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Welcome to the new Datapages Archives

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The AAPG/Datapages Combined Publications Database

Showing 18,659 Results. Searched 189,230 documents.

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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

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

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

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

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

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

-- 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

Abstract: Regular Grids Travel Time Calculation … A Practical Huygens Wavefront Expansion Approach; #90187 (2014)

Zhengsheng Yao, Mike Galbraith, and Randy Kolesar

Search and Discovery.com

... on a wave propagation wavefront and that they satisfy Assuming that points ( (1) where x and z are spatial coordinates, is the traveltime (eikonal...

2014

Optimization of Wave Parameters in the "a-b-c- ..." Model

R. Craig Starns , Robert C. Glassen

GCAGS Transactions

... ratio exceeds 0.78, the longshore component of wave power is computed at the breaker point using the equation from Komar 1971: PL =2ECSin2 where E =H 2/8...

1975

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

The Attenuation Effects of Surface-Wave Propagations on Rockmass Using SASW Method

Suharsono, Abdul Rahim Samsudin

Geological Society of Malaysia (GSM)

..., the methods utilize only Rayleigh waves. The Rayleigh waves will propagate radially outwards along a cylindrical wave front. The vertical ground displacement...

2003

Abstract: Regime Rays: Visualizing the Fermat/Snell Loci in Homogeneous Anisotropic Media; #90171 (2013)

William J. Vetter

Search and Discovery.com

...) in spherical coordinates (θ, φ )], together with the pathtime minimizing derivatives re (θ, φ ). The below equation 2 is its columnvectored form, after re...

2013

Optical Methods and Equipment for Processing Geophysical Data: ABSTRACT

Arthur L. Ingalls

AAPG Bulletin

.... The equations involved may be in either X, Y coordinates or R, ^Thgr coordinates, whichever lends itself to the best mathematical analysis. LaserScan...

1965

Abstract: The Phase Shift Time Stepping Equation and the Marmousi Data Set; #90171 (2013)

Ben D. Wards, Gary F. Margrave, and Michael P. Lamoureux

Search and Discovery.com

... that does not use finite differences. An analytical solution to the acoustic wave equation (Etgen, 1989; Tal-Ezer, 1986) is computed exactly...

2013

Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method

Tianfei Zhu

Search and Discovery.com

... Consider the wave equation in the frequency domain: ’2 <  Z2 V 2 (x ) < 0. (1) ART seeks an approximate solution to the wave equation in the form...

Unknown

Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method

Tianfei Zhu

Search and Discovery.com

... Consider the wave equation in the frequency domain: ’2 <  Z2 V 2 (x ) < 0. (1) ART seeks an approximate solution to the wave equation in the form...

Unknown

Abstract: Spherical-Wave AVO Modelling in VTI Media; #90211 (2015)

Arnim Haase and Charles Ursenbach

Search and Discovery.com

...Abstract: Spherical-Wave AVO Modelling in VTI Media; #90211 (2015) Arnim Haase and Charles Ursenbach Datapages/Search and Discovery Article #90211...

2015

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