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Keywords: symmetry axis
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424466
... of uncertainties in recorded sonic signals. The process first converts measured P-wave velocity into the symmetry axis values using the Thomsen weak vertical transverse isotropic equation and then performs fluid substitution to remove the fluid effects on velocity readings. In a demo dataset, the resulting log...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428143
... transverse anisotropy with a symmetry axis normal to the 10 cm-scale fractures. In order to delineate heterogeneities in the sample due to fractures, we proposed to apply full waveform inversion to the dataset. With synthetic studies, we illustrated that the velocity model can be nearly perfectly...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428292
... synthetic data. Presentation Date: Tuesday, October 13, 2020 Session Start Time: 8:30 AM Presentation Time: 8:55 AM Location: 361A Presentation Type: Oral clojure variation signature seg international exposition programming language symmetry axis impedance inversion exploration...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214496
... group angles and group velocities. Restricting to transversely isotropic medium with vertical symmetry axis, we demonstrate that the extreme gradient boosting and support vector machine provide accurate results. Furthermore, we also propose a modular neural network architecture with multiobjective...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215358
... better consistency than that of isotropic location method. Presentation Date: Wednesday, September 18, 2019 Session Start Time: 1:50 PM Presentation Start Time: 4:45 PM Location: 217B Presentation Type: Oral annual meeting seg 10 symmetry axis location method anisotropic location sensor...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2994785
... poroelasticity theory seg international exposition structural geology bulk modulus shale symmetry axis poroelasticity theory Batzle , M. , and Z. Wang , 1992 , Seismic properties of pore fluids : Geophysics 57 , 1396 – 1408 , 10.1190/1.1443207 . Biot , M...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17587724
... ABSTRACT The accurate and efficient calculation of traveltimes in heterogeneous three-dimensional (3-D) media with transversely isotropic (TI) assumptions (with or without tilt of symmetry axis) is essential for processing and imaging using seismic data in many realistic geological scenarios...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17325429
... ABSTRACT Transversely isotropic media with the tilted symmetry axis (TTI) is one of the most important anisotropic media used in seismic prospecting and researches. Therefore, high efficient kinematic ray tracing method in TTI media has significant research and application values. The 21...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17650934
... oil & gas compensation artificial intelligence geophysics optimization term reservoir characterization q-rtm algorithm equation amplitude seg seg international exposition operator symmetry axis frequency range annual international meeting compensation rate phase velocity annual...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17663170
... symmetry axis azimuth wet model fracture model Mateeva , A. , J. Lopez , H. Potters , J. Mestayer , B. Cox , D. Kiyashchenko , P. Wills , S. Grandi , K. Hornman , B. Kuvshinov , W. Berlang , Z. Yang , and R...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5867797
... are straight forward and easy to control. The elastic constant, C 13 , is usually measured at 45 degree to the symmetry axis. Although it can be estimated from both Vp and Vsv measured at this angle, Vp at 45 degree is commonly used because of the relatively low error bar of P-wave measurement compare...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5750183
... Summary A recently published analytic technique for computing locations of microseismic events jointly with velocities of homogeneous isotropic models is extended to surface microseismic monitoring and transverse isotropy with a tilted symmetry axis (TTI). The analysis of traveltimes...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0437
... media with horizontal symmetry axis (HTI) as explicit functions of the anellipticity parameter ? and the symmetry axis azimuth ? in inhomogeneous background media. Specifically, our expansion assumes an inhomogeneous elliptically anisotropic background medium, which may be obtained from well information...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0875
... acquisition design, inversion workflow, and parameterization. Here, we derive the Fréchet kernel for FWI of multicomponent data from a 2D VTI (tranversely isotropic with a vertical symmetry axis) medium. The kernel is obtained by linearizing the elastic wave equation using the Born approximation and employing...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0938
.... The difference of the one-way travel time caused by this cubic anisotropy for a 1km thick 3D numerical model is up to 0.02s, 0.06s and 0.03s for P wave, SV wave and SH wave, respectively. symmetry axis cubic anisotropy shear-wave splitting upstream oil & gas lab measurement reflection...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0295
... is built with the approximation of setting the shear wave velocity along the symmetry axis to zero. Based on the same dispersion relation, Zhou et al. (2006a) introduced an auxiliary variable and converted the equation into two coupled second order PDEs, which allows solving the quasi-P wave...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0291
... Summary In this paper, an extension of low-frequency upscaling methods to handle more complicated media is developed. Increased variability and anisotropy with a tilted symmetry axis (TTI) are now handled. We show that strong contrasts in elastic properties have a dramatic effect on seismic...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0613
... isotropic formation group velocity flexural wave borehole axis upstream oil & gas phase velocity acoustic multipole dipole source slowness simulated waveform isotropic formation anisotropic formation symmetry axis Acoustic multipole logging in deviated wells penetrating transversely...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0633
... anisotropic media waveform inversion surface seismic data machine learning genetic algorithm evolutionary algorithm objective frazer anisotropy reservoir characterization media seismic data azimuthal anisotropy upstream oil & gas symmetry axis optimization problem mallick inversion...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0058
... traveltime pyramid rotation vti media slowness vector symmetry axis traveltime pyramid denote equation seg houston 2013 reservoir characterization migration isochrone offset-midpoint traveltime pyramid hti media media alkhalifah The azimuth-dependent offset-midpoint traveltime pyramid...

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