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Keywords: artifact
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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-2021-3583872
... to mitigate the introduction of any edge artifacts, low or high-frequency artifacts, amplitudes shifts, and spurious kinks in the data. artificial intelligence applied geoscience geophysics machine learning deep learning prediction international conference noise neural network bottleneck...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583638
... to invert the contaminated field data. The inversion results show that we are able to remove the casing artifacts from the recovered model and adequately characterize the surrounding geology. upstream oil & gas main line exploration geophysicist 10 reservoir characterization infrastructure...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3567601
... One important requirement for least-squares imaging (LSM) is having an accurate migration velocity model. LSM with large velocity errors results in erroneous reflector locations, strong swing artifact and even non-convergence. To mitigate these issues, we develop a novel least-squares imaging...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583452
... containing both primaries and internal multiples is analyzed and modified. Then, the corresponding solutions to the image artifacts introduced in the process of imaging are proposed, and the high-precision imaging for the seismic data containing both primaries and internal multiples is realized. Finally...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583448
... traces in the input data. Interpolation errors result in artifacts in inverted primaries. We use local primary and multiple orthogonalization as a shaping regularization operator to reduce the artifacts associated with missing near offsets. We apply the workflow to a synthetic demonstrating its...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3593897
...). If the sampling is too coarse, aliasing artifacts appear in the correlation or deconvolution results. Using a sparse inversion approach, based on the solution of a basis-pursuit denoise problem, we can interpolate and deconvolve simultaneously on the desired grid the receiver gathers. The linear Radon transform...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594116
... with GmRTM, the of two grouping strategies (adjacent and scattered) with vari- hybrid strategy can substantially suppress the artifacts caused ous group numbers. In addition to the spatial resolution, ro- by random noise with no increased computational costs, by in- bustness to random noise is another...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594362
... implementation fwi artificial intelligence applied geoscience azmanager exploration geophysicist 10 artifact github operator Chevron Optimization Framework for Imaging and Inversion (COFII) an open source and cloud friendly Julia language framework for seismic modeling and inversion. John Washbourne...
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-2021-3595023
... is , and C is a tomographic deconvolution operator because it deconvolves the blurring artifacts in traveltime slowness tomograms. This the preconditioning operator that is sometimes chosen to be procedure is similar to that of migration deconvolution which a diagonal matrix where Cii = [LT L]i i 1...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426967
... reservoir characterization image-domain least-square reverse-time migration exploration geophysicist 10 regularization artificial intelligence migration seg international exposition artifact synthetic data psf velocity model hessian reflectivity model upstream oil & gas lsm...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3418400
... approximation acoustic approximation p-wave vertical s-wave velocity s-wave velocity reservoir characterization new acoustic approximation exploration geophysicist 10 artifact media accuracy model parameter alkhalifah vti model equation upstream oil & gas s-wave artifact seg...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427986
... in terms of compressing artifacts and increasing signal-noise ratio compared to the conventional equal-weighted stacking. Presentation Date: Wednesday, October 14, 2020 Session Start Time: 1:50 PM Presentation Time: 3:55 PM Location: Poster Station 13 Presentation Type: Poster upstream oil...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427494
... to obtain due to the errors of acquisition, processing, and the migration velocity model. We propose a kernel prediction neural network (KPN) to flatten the events, correct the depth of the improperly migrated events, and remove the noise and unfocused artifacts in CIGs, and further yield an optimally...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425159
... artificial intelligence seismic data fault stick reservoir characterization upstream oil & gas extraction neural network fault probability discontinuity geophysics workflow algorithm constructing fault surface exploration geophysicist 10 artifact machine learning fracture...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427177
.... During the iterative classification procedure, we use only one trained SVM model to define classifying functions to automatically remove different imaging artifacts. Numerical experiments show that the SVM preconditioned LSRTM can effectively suppress sparse acquisition footprints and is robust to some...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427796
... impedance sensitivity kernel has the advantages of attenuating backscattering artifacts and being free of polarity reversal issues. Presentation Date: Monday, October 12, 2020 Session Start Time: 1:50 PM Presentation Time: 2:15 PM Location: Poster Station 7 Presentation Type: Poster upstream oil...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426726
... diving waves. LSRTM estimates perturbations of the background model under a linear assumption (the Born approximation), therefore only single scattering generated in the subsurface is addressed and internal multiples are considered as noise, which results in image artifacts (crosstalk). In this paper we...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425829
... to the algorithm for better amplitude fidelity and spectral content, as well as reducing the artifacts. We illustrate the workflow with examples from both a synthetic model and field data acquired in the North Sea. The results demonstrate the effectiveness of incorporating these two factors into the workflow...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3421387
... of sourcereceiver position errors and seawater changes on the 4D seismic data, and test 4D FWI against these effects. We find that ignoring these NR effects in the inversion can cause strong artifacts in velocity models, and thus should be addressed before or during inversion. By averaging forward and reverse...

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