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Keywords: initial model
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Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4079273
... problem. Moreover, the sparsity of OBN deployments mitigates the fold and can induce aliasing artifacts in the shallow part of the model. In this context, deriving a sufficientlyaccurate initial model that prevents cycle skipping is difficult. We circumvent this challenge with time-domain extendedsource...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4087480
... preconditioning scheme to provide a better sampled initial model for DL interpolation. The DL model works iteratively, passing the data between the unsupervised learning architecture for feature extraction and the iterative framework for reconstruction. An attention network highlights the important information...
Proceedings Papers
H. 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
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100573
... simulated annealing (VFSA) algorithm. We demonstrated the effectiveness of this inversion technique on a 2D line extracted from F3-Netherlands dataset. geology reservoir characterization initial model exploration geophysicist geologist seismic model impedance artificial intelligence seismic...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4091975
... waveform inversion applied geoscience & energy 10 geological subdiscipline inverted model bb method artificial intelligence economic geology iteration dataset petroleum geology machine learning gradient initial model deep-learning approximated inverse hessian american association...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4093901
...-middle layer: the initial model of the tomographic inversion is established by the combination of up-hole and first breaks, and the segmented offset inversion is performed to match ray depth with the thickness of the LVL. The error caused by the shallow depth of up-hole survey and the mismatch of offset...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4094455
... part around the organ of interest. Due to the nature of the garment, the exact position of the transducers is not accurately known a priori . Moreover, FWI is known to be computationally expensive and requires a reliable initial model to efficiently converge to an accurate model. Herein, we...
Proceedings Papers
Guojian Shan, Jingru Chen, Zhemin Tan, John Chen, Yue Wang, Xiaoting Lou, Jennifer Zhang, William Lester
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4098929
... that extended FWI enhance the velocity of complex overburden and improve the image below the salt. reservoir characterization fwi objective function velocity model geologist waveform inversion exploration geophysicist extended fwi imaging geology full waveform inversion initial model true...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4099838
... interpretation data, and initial models to invert elastic parameters and anisotropy parameters for fracture-type reservoirs. Results from datasets with different signal-to-noise ratios demonstrate that the joint-driven inversion method accurately and efficiently estimates the elastic parameters and anisotropy...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100160
... Full-waveform inversion (FWI) applied to regions with large salt bodies often fails without a good initial model, long offsets, and low frequencies. To address this limitation, a previous study embedded U-Nets within a multi-scale FWI to assist in building salt bodies by flooding and unflooding...
Proceedings Papers
Amr Elsabaa, Denes Vigh, Arpana Sarkar, Khaled Abdelaziz, Khaled Hussian, Samir Ahmed, Haytham Abouhadid, Mohamed Maged
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100347
...). structural geology geologist stratigraphy petroleum geology applied geoscience economic geology applied geoscience & energy 10 multiparameter full-waveform inversion rock type geological subdiscipline fwi model initial model final fwi model exploration geophysicist reflectivity american...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583355
... initial model frazer prestack waveform inversion application inversion Seismic inversion method of prestack waveform of isotropic elastic medium and its application for exploration targets of shale reservoir Zhanqing Yu*, Cheng Wang Exploration and Development Research Institute of Daqing Oilfield...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3577774
... an accurate initial model that predict the synthetic data with half-wavelet accuracy might be problematic due to the sparsity of the ocean-bottom nodes, solutions can be found from full-waveform inversion schemes based on alternative misfit functions. The recently developed graph-space optimal transport...
Proceedings Papers
Feng Lin, Dorothy Ren, Jiawei Mei, Zhiguang Xue, Joakim Blanch, Marcus Cahoj, Jon Jarvis, Alex Kostin
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584248
... upstream oil & gas initial model exploration geophysicist 10 inversion applied geoscience expanded abstract basement fwi update reservoir characterization imaging velocity model fwi sparse node data sparse node survey basement position conventional airgun data algorithm...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594471
...-physic property elastic full-waveform inversion innanen model constraint constraint initial model model parameter exploration geophysicist 10 inversion Elastic full-waveform inversion with rock-physics constraints Qi Hu and Kristopher Innanen, Dept. of Geoscience, CREWES Project, University...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594405
... process with minimum data preprocessing from an inaccurate initial model. We demonstrate the benefits of our scheme using synthetic and field data examples. reservoir characterization ls-rtm simultaneous inversion exploration geophysicist 10 gradient upstream oil & gas initial model...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594692
... machine learning artificial intelligence constraint reservoir characterization neural network volve field applied geoscience initial model expanded abstract black curve log analysis deep learning seismic data convolutional neural network low-frequency constraint exploration...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594800
... artificial intelligence objective function velocity model extension reservoir characterization fwi model initial model exploration geophysicist 10 optimization problem applied geoscience full-waveform inversion fwi upstream oil & gas field data geophysics jaime ramos-martínez...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3581908
...- utilized to stabilize the inversion. As an alternative, we pro- sponses in challenging scenarios, in particular at shallow water pose to simultaneously invert for the source signature and the depths and where the initial model built for FWI does not ac- medium parameters close to the source and receiver...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582747
... seismic imaging projects to establish detailed velocity models. It is a natural More robust FWI algorithm thought to combine time-lapse seismic and FWI. A literature review of 4D FWI shows that choosing the The potential benefits of combining time-lapse seismic and optimal initial model suitable for both...
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