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Keywords: gradient
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Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3581927
... with well-measured strike and dip information. By applying the new algorithm to a 3D reflection seismic horizon, we illustrate its capability of tying subsurface maps to both depth and orientation information automatically. subsurface map cubic spline interpolation algorithm gradient upstream oil...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582313
... applied geoscience workflow fwi gradient Time-lapse joint full waveform inversion of diving and re ected waves Wei Zhou, Universite´ Grenoble Alpes; David Lumley, University of Texas at Dallas SUMMARY 2017) rstly builds a baseline FWI model which is then taken as the initial model for monitor FWI...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582991
... petrophysical information full-waveform inversion inversion gas cloud gradient sava upstream oil & gas spatial probabilistic petrophysical constraint viscoelastic full-waveform inversion petrophysical data artificial intelligence penalty term reflector anomaly exploration geophysicist 10 well...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582659
... related to amplitude variation with angle of incidence (AVA). Such multi-parameter inversions face difficulties with parameter scaling, Hessian estimation and slow convergence rates. Therefore, we also propose an efficient adaptive gradient extension to a conventional quasi-Newton optimization scheme...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582266
... geoscience prediction fault detection exploration geophysicist 10 seismic section zhang neural network neural information processing system resnet structure cnn convolutional layer convolutional neural network probability gradient image segmentation convolutional window Fault detection...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583403
... characterization misfit measurement inversion blondel artificial intelligence waveform inversion differentiable dynamic time gradient derivative dtw distance upstream oil & gas geophysics algorithm differentiable dtw distance adjoint source synthetic data Mis t functions based...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583460
... distance, combining the geosteering inversion with the deep learning techniques may cause sensitivity issues and lead the training to fail. This paper proposes a cross-gradient based method for solving the highly sensitive geosteering inversion with a physics-driven deep network. By inspecting...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584072
... with the presented technology the door towards the use of low-memory accelerators such as GPUs. reservoir characterization memory imprint gradient calculation geophysics upstream oil & gas seismic inversion full-waveform inversion inversion machine learning approximation randomized trace...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583961
... migration demigration source reconstruction reservoir characterization extended fwi correlation receiver exploration geophysicist 10 reconstruction inversion hessian artificial intelligence scattered-field equation waveform inversion full-waveform inversion fwi gradient equation...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584643
... drilling measurement lwd annual logging symposium magnetic field exploration geophysicist 10 inversion gradient chen inversion algorithm In certain scenarios of hydrocarbon exploration and production, the dielectric effects can play a significant role. Ignoring these effects may lead...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594393
... geoscience iteration optimization method application inversion gradient data misfit A hybrid optimization method for full waveform inversion Zeyu Zhao*, and Mrinal K. Sen, Institute for Geophysics, University of Texas at Austin SUMMARY be a geologically meaningful solution. Traditional FWI algo...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594405
... is the separation of the low- and high-wavenumber components of the gradient based on inverse scattering theory, enabling the sensitivity kernels to update the velocity and the vector reflectivity, respectively. The estimation problem is essentially a multi-parameter inversion where the crosstalk trade-offs between...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594168
...-viscoelastic wave propagation. Within cant improvement in parameter recovery given a combination such a framework the inversion gradient for the parameters of cross-well and surface data in comparison with surface ac- in complex media with the complex objective functions can quisition. be conveniently...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594666
... to achieve the spectrum whitening function. Accordingly, the virtual source is computed by summing all of the single-frequency misfits. Based on the adjoint method, the gradients corresponding to model parameters are calculated via frequency-domain gradient formulas, where the phase-sensitive detection (PSD...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594587
... and a traveltime adjoint wavefield: In full waveform inversion or wave-equation traveltime tomography, the functional gradient is calculated by the K x;xr , xs T max u t; xs x (1) integration of an incident wavefield and an adjoint M (x) 0 x, x, t; dt wavefield. However, the incident and adjoint...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594908
... gradient upstream oil & gas workload seismic imaging fwi gpus container hyperwavve framework dask cloud-native solution velocity model azure architecture Hyperwavve: a cloud-native solution for hyperscale seismic imaging on Azure Qie Zhang*, George Iordanescu, Wee Hyong Tok, Sverre...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3575102
... for the fluid factor commonly used in AVO analysis and interpretation. The expression is a function of common AVO intercept and gradient and a weighting coefficient that allows one to suppress the contribution of lithology and other factors not related to fluid content. The performance of the weighted fluid...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-W6-05
... magnetometry upstream oil & gas magnetic field application sensor resolution operation stolz magnetometer noise gradiometer magnetic gradiometry ftmg instrument metals & mining instrument exploration geophysicist 10 gradiometry schultze gradient Status and future perspectives...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3581648
... gradient inversion fwi gradient full waveform inversion artifact conventional fwi gradient tomographic component Tomography-mode full waveform inversion with structural shaping regularization Ziying Wang*, Jianping Huang, Zhenchun Li and Ruhua Zhang, China University of Petroleum (East China...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583931
... of the reflective interfaces. Then the predicted results are used to optimize the gradient and improve the imaging profiles. Numerical tests on both self-generated models and Marmousi model show promising imaging results of our proposed method. machine learning upstream oil & gas u-net neural network...

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