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The AAPG/Datapages Combined Publications Database
Showing 20,827 Results. Searched 200,293 documents.
Abstracts: Determining Elastic Constants of an Orthorhombic Material by Physical Seismic Modeling; #90173 (2015)
Faranak Mahmoudian, Gary F. Margrave, P. F. Daley, and Joe Wong
Search and Discovery.com
... a reasonably accurate approximation for P-wave group velocity from the eikonal equation. They obtained an expression for P-wave group velocity...
2015
Wave scattering by the formation velocity perturbation surrounding a fluid-filled borehole
Zhou-Tuo Wei
International Meeting for Applied Geoscience and Energy (IMAGE)
... acoustic logging system, (b) Geometric model of acoustic wave scattering in cylindrical coordinate system for Figure 1(a). Second International...
2022
Effects of tool eccentricity on acoustic logging: Theory and field example
Bo Rao, Yuanda Su, Shengqing Li, Xiaoming Tang
International Meeting for Applied Geoscience and Energy (IMAGE)
...) analysed the effect of tool As shown in Figures 1b and 4b, in the case of tool eccentricity, the dual-cylindrical coordinate system (i.e. tool coordinates...
2024
A Coupled Pore-Scale Modelling Approach to Capture Macro-Scale Stress-Dependent Permeability of Rocks
Keivan Khaleghi, Stephen Talman, Alireza Rangriz Shokri, Bauyrzhan K. Primkulov, Abel S. Juncal, Rick J. Chalaturnyk
Unconventional Resources Technology Conference (URTEC)
.... Initially, a list of radii and coordinates of the center of each spherical grain within a given sample volume and its associated porosity were exported...
2019
Marine Seismic Sources: Part XII: Sound in the Sea
Martin Landrø, Lasse Amundsen
GEO ExPro Magazine
... the energy spreads to fill it. Therefore, the energy per unit length of the wave must get smaller. Spherical and cylindrical spreading are two simple...
2012
Abstract: Regular Grids Travel Time Calculation Fast Marching with an Adaptive Stencils Approach; #90187 (2014)
Zhengsheng Yao, Mike Galbraith, and Randy Kolesar
Search and Discovery.com
... (a) a plane wavefront and (b) circular wave from a point source propagating through a grid model. Numerically solving this equation produces first arrival...
2014
AVO Modeling of Monochromatic Spherical Waves: Comparison to Band-Limited Waves; #41567 (2015)
Charles Ursenbach, Arnim Haase
Search and Discovery.com
... reflection coefficients, the Rayleigh wavelet approach of equation 1 also provides useful insight into the relationship between plane-wave and spherical-wave...
2015
Inverse scattering theory: Time-dependent perturbation theory for wave scattering in time varying media
Xingguo Huang, Ru-Shan Wu, Pan Zhang, Wenrui Ye, Morten Jakobsen
International Meeting for Applied Geoscience and Energy (IMAGE)
... equation, electromagnetic, acoustic inverse scato tering theory. Numerical solutions in which time-perturbation wave equations are discretized in time...
2022
Spherical-Wave Computational AVO Modelling in Elastic and Anelastic Isotropic Two-Layer Media; #41564 (2015)
Arnim B. Haase, Charles P. Ursenbach
Search and Discovery.com
...Spherical-Wave Computational AVO Modelling in Elastic and Anelastic Isotropic Two-Layer Media; #41564 (2015) Arnim B. Haase, Charles P. Ursenbach...
2015
Abstract: Orientation Analysis of Borehole Geophones in Vertical and Deviated Wells: Calibration Consistency; #90174 (2014)
Peter G. Gagliardi and Don C. Lawton
Search and Discovery.com
... coordinates of the source location, according to: xs ys s arctan . (2) Additionally, since Equation 1 will only produce angles between...
2014
Abstract: P- and S-Wave Velocity Measurements and Pressure Sensitivity Analysis of AVA Response; #90211 (2015)
Tiewei He and Douglas Schmitt
Search and Discovery.com
... and S wave transducers on each end of the cylindrical sample. This arrangement is then hermitically sealed. The prepared sample is then put in a pressure...
2015
Multifocusing Stack Technique for Subsurface Imaging, #40749 (2011)
Sunjay Sunjay,
Search and Discovery.com
...- involved in equation (1) are curvature radii of the fictitious wave fronts ΣS and ΣG. It is clear from Figure 3 that, for a given central ray, the radii R...
2011
Abstract: Tau-P Seismic Data Processing: Fast Slant Stack Using the Hartley Transform
Leong Lap Sau, Ng Tong San
Geological Society of Malaysia (GSM)
... be reconstructed by an inverse transform after windowing in the T-P plane. Cylindrical slant stack procedures permit a plane-wave decomposition...
1991
Forward modeling for arbitrary irregular free-surface based on body-fitted grid
Erxiang Wei, Jianping Huang, Zhenchun Li
International Meeting for Applied Geoscience and Energy (IMAGE)
.... Shen, and L. Zhao, 2012, Three-dimensional anisotropic seismic wave modelling in spherical coordinates by a collocated-grid finitedifference method...
2023
Unit-constrained data-driven discovery of a wave equation
Shijun Cheng, Tariq Alkhalifah
International Meeting for Applied Geoscience and Energy (IMAGE)
...Unit-constrained data-driven discovery of a wave equation Shijun Cheng, Tariq Alkhalifah Unit-constrained data-driven discovery of a wave equation...
2024
Finite Difference Modelling: Part IV
Lasse Amundsen, Ørjan Pedersen, Martin Landrø
GEO ExPro Magazine
... the discussion that was started in GEO ExPro Vol. 15, No. 2. The finite difference method applied to the acoustic wave equation gives beautiful wave...
2019
Attenuating non-compressional energy on vertical motion sensors using rotational data
Hassan Masoomzadeh, Fons ten Kroode, Tim Seher, Mohammad Akbar Hosain Zuberi, Alexander Kritski, Harald Westerdahl, Åsmund Sjøen Pedersen, Mark Thompson, Nick Bernitsas, Phil Behn, Philip Baltz
International Meeting for Applied Geoscience and Energy (IMAGE)
...mogeneous and isotropic in a layer below the water bottom, the vector potential ⃗ in that layer satisfies the wave ?? equation 1 2 𝜕 ⃗ = Δ ⃗, 𝐴 𝐴 ?...
2024
Some "Quick-Look" and Wellsite Applications of Wireline Formation Testing Tools with Emphasis on Permeability Indicators as an Aid to Choosing Net Pay Discriminators
P. Cooke-Yarborough
Indonesian Petroleum Association
... until an impermeable barrier is reached, when the pressure wave propagation will become essentially cylindrical. The reservoir section in the area...
1984
-- no title --
user
Search and Discovery.com
... to a spherical-wave reflection coefficient. Direct comparison shows that monochromatic waves have oscillatory, non-decaying weighting functions...
Unknown
-- no title --
user
Search and Discovery.com
... to a spherical-wave reflection coefficient. Direct comparison shows that monochromatic waves have oscillatory, non-decaying weighting functions...
Unknown
Interpretation of first-arrival times of borehole acoustic measurements acquired in high-angle wells using 3D eikonal numerical simulations
Feiyue Xia, Carlos Torres-Verdín
International Meeting for Applied Geoscience and Energy (IMAGE)
... is a high-frequency approximate solution to the elastodynamic wave equation assuming that the wavelength is larger than the heterogeneity (Červený, 2001...
2024
Four-component dipole shear-wave reflection imaging in high-angle wells
S. Q. Li, X. M. Zhang, C. X. Zhuang, Q. Wang, H. L. Xiao, X. M. Tang
International Meeting for Applied Geoscience and Energy (IMAGE)
...Four-component dipole shear-wave reflection imaging in high-angle wells S. Q. Li, X. M. Zhang, C. X. Zhuang, Q. Wang, H. L. Xiao, X. M. Tang Four...
2024
A Semi-analytical Solution of the Induced Stress Change in a Layered Reservoir Based on the Stress Formulation
Shihao Wang, Yanbin Zhang, Ouassim Khebzegga, Bin Wang, Zhe Liu, Xian-Huan Wen
Unconventional Resources Technology Conference (URTEC)
... rocks. We apply Fourier’s transform to the governing hydromechanical equation and enforce continuity conditions on the interfaces between neighboring...
2022
EXTENDED ABSTRACT: Lateral numerical dispersion with wave equation migration II
Wen-Jing Wu
CSPG Special Publications
...EXTENDED ABSTRACT: Lateral numerical dispersion with wave equation migration II Wen-Jing Wu 1998 248 251...
1998
Quartz Grain Orientations--1 (The Photometric Method)
R. F. Sippel
Journal of Sedimentary Research (SEPM)
... of the extraordinary wave can be readily calculated directly from the indicatrix in a direction normal to incidence. The equation of the indicatrix is [X2]/[2] + [Z2...
1971