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Anisotropy (seismic)

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Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-0278
... of the shale. This study examines two applications of seismic data specific to shales: (1) changes in azimuthal anisotropy for mapping natural fractures, and (2) changes in the geomechanical properties of the shale in order to predict how the shale will break under induced fracing. Micro seismic data...
Journal Articles
J Can Pet Technol 39 (09).
Paper Number: PETSOC-00-09-00
Published: 01 September 2000
... Foothills of Southern Alberta, Canada. The purpose of this survey was to determine whether the dipping shale strata in the study area exhibit seismic velocity anisotropy, and to obtain an estimate of the error in the imaged location of the target underneath these shales if anisotropy is not taken...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-0119
... Summary A method for displaying prestack seismic data that highlights azimuthal anisotropy is shown. Using this method to make observations of azimuthal anisotropy in prestack seismic data makes it clear that azimuthal anisotropy is observed in all types of seismic data...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-3684
... ABSTRACT Seismic anisotropy refers to seismic waves traveling with different velocity at different propagation angle, usually in consolidated, shale-ornes areas such as in gulf in mexico and West Africa. Conventional isotropic (velocity independent of angle) pre-stack depth migration often...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5876826
... calibration of the seismic data and attributes to rock properties. Analysis of the PP anisotropy at well control confirmed that high Vfast velocities combined with low anisotropy indicates relatively low fracture density. Conversely, lower Vfast velocity combined with relatively high anisotropy indicates...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427877
... Based on Monti Carlo simulation using laboratory measured rock physics data, we studied the effect of seismic anisotropy on the AVO gradient B and compared it with the gas saturation effect on AVO gradient. Our study shows that the former is usually much greater than the latter, and the seismic...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216278
... variation anisotropic characteristic fracture frequency-dependent anisotropy dispersion anisotropy seismic wave frequency-dependent anisotropy impact factor reservoir characterization phase velocity porosity characteristic china university Chapman , M. , 2003 , Frequency...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428143
... resolution reflection khz slowness exploration geophysicist 10 fracture reservoir characterization symmetry axis wave energy seg international exposition anisotropy Seismic imaging of a carbonate rock block with fracture-induced anisotropy Rie Nakata (University of Tokyo), Christophe Matonti...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 7–10, 2016
Paper Number: SPE-183278-MS
... the reservoir model long production history matching. Reservoir Characterization Upstream Oil & Gas information anticline orientation production history Azimuthal Fourier Coefficient anisotropy seismic anisotropy analysis fracture distribution awali anticline structure bahrain fracture...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13974640
... equation attenuation anisotropy seismic attenuation anisotropy amplitude university anisotropy attenuation barnett shale azimuth reservoir characterization oklahoma annual meeting seg seg international exposition attenuation estimation result fracture frequency corresponding frequency...
Proceedings Papers

Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-1695
...S T 9 . 6 Integrating observations of elastic anisotropy: constrained inversion of seismic kinematic data P. R. Williamson*, ??A. Sexton, Elf Geoscience Research Centre, London, and S. Xu, Birbeck College, London SUMMARY Accurate estimation of anisotropy is important for optimum seismic imaging...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5898796
... in combination with a complex velocity field. In turn, this uncertainty leads to wells missing their targets as well as increased drilling risks. Borehole sonic-derived anisotropy magnitudes may provide constraints to the seismic velocity model, but the applicability of sonic-derived anisotropy to surface...
Proceedings Papers

Paper presented at the 2002 SEG Annual Meeting, October 6–11, 2002
Paper Number: SEG-2002-1002
... Summary In processing multicomponent seismic data the velocity ratio vp/vs is a parameter of great importance. Converted wave binning relies upon it and the use of an incorrect value may lead to poor imaging results. Seismic anisotropy and subsurface heterogeneities, such as gas clouds, cause...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-1803
... ABSTRACT We describe velocity anisotropy due to multiple scattering from thin isotropic layers in the context of forward modeling seismic amplitudes from well-logs for large ray-parameters, wide-angles, or large offsets. This study is built upon a multi-scale forward model that is linearized...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3211060
... ABSTRACT A new seismic attribute, , provides a method to more practically estimate seismic anisotropy from real seismic data. We derive an expression for this quantity from analyses of amplitude variation with offset (AVO) inversion with full Zoeppritz solutions for P-wave reflection...
Proceedings Papers

Paper presented at the 2001 SEG Annual Meeting, September 9–14, 2001
Paper Number: SEG-2001-1740
... rock samples including shales, coals, sands, sandstones, and carbonates have been measured using this method. The results show that clays and fine layering in sedimentary rocks are the main causes of seismic anisotropy. Very little seismic anisotropy exists in reservoir rocks like sands, sandstones...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-200
... orientation of crack systems involves anisotropy of seismic wave velocity. The existence of relationship between crack and seismic allowed to use active seismic methods. Seismic refraction method and Multichannel Analysis of Surface Waves (MASW) were used to research. The present study was carried out...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition and Conference, November 1–4, 2010
Paper Number: SPE-137986-MS
... data provides a means of detecting and characterizing fractures before drilling. Seismic anisotropy investigation for fracture detection has been carried out in a carbonate oil field located in offshore United Arab Emirates (U.A.E). Target reservoirs are lower cretaceous carbonates mainly consisting...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-0302
... Summary The well-to-seismic tie is not only the best way to tie seismic data back to a ground truth by comparison with well-log data using synthetic seismograms for seismic interpretation purposes, but it also provides very valuable seismic anisotropy information. In this paper, we present our...
Proceedings Papers

Paper presented at the 1991 SEG Annual Meeting, November 10–14, 1991
Paper Number: SEG-1991-0034
... analysis multiazimuthal seismic reception lithology polarization shear wave rotation Borehole Geophysics 2: VSP I Tuesday Morning, November 12th Multiazimuthal Seismic Reception in a Borehole: Implications on Field Delineation of Seismic Anisotropy Ranajit Chose* and Tow Takahashi, OYO Corp., Japan...

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