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Keywords: point source
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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-2024-4094671
... exploration geophysicist similarity-based velocity geology high-speed train point source american association wave multichannel analysis Extracting surface wave dispersion spectra directly from the high-speed train induced vibration Shengpei Xia* (1), Xinyue Pan (1), Xiaokai Wang (1), Wenchao Chen (1...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3422838
... acquisition exploration geophysicist 10 lwd tool logging while drilling dipole point source richard coates transmitter dispersion dispersion curve slowness seg international exposition fundamental mode Hexapole and Octupole Modes in LWD and Their Use in DTS Estimation Ruijia Wang*, Richard...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3421468
... Green’s functions are wavefield solutions for a particular point source. They form basis functions to build wavefields for modeling and inversion. However, calculating Green’s functions are both costly and memory intensive. We formulate frequency-domain machine-learned Green’s functions...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427674
... Presentation Time: 8:55 AM Location: 361F Presentation Type: Oral upstream oil & gas iteration target area macro source elastic fwi point source focal point seg international exposition true model intensity marmousi model computation application inversion focused seismic data...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998297
... the electrostatic response of a discrete set of vertical fractures in the near surface and compare these results to those from anisotropic continuum models. We also examine the power law behavior of these results and compare to continuum theory. We find that in measurement profiles from a single point source...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17728116
... ABSTRACT In this work we propose a hybridizable discontinuous Galerkin (hdG) discretization of the high-frequency Helmholtz equation in the presence of point sources and highly heterogeneous and discontinuous wave speed models. We show that it delivers solutions that are provably second-order...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17774264
... resolution, it has been deemed necessary to reduce the spatial extent of not just the receivers (from large summed arrays down to single sensor recordings) but also the source. Ideally the source should mimic a singular point source, but as this is practically unachievable, this relatively small source...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17687815
... convergence, properties of L-BFGS method and can easily overcome the nondifferentiability of -norm at null positions. The algorithm is demonstrated on synthetic data. Presentation Date: Thursday, September 28, 2017 Start Time: 10:10 AM Location: 362D Presentation Type: ORAL wavelet point source...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17633541
... calculation of beam fans for point sources, as well as accumulated beam indices, with which the total angle of phase rotation of the waves is related. The proposed asymptotic method can be used as a basis for the implementation of multiarrival prestack 3D depth migration. Presentation Date: Thursday...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17633779
... and CUDA technology. Presentation Date: Thursday, September 28, 2017 Start Time: 10:10 AM Location: 360D Presentation Type: ORAL interpolation coefficient reservoir characterization point source formula 4 wavefield continuation equation scalar wave equation depth extrapolation...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13957600
...Incorporating a 3D point source in the ISS FSME for a 1D subsurface and its influence on the subse- quent processing Xinglu Lin and Arthur B. Weglein, M-OSRP/Physics Dept./University of Houston SUMMARY Based on the current 3D inverse-scattering-series (ISS) free- surface-multiple-elimination (FSME...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13955971
... ABSTRACT The Green’s theorem deghosting method (Weglein et al., 2002; Zhang and Weglein, 2005) provides useful/effective deghosted results if the nature of the 3D source is incorporated into the algorithm. For a 3D point source and a 1D subsurface, the method requires a single shot record...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13972264
... generation and propagation of elastic waves. Then we record these waves in the far field (several wavelengths away from the source) and invert P-and S-wave amplitudes for seismic moment tensor. Thus we can derive an effective point source which gives the approximation of the amplitudes. These results...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5880539
... reservoir characterization source prediction point source multiple attenuation algorithm iss internal multiple prediction attenuator Summary In this paper, the 3-D inverse scattering series (ISS) internal multiple attenuation algorithm (Araújo et al., 1994; Weglein et al., 1997, 2003...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0635
...- Gilbert focusing for application in elastic media. experiment point source reservoir characterization imaging source imaging equation 4 source displacement field optimal wave artificial intelligence upstream oil & gas source location bazargani displacement field receiver elastic...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0221
... the wave propagation properties of seawater between = and = The top, left and right edges of the model have absorbing boundaries attenuating all waves incident on them. Along the bottom edge we choose to have a rigid boundary (von Neumann boundary condition) with monopole point sources coinciding...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1038
... algorithm, and illustrates the results. Data was acquired with 3-C ultrasonic transducers on a model that was built by joining both Plexiglas and aluminum blocks. The location algorithm uses a grid search technique to find source coordinates. For every possible point source, three attributes (traveltime...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1063
... equation seismic data interferometry wapenaar reservoir characterization point source surface data ocean bottom jörg schleicher direct wavefield modeling tiago seg houston 2013 Interferometric redatuming using direct wavefield modeling Tiago A. Coimbra, Diego F. Barrera , Jo¨rg Schleicher...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0808
... position of the normal of the wavefront and triangle orientation are discussed. traveltime eikonal equation unstructured grid point source terrascience system ltd wavefront midpoint element level computation triangulation local fermat gradient quadratic interpolation reservoir...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1462
... progression point source modeling cross-correlation passive source representation excitation assumption equation 4 seismic interferometry noise source geophysics jeroen tromp excitation pattern spatial noise draganov reservoir characterization noise excitation procedure...
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