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Relevant bibliographies by topics / Azimuthal anisotropy

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Academic literature on the topic 'Azimuthal anisotropy'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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Journal articles on the topic "Azimuthal anisotropy"

1

Al‐Dajani, Abdulfattah, and Tariq Alkhalifah. "Reflection moveout inversion for horizontal transverse isotropy: Accuracy, limitation, and acquisition." GEOPHYSICS 65, no. 1 (2000): 222–31. http://dx.doi.org/10.1190/1.1444713.

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Horizontal transverse isotropy (HTI) is the simplest azimuthally anisotropic model used to describe vertical fracturing in an isotropic matrix. Assuming that the subsurface is laterally homogeneous, and using the elliptical variation of P-wave NMO velocity with azimuth measured in at least three different source‐to‐receiver orientations, we can estimate three key parameters of HTI media: the vertical velocity, anisotropy, and the azimuth of the symmetry axis. Such parameter estimation is sensitive to the angular separation between the survey lines in 2-D acquisition or, equivalently, to source

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2

Kolesnikov, YuI, K. V. Fedin, and L. Ngomayezwe. "Compression waves reflection from the low-velocity azimuthally anisotropic medium: a physical model study." Geophysical Journal International 221, no. 2 (2020): 1320–26. http://dx.doi.org/10.1093/gji/ggaa031.

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SUMMARY Interest in azimuthal anisotropy of rocks is mainly associated with fractured reservoirs, which may contain hydrocarbon deposits. Cracks in such deposits in most cases have a subvertical orientation, which is caused by the predominance of vertical stresses in rocks over horizontal ones. To determine the azimuthal direction of fractures, one can use, in particular, the dependence of the reflection coefficients of elastic waves on the boundaries with such media on the azimuth. This paper presents the results of physical modelling, demonstrating this dependence. To conduct experiments, we

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3

Mallick, Subhashis, Kenneth L. Craft, Laurent J. Meister, and Ronald E. Chambers. "Determination of the principal directions of azimuthal anisotropy from P-wave seismic data." GEOPHYSICS 63, no. 2 (1998): 692–706. http://dx.doi.org/10.1190/1.1444369.

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In an azimuthally anisotropic medium, the principal directions of azimuthal anisotropy are the directions along which the quasi-P- and the quasi-S-waves propagate as pure P and S modes. When azimuthal anisotropy is induced by oriented vertical fractures imposed on an azimuthally isotropic background, two of these principal directions correspond to the directions parallel and perpendicular to the fractures. S-waves propagating through an azimuthally anisotropic medium are sensitive to the direction of their propagation with respect to the principal directions. As a result, primary or mode‐conve

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4

Gavin, Lisa J., and David Lumley. "The effects of azimuthal anisotropy on 3D and 4D seismic amplitude variation with offset responses." GEOPHYSICS 84, no. 6 (2019): C251—C267. http://dx.doi.org/10.1190/geo2018-0450.1.

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Seismic reflection amplitude variation with source-receiver offset (AVO) is an important tool in hydrocarbon exploration and reservoir monitoring, due to its sensitivity to elastic rock properties that are affected by changes in pore-fluid saturation and pressure. In most cases, 4D seismic feasibility studies and interpretation analyses assume that the earth is isotropic. This assumption can be problematic because it is becoming increasingly apparent that anisotropic rocks are quite common. Furthermore, the presence of even small amounts of anisotropy can have significant effects on AVO, and i

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Birdus, Sergey, Erika Angerer, and Iftikhar Abassi. "MAZ depth-velocity modelling and imaging with azimuthal anisotropy." APPEA Journal 50, no. 2 (2010): 723. http://dx.doi.org/10.1071/aj09087.

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Processing of multi and wide-azimuth seismic data faces some new challenges, and one of them is depth-velocity modelling and imaging with azimuthal velocity anisotropy. Analysis of multi-azimuth data very often reveals noticeable fluctuations in moveout between different acquisition directions. They can be caused by several factors: real azimuthal interval velocity anisotropy associated with quasi-vertical fractures or present day stress field within the sediments; short-wavelength velocity heterogeneities in the overburden; TTI (or VTI) anisotropy in the overburden; or, random distortions due

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Koren, Zvi, and Igor Ravve. "Fourth-order normal moveout velocity in elastic layered orthorhombic media — Part 2: Offset-azimuth domain." GEOPHYSICS 82, no. 3 (2017): C113—C132. http://dx.doi.org/10.1190/geo2016-0222.1.

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Based on the theory derived in part 1, in which we obtained the azimuthally dependent fourth-order normal-moveout (NMO) velocity functions for layered orthorhombic media in the slowness-azimuth/slowness and the slowness-azimuth/offset domains, in part 2, we extend the theory to the offset-azimuth/slowness and offset-azimuth/offset domains. We reemphasize that this paper does not suggest a new nonhyperbolic traveltime approximation; rather, it provides exact expressions of the NMO series coefficients, computed for normal-incidence rays, which can then be further used within known azimuthally de

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7

Xu, Song, Xiao-Ming Tang, Carlos Torres-Verdín, Zhen Li, and Yuanda Su. "Evaluation of 3D shear-wave anisotropy based on elastic-wave velocity variations around the borehole." GEOPHYSICS 86, no. 3 (2021): D103—D112. http://dx.doi.org/10.1190/geo2020-0523.1.

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Aligned fractures/cracks in rocks are a primary source of elastic anisotropy. In an azimuthally anisotropic formation surrounding a borehole, shear-waves (S-waves) split into fast and slow waves that propagate along the borehole and are recorded by a borehole logging tool. However, when the formation has conjugate fractures with orthogonal strike directions, the azimuthal anisotropy vanishes. Hence, azimuthal anisotropy measurements may not be adequate to detect orthogonal fracture sets. We have developed a method for obtaining azimuthal and radial S-wave anisotropy parameters simultaneously f

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Gavin, Lisa J., and David Lumley. "Stress-induced seismic azimuthal anisotropy, sand-shale content, and depth trends offshore North West Australia." GEOPHYSICS 82, no. 2 (2017): C77—C90. http://dx.doi.org/10.1190/geo2015-0709.1.

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Seismic azimuthal anisotropy is apparent when P-wave velocities vary with source-receiver azimuth and downward-propagating S-waves split into two quasi-S-waves, polarized in orthogonal directions. Not accounting for these effects can degrade seismic image quality and result in erroneous amplitude analysis and geologic interpretations. There are currently no physical models available to describe how azimuthal anisotropy induced by differential horizontal stress varies with sand-shale lithology and depth; we develop a model that does so, in unconsolidated sand-shale sequences offshore North West

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Zhang, Jing, Jie Qi, Yijin Zeng, Kurt Marfurt, and Roger Slatt. "Azimuthal anisotropy analysis applied to naturally fractured unconventional reservoirs: A Barnett Shale example." Interpretation 8, no. 4 (2020): SP13—SP29. http://dx.doi.org/10.1190/int-2019-0206.1.

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Studying the seismic responses of velocity and amplitude on wide-/full-azimuth seismic data is now common for unconventional reservoir characterization. Velocity variation with azimuth (VVAz) and amplitude variation with azimuth (AVAz) are two of the most popular tools to map not only the relative intensity and orientation of natural fractures but also the strength and orientation of the maximum horizontal stress SH. We prestack time migrated a wide-azimuth Barnett Shale survey in North Texas into eight azimuths and reduced noise on the gathers using prestack structure-oriented filtering. We t

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Lynn, H. B., and L. A. Thomsen. "Reflection shear‐wave data collected near the principal axes of azimuthal anisotropy." GEOPHYSICS 55, no. 2 (1990): 147–56. http://dx.doi.org/10.1190/1.1442821.

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The presence of vertically oriented fractures and/or unequal horizontal stresses has created an azimuthally anisotropic earth, in which shear‐wave (SH) data collected along the principal axes of the anisotropy display time and reflection amplitude anomalies. Amoco shot two crossing shear‐wave (SH) lines that were approximately parallel to the orthogonal principal axes of the azimuthal anisotropy. At the tie point, these crossing SH lines display a time‐variant mis‐tie. The tie point also displays reflection‐coefficient anomalies, attributable to azimuthally dependent shear‐wave velocities. Fie

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Dissertations / Theses on the topic "Azimuthal anisotropy"

1

Pandit, Yadav. "AZIMUTHAL ANISOTROPY IN HEAVY ION COLLISIONS." Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1353871180.

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Perez, Anisa Marie. "Azimuthal analysis of hybrid gathers." Thesis, [Austin, Tex. : University of Texas, 2009. http://hdl.handle.net/2152/ETD-UT-2009-05-118.

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Thesis (M.S. in Geological Sciences)--University of Austin, 2009.<br>Title from PDF title page (University of Texas Digital Repository, viewed on August 11, 2009). Includes bibliographical references.

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Cole, Philip Bruce. "Anisotropy of the zone of exhumed continental mantle and the structure of the earliest formed oceanic crust west of Iberia." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288464.

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Shams, Asghar. "Application and implementation of seismic azimuthal anisotropy for reservoir characterization." Thesis, Heriot-Watt University, 2004. http://hdl.handle.net/10399/351.

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Watson, Kathryn Anne. "Differentiating anisotropy and lateral effects using azimuthal resistivity offset Wenner soundings." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390621.

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6

Liu, Weining. "Analysis of PS-converted wave seismic data in the presence of azimuthal anisotropy." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9970.

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Shear-wave splitting and azimuthal variations of seismic attributes are two major anisotropic effects induced by vertically-aligned fractures. They both have influences on seismic data processing and interpretation, and provide information on fracture properties. Azimuthal variations in P-wave data have been intensively studied to improve imaging and obtain fracture parameters. However, azimuthal variations in PS-converted wave seismic data, particularly the velocity variation in PS-converted wave data, have not been well studied. Shear-wave splitting has been frequently used to estimate fract

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Zhang, Sufang. "Deep structure beneath the Central-South Tibet crustal density modelling and azimuthal anisotropy variation inferred from Quasi-Love wases." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3621.

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2008/2009<br>The area of the present study is the central part of southern Tibet. It consists of two accreted terranes, Lhasa and Himalaya terranes, which today record the deformation history that originated from the processes of collision between the Eurasia and India plates. Our study of the crust/mantle structure in terms of seismic velocity, density, anisotropy and petrologic composition are undoubtedly significant to deepen the understanding of the continent-continent collision and its dynamics. This PhD thesis can be briefly summarized into four parts that are listed in the follow

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Shanmuganathan, Prashanth. "FIRST MOMENT OF AZIMUTHAL ANISOTROPY IN AU+AU COLLISIONS FROM THE BEAM ENERGY SCAN AT THE RELATIVISTIC HEAVY ION COLLIDER." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1465395347.

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9

Lomnitz, Michael Richard. "Measurement of charmed meson azimuthal anisotropy in Au+Au collisions at a center of mass energy of 200 GeV per nucleon pair at RHIC." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1478709564749636.

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Wu, Yang. "Azimuthal anisotropy in gold-gold collisions at 4.5 GeV center-of-mass energy per nucleon pair using fixed-target mode at the Relativistic Heavy-Ion Collider." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1562355001935965.

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Books on the topic "Azimuthal anisotropy"

1

Watson, Kathryn Anne. Differentiating anisotropy and lateral effects using azimuthal resistivity offset wenner soundings. University of Birmingham, 1999.

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2

fakulteten, Uppsala universitet Teknisk-naturvetenskapliga, and Uppsala universitet, eds. Controlled-source tensor magnetotellurics and its application to the detection of azimuthal anisotropy in the Earth's crust. ACTA Universitatis Upsaliensis, 1994.

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3

Rüger, Andreas. Reflection coefficients and azimuthal AVO analysis in anisotropic media. Society of Exploration Geophysicists, 2002.

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4

T︠S︡vankin, I. D. Seismology of azimuthally anisotropic media and seismic fracture characterization. Society of Exploration Geophysicists, 2011.

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5

Reflection Coefficients and Azimuthal AVO Analysis in Anisotropic Media. 2002.

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6

Seismology of Azimuthally Anisotropic Media and Seismic Fracture Characterization. 2011.

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Book chapters on the topic "Azimuthal anisotropy"

1

Festanti, Andrea. "Azimuthal Anisotropy of D $${^0}$$ 0 Production in Pb–Pb Collisions." In Springer Theses. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43455-1_7.

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2

Lokhtin, I. P., S. V. Petrushanko, L. I. Sarycheva, and A. M. Snigirev. "Using Calorimetry to Investigate the Azimuthal Anisotropy in Heavy-Ion Collisions." In Structure and Dynamics of Elementary Matter. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2705-5_56.

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3

Wang, Jing, Qing-lin Shu, Yu-shan Du, and Qiang Zhang. "Research and Application of Shale Oil Fracture Prediction Method Based on Azimuthal Anisotropy Analysis." In Springer Series in Geomechanics and Geoengineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-2363-1_33.

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4

Li, Aibing, Donald W. Forsyth, and Karen M. Fischer. "Rayleigh wave constraints on shear-wave structure and azimuthal anisotropy beneath the Colorado Rocky Mountains." In The Rocky Mountain Region—An Evolving Lithosphere: Tectonics, Geochemistry, and Geophysics. American Geophysical Union, 2005. http://dx.doi.org/10.1029/154gm29.

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5

Yanovskaya, T. B. "A Technique for Joint Determination of Lateral Velocity Variations and Azimuthal Anisotropy for Surface Waves." In Computational Seismology and Geodynamics. American Geophysical Union, 2013. http://dx.doi.org/10.1029/cs003p0200.

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6

Jaelani, Syaefudin. "Measurement of Non-strange D-Meson Production and Azimuthal Anisotropy in Pb–Pb Collisions with ALICE at the LHC." In Springer Proceedings in Physics. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53448-6_14.

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7

Dixit, Prabhupada. "STAR Measurements on Azimuthal Anisotropy of $$\phi $$ Mesons in Au+Au Collisions at $$\sqrt{s_{NN}}$$ = 27 and 54.4 GeV." In Springer Proceedings in Physics. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2354-8_76.

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8

Forsyth, Donald W., and Aibing Li. "Array analysis of two-dimensional variations in surface wave phase velocity and azimuthal anisotropy in the presence of multipathing interference." In Seismic Earth: Array Analysis of Broadband Seismograms. American Geophysical Union, 2005. http://dx.doi.org/10.1029/157gm06.

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9

Trifonyuk, Lilia, Iryna V. Soltys, Alexander G. Ushenko, Yuriy A. Ushenko, Alexander V. Dubolazov, and Jun Zheng. "Azimuthally Invariant Mueller-Matrix Mapping of Optically Anisotropic Networks of Biological Tissues and Fluids." In Optical Anisotropy of Biological Polycrystalline Networks. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1087-8_4.

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10

Brill, Dieter. "Azimuthally Anisotropic Emission of Pions in Symmetric Heavy-Ion Collisions." In NATO ASI Series. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2516-5_48.

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Conference papers on the topic "Azimuthal anisotropy"

1

Gomez, Cynthia, and Erika Angerer. "Wide‐azimuth processing for azimuthal anisotropy analysis." In SEG Technical Program Expanded Abstracts 2004. Society of Exploration Geophysicists, 2004. http://dx.doi.org/10.1190/1.1851152.

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2

Garotta, Robert. "Detection of azimuthal anisotropy." In SEG Technical Program Expanded Abstracts 1989. Society of Exploration Geophysicists, 1989. http://dx.doi.org/10.1190/1.1889795.

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3

Chichinina, T., R. Avila-Carrera, and V. Bezkhodarnov. "Seismic Anisotropy Analysis of Fractured Reservoirs." In SPE Caspian Technical Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/217536-ms.

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Summary Vertical fractures cause azimuthal anisotropy. To predict the fractures’ azimuth, we use anisotropy analysis of four seismic attributes: NMOA, AVOA, QVOA and Shear-Wave-Splitting (SWS). Namely: the first NMOA-attribute means "Normal-Move-Out velocity versus Azimuth". The second attribute AVOА stands for "Amplitude Versus Offset and Azimuth". The amplitude is understood as the reflection coefficient of the longitudinal (PP) wave. In the SWS analysis, we separate two shear waves from each other (S1 and S2). The S1 -wave has its polarization vector parallel to the plane of the fractures,

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4

Miake, Yasuo. "Azimuthal Anisotropy and the QGP." In NUCLEAR PHYSICS TRENDS: 6th China-Japan Joint Nuclear Physics Symposium. AIP, 2006. http://dx.doi.org/10.1063/1.2398864.

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5

Bishop, K., A. Osadchuk, and M. Stanley. "Analysis Methodology for Azimuthal Anisotropy." In 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.201400656.

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Guo, Tongcui, Guihai Wang, Xinmin Song, et al. "Application of Wide-Azimuth Anisotropy Inversion Predicting Carbonate Fracture Intensity and Direction." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207651-ms.

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Abstract Fractures in carbonate rock are both storing reservoirs and migrating channels for oil and gas, so such fractures are one of the key targets for oil exploration and development. Traditional fracture prediction methods by seismic data include ant tracking cube, coherence cube and other seismic attributes. Fractures predicted by these methods are less accurate. This paper introduces a wide-azimuth anisotropic inversion method to effectively predict the fracture density and direction in carbonates. a wide-azimuth seismic anisotropy inversion workflow is established to predict the fractur

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J. Wombell, R. "Characteristics of Azimuthal Anisotropy in Narrow-Azimuth Marine Streamer Data." In 68th EAGE Conference and Exhibition incorporating SPE EUROPEC 2006. European Association of Geoscientists & Engineers, 2006. http://dx.doi.org/10.3997/2214-4609.201402127.

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C. Moffat, L., R. A. Clark, M. van der Baan, and T. Manning. "Azimuthal Anisotropy Characterization Using 3D Multi-azimuth Towed Streamer Dataset." In 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.201400818.

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Li, Yunyue (Elita). "Image-guided WEMVA for azimuthal anisotropy." In SEG Technical Program Expanded Abstracts 2013. Society of Exploration Geophysicists, 2013. http://dx.doi.org/10.1190/segam2013-0449.1.

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Roure*, Benjamin. "Statistical moments for azimuthal anisotropy characterization." In SEG Technical Program Expanded Abstracts 2014. Society of Exploration Geophysicists, 2014. http://dx.doi.org/10.1190/segam2014-0814.1.

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Reports on the topic "Azimuthal anisotropy"

1

Motta, Arthur, Kostadin Ivanov, Maria Arramova, and Jason Hales. Anisotropic Azimuthal Power and Temperature distribution on FuelRod. Impact on Hydride Distribution. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1184212.

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