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The AAPG/Datapages Combined Publications Database

Showing 73,077 Results. Searched 200,293 documents.

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Sequential restoration and unstraining of structural cross sections: Applications to extensional terranes: Discussion

John Wickham, George Moeckel

AAPG Bulletin

... strain matrices are referred to different coordinate systems (Biot, 1965, p. 6-15): U is referred to the Eulerian, rotated coordinate system and V...

2002

Geodetic Datums and Map Projections

James G. Morgan

Houston Geological Society Bulletin

.... The Reference Ellipsoid To fix (or locate) a point in three-dimensional space, it is necessary to define a coordinate system. For locating points on or near...

1988

Alternative Strategies for Modelling Complex Structures

Stephen Tyson

Indonesian Petroleum Association

... that can be modelled using geocellular techniques. The new system incorporates significantly more geological and stratigraphic information than before...

2008

Q-compensation imaging of anisotropic viscous quasi-acoustic media along wavefield propagation path

Bohan Zhang, Huazhong Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

... in anisotropic absorption attenuation media are relatively cumbersome. In this paper, the 15-degree equation in the ray-centered coordinate system of VTI...

2022

A Pressure Transient Technique for Monitoring Waterfloods

Jeff Spath

Indonesian Petroleum Association

... is illustrated below in Figure 2. Figure 2. Relationship between elliptical and rectangular coordinate Using Eqns. 3 and 4, Eqns. 1 and 2 become...

2000

Fast Marching Method Based Rapid Simulation Accounting for Gravity

Tsubasa Onishi, Atsushi Iino, Hye Young Jung, Akhil Datta-Gupta

Unconventional Resources Technology Conference (URTEC)

... into 1-D problems using the DTOF as a spatial coordinate, assuming that gravity segregation is negligible in the ultra-tight matrix domain. The hydraulic...

2019

A Simple Photogrammetric Method to Improve Quantitative Image Analysis in Geoscience Research: RESEARCH METHODS PAPERS

Jesus E. Caracuel, Javier Cardenal, Jorge Delgado-Garcia, Santiago Garcia-Lopez

Journal of Sedimentary Research (SEPM)

... in the frame of the photogrammetric cameras), and analytical coordinate transformation between measured image (pixel coordinates; u, v system in Figure 1...

2000

Well Locations and Mapping Considerations

F. Kenneth Aitken

Houston Geological Society Bulletin

... is governed by what was used for earlier maps in the same region. State Plane Coordinate System The State Plane Coordinate System is not a projection...

1994

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

... on a Cartesian coordinate system with a simple first order finite difference scheme and therefore, it can not only improve accuracy but can also retain...

2014

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

... solution to the eikonal equation formulated in a ray coordinate system. Because it shares the information between rays, unlike ray tracing where...

2014

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)

... near borehole structures from the borehole coordinates into the earth coordinates system using the following methods and procedures. where...

2024

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)

... irregular free-surface, and then derive the firstorder velocity-stress elastic wave equations in a curvilinear coordinate system by discretizing the model...

2023

Abstract: AVAZ Inversion for Fracture Orientation and Intensity: a Physical Modeling Study; #90187 (2014)

Faranak Mahmoudian and Gary F. Margrave

Search and Discovery.com

... with the fracture system. Let call the coordinate system aligned with the fracture system the (y1 , y2 ), then every point of the gradient ellipse...

2014

Abstract: Mineral exploration targeting using AutoCAD as a geographic information system

S. McLaren, P. Tallman

Atlantic Geology

...Abstract: Mineral exploration targeting using AutoCAD as a geographic information system S. McLaren, P. Tallman An.ANTIC GEOLOGY 123 Mineral...

1995

Modeling Anisotropy in Computer Mapping of Geologic Data: Chapter 7

Gregory Kushnir, Jeffrey M. Yarus

AAPG Special Volumes

... a procedure called Regional Anisotropic Data Mapping (RADM). The concept behind this procedure is to create a temporary coordinate system (space...

1992

ABSTRACT: Geodatabase of the South Texas Uranium District

Beaman, Mark and McGee, William Wade

GCAGS Transactions

... geology question can be resolved through the spatial analysis using a Geographic Information System (GIS). The compilation of past and present...

2002

First-arrival traveltime and slope tomography in tilted anisotropic media with undulant topography

Xiaole Zhou, Serge Sambolian, Gaoshan Guo, Stephane Operto, Haiqiang Lan, Ling Chen

International Meeting for Applied Geoscience and Energy (IMAGE)

... of positioning point sources and extracting traveltimes and slopes at arbitrary positions in the curvilinear coordinate system with Kaiser-windowed sinc...

2022

Graphical Method for Calculating Dip and Strike from Continuous Dipmeters

B. Osborne Prescott

Tulsa Geological Society

... the values read on the outer edge of the polar coordinate chart for the correction azimuth, using positive values (0° to 180°) from S through W to N, and boxed...

1955

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