Wavefield Decomposition-Based Direct Envelope Inversion and Structure-Guided Perturbation Decomposition for Salt Building

Zhang, Pan; Han, Liguo; Zhang, Fengjiao; Feng, Qiang; Chen, Xue

doi:10.3390/min11090919

Cited by 4 publications

(3 citation statements)

References 28 publications

(40 reference statements)

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“…When the seismic data lack low frequencies, it poses a great challenge for the traditional FWI to invert the deep-seated ore bodies [19][20][21][22][23][24][25][26][27]. This is because the reflection wave-based FWI misfit function shows strong nonlinear characteristics and leads to cycle skipping in the FWI process [10,11,28,32,38].…”

Section: Pafwi With Total-variation Regularizationmentioning

confidence: 99%

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Potential of Phase-Amplitude-Based Multi-Scale Full Waveform Inversion with Total-Variation Regularization for Seismic Imaging of Deep-Seated Ores

Xie

et al. 2022

Minerals

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As the demand for ore resources increases, the target for mineral exploration gradually shifts from shallow to deep parts of the Earth (>1 km). However, for the ore−hosting strata, it is difficult to obtain high−resolution images by using the electromagnetic method. Seismic full waveform inversion (FWI) is an optimization algorithm which aims at minimizing the prestack seismic data residual between synthetic and observed data. In this case, FWI provides an effective way to achieve high−resolution imaging of subsurface structures. However, acquired seismic data usually lack low frequencies, resulting in severe cycle skipping of FWI, when the initial velocity model is far away from the true one. Phase information in the seismic data provides the kinematic characteristics of waves and has a quasi−linearly relationship with subsurface structures. In this article, we propose to use a phase−amplitude−based full waveform inversion with total−variation regularization (TV−PAFWI) to invert the deep−seated ores. The ore−hosting velocity model test results demonstrate that the TV−PAFWI is suitable for high−resolution velocity model building, especially for deep−seated ores.

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Section: Pafwi With Total-variation Regularizationmentioning

confidence: 99%

“…Zhang et al used the multisource FWI method to invert the ore bodies [18]. However, low-frequency seismic data below 6 Hz is still extremely important to retrieve low-wave-number structures and avoid cycle skipping of FWI [19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Potential of Phase-Amplitude-Based Multi-Scale Full Waveform Inversion with Total-Variation Regularization for Seismic Imaging of Deep-Seated Ores

Xie

et al. 2022

Minerals

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“…active seismic data in full, waveform inversion could obtain a suitable result for the highresolution seismic imaging of metal ore bodies. Zhang et al [9] proposed a structure-guided perturbation decomposition method, which can separate strong scattering salt information from direct envelope inversion results with the help of reverse time migration images. The numerical tests showed that the method is effective with good antinoise performance.…”

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confidence: 99%

Editorial for the Special Issue: “Studies of Seismic Reservoir Characterization”

Zhang

Ivandic

2022

Minerals

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Salt and subsalt structure recovery — An envelope-based waveform inversion with local angle domain illumination compensation and L-BFGS

Luo

Zhou²,

et al. 2023

GEOPHYSICS

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Correct subsalt structure recovery is important for subsalt reservoirs exploration. However, high precision subsalt structure retrieving using full waveform inversion (FWI) is not easy caused by the shielding from salt body and the depth of the target. In order to get correct subsalt structures, techniques which can effectively work with deep targets are desired. Besides, correct recovery of the salt body is critical for the recovery of subsalt structure. However, the salt body recovery itself is also challenging in FWI, especially when a reasonable starting model is not available. In this work, we consider both the recovery of the salt structure and subsalt structure. A local angle domain illumination compensated direct envelope inversion with local resolution function is proposed to provide large-scale background salt structure with enhanced and more balanced recovery of the salt body in deep part. Then FWI with angle domain illumination compensation is used to improve the recovery for both the salt and subsalt structures. To further enhance the quality of the inversion, model updating with L-BFGS is embed into the whole process. Numerical examples with the SEG/EAGE salt model and the Sigsbee model demonstrated that the proposed method can retrieve the salt structure as well as the subsalt structure effectively with high precision starting from a linear starting model.

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Wavefield Decomposition-Based Direct Envelope Inversion and Structure-Guided Perturbation Decomposition for Salt Building

Cited by 4 publications

References 28 publications

Potential of Phase-Amplitude-Based Multi-Scale Full Waveform Inversion with Total-Variation Regularization for Seismic Imaging of Deep-Seated Ores

Potential of Phase-Amplitude-Based Multi-Scale Full Waveform Inversion with Total-Variation Regularization for Seismic Imaging of Deep-Seated Ores

Editorial for the Special Issue: “Studies of Seismic Reservoir Characterization”

Salt and subsalt structure recovery — An envelope-based waveform inversion with local angle domain illumination compensation and L-BFGS

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