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Keywords: wavefield extrapolation
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426844
... to produce reliable reconstruction results for common-shot gathers, which is necessary for successful multidimensional deconvolution in an OBN scenario. To stabilize the interpolation for common-shot gathers, we propose to exploit the principle of reciprocity in combination with wavefield extrapolation...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997182
... acquired by manipulating the geometry of the optical fiber. Similarly, using the same approach the reconstruction of the displacement vector is possible. The availability of the entire strain tensor opens the possibility for accurate elastic wavefield extrapolation, thus avoiding the generation...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17747338
... ABSTRACT We have developed a novel Q compensation approach for adjoint-based seismic imaging by pseudodifferential scaling. The algorithm is stable, because it doesn’t involve amplitude amplification during wavefield extrapolations. We consider an image has correct amplitudes...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17775790
... Time: 11:25 AM Location: 361F Presentation Type: ORAL full-model inversion inversion upstream oil & gas localized elastic full waveform inversion receiver reservoir characterization wavefield injection waveform inversion virtual receiver perturbation wavefield extrapolation...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13512297
... reservoir characterization wavefield extrapolation polarity image condition Aki , K. , and P. G. Richards , 1980 , Quantitative seismology, theory and methods : W. H. Freeman and Co. Cervený , V. , 2001 , Seismic ray theory : Cambridge University Press , 10.1017...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5882419
...-layer on the source or receiver side. Typically, the water-layer-related multiples have large amplitudes because of the strong contrasts in material properties at the air/water (free surface) and at the water/sediments interfaces. Deconvolution, initially, and later wavefield extrapolation methods were...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0991
... for acoustic wavefield extrapolation in variable velocity media (Fowler et al., 2010). Zhang and Zhang (2009) used the optimized separable approximation (OSA) to work out recursive integral time-extrapolation (RITE) extrapolators. However, it is difficult to apply the OSA to the actual work for its high...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0104
... some of the dip limitations of downward continuation. ray coordinate reverse-time migration downward continuation normal ray coordinate migration alkhalifah wavefront equation cartesian coordinate migration image split-step fourier migration wavefield extrapolation reservoir...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-3140
... SUMMARY Riemannian wavefield extrapolation, a wave-equation imaging method for efficient one-way propagation of 3D wavefields, is extended to 3D seismic surveys. I formulate an inline delayed-shot migration procedure in 3D tilted elliptical-cylindrical (TEC) coordinate systems. When inline...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-4375
... SUMMARY We show 3D real data results of migration velocity analysis by wavefield extrapolation using data synthesized by the prestack exploding-reflector model (PERM). PERM is a generalization of the exploding reflector model (ERM) in a sense that migration of PERM data can generate a pre...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-2834
... method is about 60°, which allow us to handle wide-angle propagations and strong lateral velocity contrast simultaneously by purely using Fourier transform. Only four 2D Fourier transforms are required for each step of 3D wavefield extrapolation. Compared with globally optimized Fourier finite-difference...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-3045
... the prestack data, and the large step size is used for wavefield extrapolation to further reduce the computation cost of the PSDM method. At the same time, a phase-shifted linear interpolation method is used to interpolate the extrapolated wavefield which can significantly improve the accuracy of the migration...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-2407
... Summary In this abstract we introduce a wavefield extrapolation based summation for prestack time migration (PSTM). Similar to Kirchhoff PSTM, this migration algorithm produces an image at any subsurface point by using single rms velocity value. The phase-shift plus interpolation (PSPI...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-1421
... extrapolation receiver hydro-fracture gather extrapolation imaging local velocity model shot gather reservoir characterization main menu passive seismic data excitation time hydro-fracture source seg eage salt model migration image wavefield extrapolation noise upstream oil...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-2441
... source-side diffracted multiple diffraction water bottom reservoir characterization multiple prediction algorithm new method algorithm diffractor modeling & simulation upstream oil & gas common-p gather source-side multiple wavefield extrapolation diffracted multiple...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-2451
... Summary Despite the development of excellent techniques for predicting multiples such as convolution based or wavefield extrapolation based approaches, subtracting multiples in the data using the predicted multiples still remains as a challenge. The difficulty stems from the fact that many...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-1997
... propagation have proven to be a challenge in 3-D. By using ideas from “ compressed sensing ”, we are able to formulate the (inverse) wavefield extrapolation problem on small subsets of the data volume, thereby reducing the size of the operators. According to compressed sensing theory, signals can...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-2040
... SUMMARY One-way Riemannian wavefield extrapolation (RWE) on computational meshes conforming to the direction of turning-wave propagation is presented as an alternative forward modeling procedure for waveform inversion. Forward modeling tests demonstrate that the RWE approach may...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-2240
... using this partitioning algorithm is illustrated with imaging results from prestack depth migration of the Marmousi dataset. INTRODUCTION Seismic migration by phase shift (also referred to as wavefield extrapolation with phase shift) was proposed as an accurate and efficient method...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-2245
... SUMMARY Single-scattering imaging consists of two steps: wavefield extrapolation, to reconstruct source and receiver wavefields from recorded data, and imaging, to extract from the extrapolated wavefields the locations where reflectors occur. Conventionally, the imaging condition indicates...

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