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Keywords: operator
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3418412
... We have developed a new iterative method for simultaneous source separation (deblending). The proposed technique adopts the robust sparse Radon transform to define a coherence pass operator, which, used in conjunction with the steepest descent method, guarantees solutions that honor simultaneous...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3418614
..., numerical solutions from CWE are compared with analytical solutions, and nearly perfect matching between these two solutions is obtained. We also extend these CWEs to be applied for heterogeneous media and the results are verified by nonstationary operator Fourier Integral method. Presentation Date...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3407568
... dispersion upstream oil & gas particle geophysics evolutionary algorithm finite difference method update equation qpso algorithm equation optimized fd scheme coefficient seg international exposition operator exploration geophysicist 10 iteration step size Solution of finite difference...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427089
... in the adjoint source, which mutes or degrades the reflection phases as a data-weighting operator. Our improved EI method avoids this issue, is more stable, and increases the resolution in the velocity model. We show tests on the SEAM data, and an Australian marine data example. Presentation Date: Tuesday...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424509
... reveals that the minimization avoids cycle-skipping only if the weight operator is differential, a requirement shared with extended source inversion algorithms applicable at field scale. Presentation Date: Monday, October 12, 2020 Session Start Time: 1:50 PM Presentation Time: 2:15 PM Location: Poster...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424929
... preconditioner upstream oil & gas iteration wavepath tomographic operator zero-offset wavepath dl 0 exploration geophysicist 10 full waveform inversion repositioning sin 2 facet depth-velocity coupling perturbation operator reflectivity sb 0 Accounting for the depth-velocity coupling...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424977
... adequate near-surface corrections making reservoir characterization operations inadequate for several land datasets. We developed a surface-consistent deconvolution approach for transmitted wavefields that is applied to a sequence of dune and sabkhas where uncorrected amplitude anomalies typically remain...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424997
... Type: Oral reservoir characterization upstream oil & gas colombo neural network inversion workflow machine learning deep learning sandoval-curiel artificial intelligence objective function joint inversion procedure operator exploration geophysicist 10 loss function dl inversion...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428421
... inverted model model extension true model biondi inversion upstream oil & gas waveform inversion full waveform inversion spline grid search direction operator Full waveform inversion by model extension using a model-space multi-scale approach Guillaume Barnier and Ettore Biondi, Stanford...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427913
... geophysicist 10 operator reflection coefficient reverse-time migration suppress least-square reverse-time migration multi-source least-square reverse-time migration constraint crosstalk noise imaging accuracy mlsrtm Sparse constrained multi-source least-squares reverse-time migration using Seislet...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428115
... amplitude operator node velocity model seg international exposition obn survey Ultralong Offset OBN: Path to better subsalt image Hao Xing*, Yang He, Yi Huang and Jianshun Sheng, TGS Summary higher image resolution by reducing source signature and ghosting effects. However, it suffers from its slow...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427630
... synthetic OBC data. Presentation Date: Wednesday, October 14, 2020 Session Start Time: 1:50 PM Presentation Time: 3:05 PM Location: 360A Presentation Type: Oral modeling exploration geophysicist 10 operator staggered grid reservoir characterization geophysics seg international exposition...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425808
... numerical solution reservoir characterization tensor shragge exploration geophysicist 10 operator upstream oil & gas wavefield topographic coordinate system seg international exposition coordinate system topography Least-Squares Reverse Time Migration through Anisotropic Tensorial...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427953
... State-of-the-art source de-signature technology uses nearfield hydrophone recordings to achieve a combination of debubble, source de-ghosting and zero-phasing with a single directional operator. This paper outlines average and shot-by-shot source de-signature strategies for apparition-blended...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3423711
... results from the joint migration inversion technology are consequently compromised. In this paper, we propose a new full wavefield modeling engine using physically correct one-way propagation, reflection and transmission operators. We first introduce the framework of our theory, and next apply our new...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3423985
... of the Fourier transform. We demonstrate that the tensor nuclear norm (TNN) of a sampling operator is correlated with the TNN of the corresponding observation, thus producing a useful tool for determining if low rank optimization is appropriate for a given observation. Of the possible six orientations for order...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425467
... count blind nodal systems present challenges for rapid in-field quality control (QC). Rapid in-field QC is required to (1) enable the identification of faulty equipment, even if rare; (2) identify areas with anomalous noise characteristics in order to inform ongoing operations; (3) rapidly assess...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425521
... inversion upstream oil & gas inverse problem iteration computational cost operator exploration geophysicist 10 iterate inversion optimization problem arxiv preprint arxiv convergence seg international exposition fixed-point operator anderson acceleration gradient Anderson Acceleration...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425671
... projection operators. Such denoisers provide strong blending noise attenuation at the early stages of iterative deblending, thereby improving its convergence rates. The above could be illustrated using a numerically blended dataset. Presentation Date: Wednesday, October 14, 2020 Session Start Time: 9:20 AM...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428410
... machine learning well logging seismic data log analysis upstream oil & gas envelope seg international exposition operator property model application geostatistical modeling genetic inversion iteration genetic algorithm complex trace north sea basin prediction exploration geophysicist...

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