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Keywords: background velocity
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Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3581244
... porosity prediction reservoir characterization applied geoscience compaction trend porosity burial pressure regime background velocity compaction seismic velocity tobago Reservoir porosity prediction from seismic velocity Reza Daneshvar* BHP (Retired), Gavin Thomas, Stanislav Kuzmin...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427448
... Penetrating Radar (GPR) dataset to demonstrate the feasibility of the proposed workflow. Presentation Date: Monday, October 12, 2020 Session Start Time: 1:50 PM Presentation Time: 3:30 PM Location: Poster Station 5 Presentation Type: Poster deep learning background velocity geophysics neural...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215153
... field at the scat- 10.1190/segam2019-3215153.1 Page 5045 © 2019 SEG SEG International Exposition and 89th Annual Meeting terer, q= r0/r the density ratio, m= 1 (c0/c)2 the velocity contrast, and c0 = p k0/r0 the background velocity. It fol- lows that the contrast source function c is a combination...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215459
... ABSTRACT Reflection-waveform inversion (RWI) utilizes reflection data to recover the background velocity. Due to the limited apertures of reflection data illuminating targets, and the trade-off between the depth of reflectors and the average velocity above the reflectors, RWI is inherently ill...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3211346
... background velocity geophysics seg international exposition gradient reservoir characterization high-wavenumber artifact energy norm waveform inversion information artifact perturbation imaging condition inversion velocity perturbation background model Alkhalifah , T. , 2015...
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-2017-17748783
... regularization regularization term dso regularization background velocity operator full waveform inversion reservoir characterization almomin regularization residual biondi saudi arabia government tfwi amplitude inversion upstream oil & gas tomographic update operator...
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-2017-17657809
... information-based wave-equation inversion : Geophysics , 74 , no. 6 , WCC27 – WCC36 , 10.1190/1.3243073 . velocity model inversion source-domain fti background velocity plane-wave source true velocity velocity estimation early-arrival waveform inversion workflow misfit function...
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-2016-13777425
...: ORAL background velocity anomaly underestimation fd stencil finite difference stencil correction sjoerd isotropic homogeneous velocity finite difference stencil reservoir characterization ridder seg seg international exposition gradiometry magnitude velocity map anisotropy upstream...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5917336
... frequen- cies. Correspondingly, the space decomposition follows a coarse-to-fine scheme. Instead of using fixed subsur- face offset range, in our adaptive approach, the adequate range is dynamically determined by measuring the data fitting at each background velocity step. Results from a synthetic example...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5799849
... and background velocity. The implementation of Gaussian beam demigration algorithm can provide theoretical basis for Gaussian-beam based linearized waveform inversion. shot gather demigration operator upstream oil & gas gaussian beam demigration wavefield background velocity china university...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1169
... klime inversion method inversion algorithm frequency domain gaussian packet shot gather background velocity wang time domain formula reservoir characterization seg denver 2014 The scatterer inversion method using scattering Gaussian packet Hui Li, Huazhong Wang, School of ocean and earth...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1149
... loop to update extended the reflectivity and the outer loop to update the background velocity. In order to accelerate the convergent rate of the two-stage scheme, we propose two different approximations of diagonal Hessian and use them as preconditioners in the inner and outer loop respectively...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0580
... when carried out to second order. We illustrate our method in detail with a very simple single reflector model in a laterally invariant background velocity. INTRODUCTION Recently, a number of techniques have been developed that at- tempt to recover velocity information, or more generally, impedance...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1479
... characterization artificial intelligence robust approach reconstruction migration modeling error linear inverse problem seg houston 2013 invertibility data pair formulation robustness matrix least-square migration imaging inversion background velocity borcea regularization upstream oil & gas...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0878
... to reduce the well- known cycle-skip problem. Introduction For seismic migration of multi-shot surface data it is necessary to determine a kinematically correct, smooth background velocity so as to build a sharp and reliable image of the subsurface. As a tool for velocity model building, waveform inversion...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-4030
.... smooth background velocity migration detailed velocity model building information background velocity interpretation upstream oil & gas velocity anomaly low velocity anomaly tomography velocity model building karst zone velocity model karst modeling reservoir characterization karst...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-4227
... SUMMARY In many applications, sequestering CO2 underground for example, determining whether or not the medium has changed is of primary importance, with secondary goals of locating and quantifying that change. We consider an acoustic model of the Earth as a sum of a smooth background velocity...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-2554
... inverse scattering to develop a data- driven theory for near-offset reconstruction. The prestack reflection data are imaged using a constant background velocity. This image is used as a model to generate the events that were not recorded. When the data are precrit- ical, the method predicts primaries...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2004 SEG Annual Meeting, October 10–15, 2004
Paper Number: SEG-2004-0107
... oil & gas symmetry polar symmetry background velocity reservoir characterization slowness vector shear wave anisotropic media isotropic background media iteration application equation inclination initial background velocity triclinic symmetry slowness component pšencík slowness...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-1247
... wavefield measured on the surface. The horizontal position x and the wavenumber K form a Fourier transform pair. The temporal wavenumber kvo where is angular frequency and vo is the average background velocity. Details of this derivation may be found in Molyneaux and Witten (1993). For the 3-D case...
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