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Keywords: datum
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427852
... reflectivity and the virtual data on the datum are estimated in sequence or simultaneously. The synthetic examples show that this LSR method can improve the accuracy and resolution of the redatumed seismograms. Presentation Date: Tuesday, October 13, 2020 Session Start Time: 9:20 AM Presentation Time: 9:20...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426155
... exposition modeling & simulation high-speed gravel exploration area inversion static correction oil geophysical prospecting velocity modeling technology migration imaging application datum Research and application of velocity modeling technology of prestack depth migration on undulating...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215295
... to smooth the ground surface, and then the approximate true ground surface is obtained as the migration datum, which effectively solves the problem that the large smoothed ground surface is not suitable for the imaging with severe elevation variations. The high wavenumber moveout is corrected by applying...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216093
... that often needs to be discretized consistently using a fine grid, to delineate for example reservoir scale features. Building on the recent development of target-oriented imaging and inversion, we split the subsurface space into the overburden, above a datumlevel, and the target zone beneath the datum. Our...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-W6-03
... the induced seismicity and the 3-D seismic travel times. We apply our new method to an induced seismicity dataset with events up to M L 3.6, recorded using a shallow-well monitoring array in Alberta, Canada. Reconciling the seismic processing datum with the microseismic datum was found to be a critical...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17777036
.... We firstly investigate the effect on the image of beam PSDM via the numerical simulation where the observation surface is strongly rugged, and confirm significant error in the image. We then propose a convenient solution for overcoming this problem in which the floating datum changes...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17384006
... from the earth's surface to an arbitrary datum at depth using the one-way reciprocity theorems of convolution and correlation type. The redatuming process is done in three steps: (a) retrieving the downward Green's function for sources at the earth's surface and receivers at the datum, (b) retrieving...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17730961
... subsurface model marchenko datum transmission image vasconcelo teeis imaging annual meeting reservoir characterization seg seg international exposition teei system upstream oil & gas reflection reservoir only reflection transmission response van der neut transmission response de...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13962619
... method extrapolates the multicomponent data from the surface to the datum in an elastic model using the elastic wave equation. A synthetic example verifies the effectiveness of the proposed method. Presentation Date: Wednesday, October 19, 2016 Start Time: 8:25:00 AM Location: Lobby D/C Presentation...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13849319
... statics is consistent with accurate near-surface velocity model. The datum statics is calculated by equation 1, in which Td represents seismic reference datum statics from smoothed topography to reference datum. Tu represents vertical time difference before and after smoothing of near-surface model...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5891123
... Summary Receiver deghosting algorithms assuming a flat sea surface may be sub-optimal in the case of significant sea surface datum variations. We propose a method that begins by using the seismic data to calculate a sea surface profile. The sea surface profile is then provided to a modified...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0513
... combinations of decimation, interpolation, and re- datuming to match the sampling and information properties of the two datasets. Results show that 4D noise levels are lowest when the matching method explicitly models the baseline and monitor wavefields in the subsurface. Accurate matching requires...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0003
... shallowest layer annual international meeting seg houston 2013 upstream oil & gas initial multiple layer model tomography refraction static effective average velocity datum elevation Inversion: A tool to tie near-surface static corrections Ralph Bridle* and AbdulAziz Al-Saad, Saudi Aramco...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0258
... for suppressing artifacts, since these factors have an effect on image quality in terrestrial RTM. In this paper, we first describe the errors resulting from the static correction for rugged topographic changes. We then show the imaging distortions by migrating from the re-datumed planar surface by using...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0767
... is not a satisfying enough solution and dy- namic operators should be a better choice for the near-surface problem. In this paper, we propose to do near-surface layer re- placement with 3D data-driven redatuming operators to go to- wards the datum level and using a smooth replacement model to come back to the surface...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-1152
...New datums by the end of the next decade for the United States of America Daniel R. Roman*, Dru A. Smith, Vicki A. Childers, NOAA s National Geodetic Survey Summary The National Geodetic Survey (NGS) is the lead federal agency on the Federal Geodetic Control Subcommittee (FGCS), which is a part...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-2637
... migration modeling wave-equation modeling acquisition synthetic data complex structure post-stack time migration reference list velocity model application interpretation selection seg houston 2009 reservoir characterization datum upstream oil & gas imaging field data...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-3979
... ABSTRACT We present a sub-datum ray-based tomography working on angle-domain common-image gamers produced by wave-equation migration. In subsalt settings, we show the advantage of this approach over usual ray-based tomography using common-image gamers produced by Kirchhoff migration. First, we...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-3671
..., — limit the tomographic update to the half-space below the complex overburden. velocity distribution reflection angle migration reservoir characterization inversion nonlinear tomography overburden tomography kirchhoff migration technical program committee determination datum wave...

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