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The AAPG/Datapages Combined Publications Database
Showing 20,604 Results. Searched 200,357 documents.
Ultrasound reverse time migration for human brain imaging
Ting Li, Bo Feng, Yang Zhou, Rongwei Xu, Huazhong Wang
International Meeting for Applied Geoscience and Energy (IMAGE)
...-order acoustic wave equation can be written as: 2P 2P 2P = v 2 2 + 2 +f , (1) 2 t z x where P is the pressure, v is the velocity...
2024
Mapping Distribution of Sandstone and Seismic Multi-Attribute Analysis Using Linear Regression Method in the "RMS" Field, South Sumatra Basin
Clara Armiliany, Ryan Mulyadi Saragih, Aji Arif Sulaksono, Bagus Sapto Mulyatno, Ordas Dewanto
Indonesian Petroleum Association
... be indicated by the equation of the number of linear weights. P = w0+w1A1+...+wmAm (2) Where : wi = weight value of m + 1, where 1 = 0, ..., m The changed...
2019
TTI Wave Equation Migration by Phase-Shift Plus Interpolation
Richard A. Bale
Search and Discovery.com
... greater effort are expected from the use of wave-equation migration methods on TTI data. In contrast to ray-tracing based methods, wave-equation migration...
Unknown
TTI Wave Equation Migration by Phase-Shift Plus Interpolation
Richard A. Bale
Search and Discovery.com
... greater effort are expected from the use of wave-equation migration methods on TTI data. In contrast to ray-tracing based methods, wave-equation migration...
Unknown
Determination of Depth Models Through Self-Consistent Structural Modeling to Help Delineate Hydrocarbon Traps in the Uinta Basin
Alvin K. Benson
Utah Geological Association
... at the surface is to use ray tracing which represents an approximate solution to the wave equation. Starting at the bottom of the velocity model, raypaths...
1992
Upper Crustal Structure Derived from Seismic Refraction Experiments: Grand Banks of Eastern Canada
I. Reid, C.E. Keen
CSPG Bulletin
... displayed at a reduced velocity of 4.5 rather than 6 km/s. Static corrections have been applied to the travel times for variations in depth...
1988
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
... the diagonal direction, we find that, if we put the local wavefront coordinate coincident with the diagonal, then equation (2a) is equivalent to ray tracing...
2014
Abstract: Estimation of the Quality Factor with Tomography Using the Complex Eikonal Equation; #90255 (2017)
Tatiana Espinosa, Carlos Piedrahita Escobar
Search and Discovery.com
... or fractured media. To achieve an estimate of Q, initially, a complex eikonal equation is solved in a viscoelastic medium using ray tracing...
2017
Refraction Statics, A Comparison Among Processing Contractors
Bambang Sudewo
Indonesian Petroleum Association
.... They affect velocity analysis, reflection continuity, resolution and apparent structure. When statics supplied from the field are inadequate...
1985
Machine Learning Application for Shear Velocity Prediction in Ahnet Basin, Algeria; #42584 (2023)
Abdeldjalil Latrach, Nassim Bouabdallah, and Aimene Aihar
Search and Discovery.com
...Machine Learning Application for Shear Velocity Prediction in Ahnet Basin, Algeria; #42584 (2023) Abdeldjalil Latrach, Nassim Bouabdallah, and Aimene...
2023
Abstract: Kirchhoff Prestack Time Migration with Angle Domain Common Image Gathers; #90174 (2014)
Jianhua Pan, Robert Tilson, Gerry Schlosser, and Elvis Floreani
Search and Discovery.com
... velocity migration procedure, and the image at any subsurface location is related only to the RMS velocity value at this location, the ray is actually...
2014
Gabor Depth Migration using a New Adaptive Partitioning Algorithm
Yongwang Ma
Search and Discovery.com
... Equation (6) relates the position error expected in a single depth step, d x , to a velocity error of dv . This formula can be used to build the desired...
Unknown
Gabor Depth Migration using a New Adaptive Partitioning Algorithm
Yongwang Ma
Search and Discovery.com
... Equation (6) relates the position error expected in a single depth step, d x , to a velocity error of dv . This formula can be used to build the desired...
Unknown
Cross-Borehole Tomography in Development Geology: Part 7. Geophysical Methods
J. H. Justice, M. E. Mathisen, J. R. Bulau, A. A. Vassiliou
AAPG Special Volumes
... of the energy through it. Algorithms based on ray tracing or some form of the wave equation are usually used. These algorithms solve a system...
1992
Wave-Formed Sedimentary StructuresA Conceptual Model
H. Edward Clifton
Special Publications of SEPM
... and relates directly to wave and water depth combinations Moreover the velocity parameters probably provide an adequate approx imation for a conceptual model...
1987
SONIC LOG APPLICATIONS - EASTERN VENEZUELA
W. F. Clarke
Asociación Venezolana de Geología, Minería y Petróleo (AVGMP)
... in Incremental-time. Thus, below a depth of 8000 feet porosity should be directly proportional to velocity. Another approach is the empiric equation...
1961
Abstract: Determination of Depth Models Through Self-Consistent Structural Modeling to Help Delineate Hydrocarbon Traps, by A. K. Benson; #90993 (1993).
Search and Discovery.com
1993
Exploration of Deepwater Regions Offshore India
Roberto Fainstein, Rajesh Kalra
International Meeting for Applied Geoscience and Energy (IMAGE)
... a travel time table to move the sample. The ray path can be non-symmetric even for a flat reflector (3D velocity model) Anisotropic prestack depth...
2021
A Novel Method of Deriving Weathering Statics from First Arrival Refractions
G. W. Hollingshead, R. R. Slater
Pacific Section of AAPG
... procedure. Maintaining a constant set of offset distances also helps to alleviate problems arising from curvilinear ray paths where the velocity...
1980
Basin-Scale Rock Physics Study and Stochastic AVO Modelling for the Deep Water Kutei Basin (East Kalimantan Indonesia)
Gabriela Carrasquero, Alessandro Amato del Monte, Fabio Luoni, Paolo Battini, Gilbert Del Molino, Fabri Ikhlas Gumulya, Dedy Sulistiyo Purnomo, Nasif Khifni
Indonesian Petroleum Association
...). The statistical relationship used to establish the variation of velocity and density with depth was linear, given that it represents a simple yet...
2014
Eikonal equation-based adjoint-state characteristic reflection traveltime tomography: Method and application in real dataset
Jianming Zhang, Liangguo Dong, Jianhua Wang, Yilin Wang, Chao Huang
International Meeting for Applied Geoscience and Energy (IMAGE)
... by the fast kinematic imaging method based on the Eikonal equation. The alternate updates of reflector depth and velocity in ASCRT are more adaptable...
2023
Abstract: Automatic High-Density Constrained Velocity Picking; #90211 (2015)
Emil Blias
Search and Discovery.com
.... A velocity model, beyond its initial purpose to obtain a seismic stack, is used for time and depth imaging, AVO analysis and inversion, pore pressure...
2015
Seismic expressions of a Miocene prograding carbonate margin, Mut Basin, Turkey
Xavier Janson, Gregor P. Eberli, Florence Bonnaffe, Fabrice Gaumet, Vincent De Casanove
AAPG Bulletin
... for building the ray-tracing impedance model (Figure 7).Figure 7. Velocity model in depth used for ray-tracing methods. This section follows the projection...
2007
Integration of geology, rock physics, logs, and prestack seismic data for reservoir porosity estimation
Abdulaziz M. AlMuhaidib, Mrinal K. Sen, M. Nafi Toksoz
AAPG Bulletin
... average equation curve (Wyllie et al., 1956). Velocity ranges up to 2500 m/s (8202 ft/s) for a given porosity, and porosity may range from 10 to 40...
2012
Abstract: Basin-Level First Arrival Tomographic Inversion Near-Surface Modeling and Key Technologies; #91210 (2025)
Liansheng Liu, Chunlan Xing
Search and Discovery.com
... to the use of all seismic data, micro-logging, and small refraction data from the entire exploration area to construct a unified near-surface velocity model...
2025