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Keywords: phase shift
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3420118
... to determine formation conductivity directly from the measurements. The formation conductivity found in such a way is referred to as apparent conductivity. Two apparent conductivities are introduced accordingly: one associated with phase shift, and the other associated with attenuation. By doing so...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214515
...: Monday, September 16, 2019 Session Start Time: 1:50 PM Presentation Start Time: 3:30 PM Location: 214D Presentation Type: Oral phase correction geophysics upstream oil & gas van der baan phase shift skewness seismic data reference trace reservoir characterization similarity zero...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216779
... of the traveltime with respect to nodal locations and ray velocity directions. In this study, we focus on the identification of caustic points and their types along the stationary path in order to account for the phase shift of the complex-valued Green’s functions. The same finite-element scheme used...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216088
... Time: 1:50 PM Location: Poster Station 1 Presentation Type: Poster application upstream oil & gas phase shift resolution reservoir characterization phase component connectivity cepstrum domain spectrum new application thick reservoir description seg international exposition...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998109
... of SPS which could be used to distinct mineralized and unmineralized samples, sulfide-bearing samples exhibit significant phase shifts, and the shifts depends on the content of polymetallic sulfides. Presentation Date: Wednesday, October 17, 2018 Start Time: 9:20:00 AM Location: Poster Station 13...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13945703
... Architecture (SA) indexing scheme. As an example, the Phase Shift Plus Interpolation (PSPI) technique is used to image 3-D hexagonal data in SA. A comparison of post-stack depth imaging of the 3-D SEG/EAGE model results is provided between images using the proposed method and traditional rectangular approach...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5865737
... propagation time dispersion error solid line time dispersion prediction dispersion fd scheme correction equation upstream oil & gas time step phase shift backward propagation time dispersion transform Time dispersion prediction and correction for wave propagation Meixia Wang*, Statoil...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0543
... synthetic aperture source array reservoir characterization csem source array artificial intelligence seg denver 2014 anomaly wet field phase shift electromagnetic field Optimized 3D synthetic aperture for CSEM Allison Knaak and Roel Snieder, Colorado School of Mines SUMMARY Controlled-source...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0439
... about receiver coupling. The approach we present provides an explanation to the common observation of dissimilar horizontal receiver measurement responses. azimuth simulation coupling parameter amplitude receiver coupling reservoir characterization phase shift correlation sediment...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1217
... that this valve successfully prevent the drainage effect through pore fluid line. Phase shift by electronics: fake attenuation Ideally, the measured phase should be only the reflection of the mechanical quality factor of the rock sample. But in actual experiments, the electronic circuits can cause phase shift too...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0159
... operators to the isotropic wavefields. In this paper, we firstly provide a mathematical derivation on the p phase shift of the crosscorrelation-based images of which the P- and S-waves are separated by divergence and curl calculations. Then, we propose to correct this phase shift by multiplying the final...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0171
... phase shift anomaly crossline direction synthetic aperture detectability ratio vector electromagnetic field energy compensation term synthetic aperture source csem field 3D synthetic aperture and steering for controlled-source electromagnetics Allison Knaak and Roel Snieder, Colorado School...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0961
... velocity model reference list upstream oil & gas acquisition hz geophone application reservoir characterization low frequency data main menu land electronics fwi velocity model phase shift frequency Land seismic low frequencies: acquisition, processing and full wave inversion of 1.5 - 86...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1175
... computer experiment attenuation upstream oil & gas laboratory experiment experimental setup burlini reservoir characterization main menu numerical support time step phase shift frequency propagation Numerical support of laboratory experiments: Attenuation and velocity estimations Erik H...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1282
... computing technologies. In particular, our implementa- tion of the Phase Shift Plus Interpolation (PSPI) method is characterized by fast running time, good quality results under low signal-to-noise ratio conditions and excellent results for steep dips. We provide a novel computational dataflow scheme...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-4071
... direction to avoid them. Numerical tests confirm our approach, which eliminates this kind of artifact and speeds up convergence. artifact gradient williamson velocity update reservoir characterization operator subsurface upstream oil & gas phase shift velocity analysis annual...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-0805
...). We introduce the concept of synthetic aperture to CSEM data. Synthetic aperture allows us to design sources with specific radiation patterns for different purposes. phase shift solid line hydrocarbon reservoir synthetic aperture upper panel application reservoir characterization...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-1423
... attributes: correlation modulus defining coherency and correlation phase shift relating to dip of events. This method is based on circular statistics concepts. Extracted attributes are neither instantaneous nor global, but estimated smoothly and locally by using shaping regularization. The technique...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-1053
.... The method, applied to neighbouring seismic traces, can extract at once two seismic attributes: correlation amplitude defining coherency and lateral phase shift relating to dip of events. This technique is computationally inexpensive and does not require any scanning or iteration while the local windowing...
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...

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