuming an acoustic medium. However, this representation requires a larger number of unknown parameters to be introduced and a more complex seismogram to be considered. Consequently, it is important to carefully deal with two challenging issues, the impact of strong surface waves and the crosstalk among parameters, for land seismic multiparameter full-waveform inversion (FWI). Under the elastic vertically transversely isotropic assumption, a robust FWI approach is developed by combining the optimal transport (OT) misfit function, the Gaussian time window, and the suitable parameterization ( v n, η, δ, v s, ρ). Without specific preprocessing, surface waves usually dominate the inversion process, leaving the body waves not fully exploited. Correspondingly, the subsurface model is only updated at a shallow depth. The OT misfit function can balance the contributions of the surface and body waves to model updates in an automatic manner. In addition, the Gaussian time window further improves the weights of the body waves during the inversion. We efficiently exploit the entire seismogram with these two approaches. In this configuration, the performances of several parameterizations chosen from a radiation pattern analysis are evaluated. The proposed inversion strategy is applied to the Middle East model and a field data application. In both cases, it outperforms other inversion strategies. The entire land seismic data are efficiently exploited and the multiparameters are simultaneously reconstructed.

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Elastic vertically transversely isotropic full-waveform inversion: From synthetic to field data

Liu

2023

GEOPHYSICS

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FWI imaging of complex subsalt Mesozoic targets from land to shallow waters

Dy,

Wang,

Mothi

et al. 2023

Third International Meeting for Applied Geoscience &Amp; Energy Expanded Abstracts

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The value of very low frequencies and far offsets for seismic data in the Permian Basin: Case study on a new dense survey from the Central Basin Platform

Durussel¹,

Bai²,

Ahmadi³

et al. 2022

The Leading Edge

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The depth of penetration and multidimensional characteristics of seismic waves make them an essential tool for subsurface exploration. However, their band-limited nature can make it difficult to integrate them with other types of ground measurements. Consequently, far offsets and very low-frequency components are key factors in maximizing the information jointly inverted from all recorded data. This explains why extending seismic bandwidth and available offsets has become a major industry focus. Although this requirement generally increases the complexity of acquisition and has an impact on its cost, improvements have been clearly and widely demonstrated on marine data. Onshore seismic data have generally followed the same trend but face different challenges, making it more difficult to maximize the benefits, especially for full-waveform inversion (FWI). This paper describes a new dense survey acquired in 2020 in the Permian Basin and aims to objectively assess the quality and benefits brought by a richer low end of the spectrum and far offsets. For this purpose, we considered several aspects, from acquisition design and field data to FWI imaging and quantitative interpretation.

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Imaging the complex geology in the Central Basin Platform with land FWI

Cited by 3 publications

References 10 publications

Elastic vertically transversely isotropic full-waveform inversion: From synthetic to field data

Elastic vertically transversely isotropic full-waveform inversion: From synthetic to field data

FWI imaging of complex subsalt Mesozoic targets from land to shallow waters

The value of very low frequencies and far offsets for seismic data in the Permian Basin: Case study on a new dense survey from the Central Basin Platform

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