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The AAPG/Datapages Combined Publications Database
Showing 37 Results. Searched 196,371 documents.
Fermat’s Principle Raypaths in 3D Anisotropic Media
Bill Vetter
CSPG Special Publications
...Fermat’s Principle Raypaths in 3D Anisotropic Media Bill Vetter 1998 23 24...
1998
Finite Difference Modelling: Part IV
Lasse Amundsen, Ørjan Pedersen, Martin Landrø
GEO ExPro Magazine
... of the modern theory of numbers. In optics, Fermat’s principle, or the principle of least time, enunciated in 1658, is the principle that the path...
2019
The Application of a Linear Increase of Velocity with Depth to Seismic Dip Migration
J. E. Stones
Oklahoma City Geological Society
... is based on this assumption. According to Fermat's Principle a ray reaching a given point from a given source follows a minimum time path. Snell's Law...
1958
Abstract: Regime Rays: Visualizing the Fermat/Snell Loci in Homogeneous Anisotropic Media; #90171 (2013)
William J. Vetter
Search and Discovery.com
... wavelength/compositesrepetition-thickness ratio (e.g. Macbeth 2002). I suggest that Fermat’s principle and Snell’s law should apply in such composites...
2013
Anisotropy Kinematics Clarified through Regime Rrays Model
William J. Vetter
Search and Discovery.com
... channels (c.f. Cerveny 2001 p.28-30, p.103). They are (1) not traveltimes minimizing Fermat’s principle loci, (2) not pointwise Snell’s law conforming...
Unknown
Anisotropy Kinematics Clarified through Regime Rrays Model
William J. Vetter
Search and Discovery.com
... channels (c.f. Cerveny 2001 p.28-30, p.103). They are (1) not traveltimes minimizing Fermat’s principle loci, (2) not pointwise Snell’s law conforming...
Unknown
Flow Simulation of Complex Fracture Systems With Unstructured Grids Using the Fast Marching Method
Changdong Yang, Xu Xue, Michael J. King, Akhil Datta-Gupta
Unconventional Resources Technology Conference (URTEC)
... grids with two types of discretization, which are based on Fermat’s principle and Eulerian discretization. The accuracy and convergence...
2017
Chart Migrations
Frank A. Roberts
Oklahoma City Geological Society
..., depth and offset of reflecting horizons. The construction of the graph must include: Fermat's fundamental principle of seismology which is that a wave...
1958
Abstracts: Synthetic Microseismic Files; #90173 (2015)
J. Wong, P. M. Manning, L. Han, and J. B. Bancroft
Search and Discovery.com
... location using nonlinear optimization: CREWES Research Report, 21, 73.1-73.14. Wong, J., 2010. Fermat’s principle and ray tracing through anisotropic...
2015
Application of Traveltime Tomography and Kirchhoff Migration Methods to Improve the Seismic Cross-Section Resolution on 2D Land Seismic Data
Harmita Lestari, Nur Ayu Anas, Muh. Resky Ariansyah, Sabrianto Aswad, Heri Winarto
Indonesian Petroleum Association
.... Basic legal principles include Snellius’s Law, Huygens’s Principle, and Fermat’s Principle (Shearer, 2009). * ** Bolt (1976), mechanical waves...
2019
Abstract: Successful Imaging Below Salt: Technique and 2 Case Histories, by R. Marschall, H.-J. Zoch, C. Henke, M. Krieger, and F. Kockel; #90923 (1999)
Search and Discovery.com
1999
Dip and Azimuth Determination in 3D CRS-Stack
A. Hendriyana, M. Jaya, R. Sule, A.D. Guntara
Indonesian Petroleum Association
... properties along the raypath between source and receiver according to Fermat’s principle in ray theory. In contrast, CRS stacking operation...
2013
Subsurface Characterizaton Using Microseismic Velocity, Attenuation, and Ansiotrophy Tomography in a Geothermal Field
Ahmad Syahputra, Andri Dian Nugraha, Rachmat Sule, Sri Widiyantoro
Indonesian Petroleum Association
... bending is an approach in minimization of travel time base on Fermat’s Principle by applying small perturbations gradually on ray paths. Delay time...
2014
Abstract: Predicting Free Surface Multiples without the Water: SRME on Land; #90224 (2015)
Keith Wilkinson, Richard Bale, and Ken Gray
Search and Discovery.com
... is applied, and Fermat’s principle (stationary phase) results in the true DRP being reconstructed. The set of traces which constitute cross-convolved...
2015
The Limitations of Seismic Modelling of Geological Structures
B. L. N. Kennett
Petroleum Exploration Society of Australia (PESA)
... while bouncing them off a specified reflector. This is not a trivial computational task, but can sometimes be simp• lified by the use of Fermat's...
1985
High Resolution Diffraction Imaging of Small Scale Fractures in Shale and Carbonate Reservoirs
Alexander M. Popovici, Ioan Sturzu, Tijmen J. Moser
Unconventional Resources Technology Conference (URTEC)
....” By Huygens’ principle a reflector can be represented by a series of point diffractors that are positioned on its surface. In the second category...
2015
Implementation of the DIPSCAN Method to Estimate Boundary Dips in Complicated Structures by VSP Data
A. A. Tabakov, V.N.Ferentsi, H. Gravini
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
...) and velocity model of media in a vicinity Ω are known. From Fermat’s principle follows, that the ray is propagated from source point S to receiver point M...
2006
Application of finite difference eikonal solver for traveltime computation in forward modeling and migration
Amir Mustaqim Majdi, Seyed Yaser Moussavi Alashloo, Nik Nur Anis Amalina Nik Mohd Hassan, Abdul Rahim Md Arshad, Abdul Halim Abdul Latiff
Geological Society of Malaysia (GSM)
... of the wave traveling like a ray through the shortest path (Fermat’s principle) in the model and change direction when encountering velocity and density...
2021
Diving wave tomography: Velocity modelling using first arrival traveltime
Amatul Syafi Abdul Basit, Abdul Rahim Md Arshad, Arulini Permalu
Geological Society of Malaysia (GSM)
... analysis of rock physics. In this paper, we focus on tomography and its working principle on near-surface velocity modelling. We restricted our workflow...
2022
Limitations of Reflection Seismograph
L. E. Nugent, Jr.
AAPG Bulletin
..., seismic media are often considered isotropic and homogeneous for convenience in theoretical considerations. Thus, Huygen's principle, which states...
1953
Critical Analysis of Stack Seismic Systems
L. E. Nugent, Jr.
AAPG Bulletin
... of Huygen and Fermat concerning wave advancement and minimum time paths, and Snell's law on refraction and reflection. Figure 2 has the same field...
1967
Introduccion al Estudio de la Exploracion Sismologica (IN SPANISH), Introduction to The Study of Seismology Exploration
D. W. Rockwell
Boletín de la Asociación Mexicana de Geólogos Petroleros (AMGP)
... viajado por la ruta más rápida, pero esto es, en efecto, lo que mantiene el Principio de Fermât. Se verá posteriormente que tanto la ley de reflexión como...
1952
Dealing with Risk and Uncertainty in Exploration: How Can We Improve?
Peter R. Rose
AAPG Bulletin
... WITH RISK Expected Value and Risk Aversion The concept of expected value, apparently originated in 1654 by the French mathematicians Fermat and Pascal...
1987
Chapter 10: Earthquake, Tomographic, Seismic Reflection, and Gravity Evidence for a Shallowly Dipping Subduction Zone beneath the Caribbean Margin of Northwestern Colombia
Rocio Bernal-Olaya, Paul Mann, Carlos A. Vargas
AAPG Special Volumes
... were used to improve the regional velocity model. Ray paths from each source to the receiver are then traced by applying Fermat’s principle to find...
2015
Designing Coal-Bed Methane Seismic Acquisition Survey Parameters Using Finite Difference Modeling
Abdul Haris, Befriko Murdianto, Adriansyah
Indonesian Petroleum Association
..., for example, ray tracing which suffers in complex media due to its reliance on Fermat first arrival. The unique properties of the CBM reservoir, which...
2009