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Keywords: inversion
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Proceedings Papers
Introducing stochasticity into CNN-based property estimation from angle-stack seismic
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4076489
... As one of the primary approaches for property estimation in subsurface interpretation and characterization, stochastic seismic inversion provides a measurement of uncertainty but is a complicated process and requires heavy computation. To accelerate the task with deep learning, we propose...
Proceedings Papers
Regional exploration of crustal structures from long-offset OBN data by extended-source FWI
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4079273
... Regional seismic imaging of continental margins from ultra long-offset sparse ocean-bottom node (OBN) data by Fullwaveform inversion (FWI) is challenging because the complexity of the wavefields and the large number of propagated wavelengths significantly amplify the nonlinearity of the inverse...
Proceedings Papers
Seismic imaging in Tarim Basin: Overcoming complex near-surface conditions
Available to PurchaseXianhuai Zhu, Ruirui Zhao, Sam Gray, Wensheng Duan, Duoming Zheng, Ganglin Lei, Gengxin Peng, Rujie Zhang, Kun Xu, Grace Yan, Junru Jiao
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4087690
... tomography and finite-frequency wavepath inversion at great depth. geology tarim basin near-surface condition complex near-surface condition tomography velocity model applied geoscience & energy 10 seismic imaging geologist overcoming complex near-surface condition geological...
Proceedings Papers
JAX acceleration of implicit FWI and field data application
Available to PurchaseH. V. Nguyen, A. Sekar, K. Wang, T. Zhang, T. Nemeth, U. Albertin, M. Eaid, K. Nihei, E. Wang, K. Innanen
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4089099
... Elastic Full Waveform Inversion (EFWI) is increasingly being viewed as a key technology for seismic imaging. Most successful FWIs require a good set of initial models. Obtaining these models can be time-consuming and ad hoc methods are often used. Several ideas have been recently proposed...
Proceedings Papers
Deep learning approach to inverting flexural wave dispersion
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4089186
... Dispersion curve inversion is a key step in obtaining the acoustic velocity of formations around wells and information evaluation. Traditional dispersion inversion methods, based on wellbore sound propagation theory, suffer from low efficiency and multimodality issues. Methods based on deep...
Proceedings Papers
Image processing of jointly acquired 3D DAS-VSP data with an OBN survey in the Middle East
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4089191
... full waveform inversion (JDFWI) for velocity model update, and one way wave equation multiple migration (OWEMM) method were used to generate final imaging. The results provide client with good quality imaging in a relatively large subsurface area. geologist vertical seismic profile migration...
Proceedings Papers
Elastic AWI and RWI in the Santos Basin
Available to PurchaseTenice Nangoo, Nikhil Shah, Adrian Umpleby, John Armitage, Mike Warner, Gustavo Catao Alves, Andre Bulcao, Analena Mileo Camara de Oliveira
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4089206
... Acoustic full-waveform inversion is often able to build highquality velocity models for sub-salt imaging using only acoustic wave propagation. This is achieved by adaptively matching acoustic data to the real-world elastic field data. Here we show both acoustic and elastic adaptive waveform...
Proceedings Papers
Application of fractional Gaussian fractal-based stochastic seismic inversion to F3-Netherland dataset
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100573
... be incorporated in various forms and for the stochastic technique, the statistics followed by the logs can be used. In case of fractal based inversion, we used the fractal characteristics of the well log to produce fractal-based models. The inversion module minimizes a suitable objective function using very fast...
Proceedings Papers
Physics-informed full-waveform inversion using learned wavefield solutions
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100716
... Full waveform inversion (FWI) is crucial for reconstructing high-resolution subsurface models, but it is hindered by its computational intensity, especially for real-time applications. Leveraging learned wavefield solutions using a Fourier neural operator (FNO), we introduce a novel physics...
Proceedings Papers
Towards wave-equation ambient noise tomography of a landslide: The Harmalière case study
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100725
... subsurface, we use dense 3D node active-source and ambient noise seismic data. We outline dedicated interferometry based processing and inversion workflows for the reconstruction of P- and Swave velocity models. The potential and limitations of waveequation tomography for this kind of datasets and targets...
Proceedings Papers
A prior regularized 3D full-waveform inversion using 2D generative diffusion models
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100734
... Full waveform inversion (FWI) has great potential in reconstructing high-resolution subsurface models. However, due to limitations in observation, this inverse problem is highly ill-posed, especially for recovering a 3D velocity model. To solve this problem, regularization is often used, like...
Proceedings Papers
On the stability of stress inversions from earthquake mechanisms and choosing the fault plane
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100870
... Recent work using stress inversions has emphasized the lack of stability of stress inversions from earthquakes with fault planes of limited diversity. We explore this question using data recorded over an enhanced monitoring array and address how we can answer questions on stability. We show...
Proceedings Papers
Full-waveform inversion from a homogeneous starting model: A field dataset study
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100977
... Majority of full waveform inversion (FWI) implementations are based on local optimization methods. However, due to the high nonlinearity of the forward problem, FWI is challenged with the well-known local minima issue. Traditional FWI methods often require observed data to have low frequency...
Proceedings Papers
Guided strategies for improving machine learning models applied to geophysical problems
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4101010
... interpretation alkhalifah petroleum geology machine learning exploration geophysicist seismic data inversion pitfall ravasi Fourth International Meeting for Applied Geoscience & Energy 10.1190/image2024-4101010.1 © 2024 Society of Exploration Geophysicists and the American Association of Petroleum...
Proceedings Papers
About the importance of the horizontal components of the wavefield for a well-constrained velocity inversion: 3-C versus 1-C inversions
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4101079
... different sensitivities in depth Love waves being more sensitive to shallower depths, and Rayleigh waves to greater depths in the same frequency band jointly inverting both Rayleigh and Love waves improves the vertical resolution. Besides, joint inversion also reduces the number of solutions...
Proceedings Papers
FWI uncertainty analysis with Stein variational gradient descent
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4101084
... Full waveform inversion (FWI) is becoming an increasingly dominant force in velocity model building and seismic imaging, often providing us with unrivaled focusing and resolution of the subsurface image. The superior velocity models and seismic images achieved through FWI also enable serious...
Proceedings Papers
Seismic first arrival tomography for top salt velocity update: A case study in the Santos Basin, Brazil
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4101257
... velocities accordingly, considering the model resolution. Strategies for optimizing forward modeling and inversion have been implemented. Results show that first arrival tomography can update top salt velocities with large offset acquisition geometries. tomography arrival tomography salt tectonics...
Proceedings Papers
Uncertainty quantification of single and multi-parameter full-waveform inversion through a variational autoencoder
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4101297
... Uncertainty quantification (UQ) plays a vital role in addressing the challenges and limitations encountered in full-waveform inversion (FWI). Most UQ methods require parameter sampling which requires many forward and adjoint solves. This often results in very high computational overhead compared...
Proceedings Papers
Efficient Bayesian full-waveform inversion using a deep convolutional autoencoder prior
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4101311
... By formulating the full waveform inversion (FWI) in the Bayesian inference framework, uncertainties are implicitly considered as the covariance matrix of the posterior probability distribution (PPD). As a sampling-based method to solve the Bayesian FWI problem, the Markov chain Monte Carlo (MCMC...
Proceedings Papers
Assessing the region of ambiguity of potential fields to improve surveying and modelling
Available to PurchasePublisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4101312
... geologist geological subdiscipline flexure exploration geophysicist reservoir characterization potential field applied geoscience & energy 10 ambiguity altitude inversion gravity data deconvolution interpretation geophysical prospecting information geophysics application Assessing...
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