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The AAPG/Datapages Combined Publications Database
Showing 20,604 Results. Searched 200,357 documents.
Seismic Reflections from a Lau Basin Magma Chamber
Janet L. Morton, Norman H. Sleep
Circum Pacific Council Publications
.... Depth migration is highly dependent on the input velocity model. As noted earlier, the interval velocity estimate of 4.8 km/s may be slightly too...
1985
Pore structure and fractal characteristics of Ordovician Majiagou carbonate reservoirs in Ordos Basin, China
Jin Lai, Song Wang, Guiwen Wang, Yujiang Shi, Taiping Zhao, Xiaojiao Pang, Xuechun Fan, Ziqiang Qin, and Xuqiang Fan
AAPG Bulletin
... image that reveals the interior of an object. Under a certain x-ray energy, the grayscales in such images reflect the relative linear x-ray attenuation...
2019
2D isotropic and vertical transversely isotropic RTM using SEG Hess VTI Model
Richa Rastogi, Abhishek Srivastava, Monika Gawade, Nithu Mangalath, Laxmaiah Bathula, Bhushan Mahajan, Suhas Phadke
International Meeting for Applied Geoscience and Energy (IMAGE)
... is acoustic velocity, p is acoustic pressure, t is time, U is dimensional parameter and us is shot location. Equation (1) is implemented using...
2022
Elastic Mechanical Properties from SEM Imaging in Tight Formations
Joel Walls, Jack Dvorkin, Gabriela Davalos
Unconventional Resources Technology Conference (URTEC)
.... These properties can be determined from sonic well logs, but the required logs (compressional and shear velocity) are not always available...
2019
Abstract: Fracture Detection Via Azimuthal Analysis of Seismic Data: Snake Oil or silver Bullet?; #90187 (2014)
Mike Perz, Peter Cary, Xinxiang Li, and Satinder Chopra
Search and Discovery.com
... azimuthal fracture detection techniques: P wave azimuthal velocity analysis (VVAZ), P wave azimuthal AVO analysis (AVAZ), and converted wave shear wave...
2014
Estimation of Seismic Attenuation (Q): More Insight from Zero-Offset VSP
Mohammad Risyad
Indonesian Petroleum Association
.... RESULT AND DISCUSSION Logarithmic ratio of amplitude at two different depth levels from equation (2) is a linear function and can be rewritten...
2018
A New Type of Reservoir Rock in Volcaniclastic Sequences (1)
LEV VERNIK
AAPG Bulletin
... of the effective stress s[v] is estimated. The calculation of (s[v]) on the assumption of its linear growth with depth according to the equation sigma[v] = S[v...
1990
Hierarchical elastic velocities reconstruction with Eikonal-equation-based characteristic reflection traveltime tomography
Jianhua Wang, Jianming Zhang, Liangguo Dong, Yandong Wang
International Meeting for Applied Geoscience and Energy (IMAGE)
...-wave ray tomography (Stopin and Ehinger, 2001) and stereotomography (Alerini et al., 2007) are two types of elastic velocity model-building methods...
2024
NMO Inversion for Multilayer Subsurface with Horizontal Transverse Isotropic layers
E. Blias
Search and Discovery.com
... is utilized to determine an explicit formula for azimuthally-dependent NMO velocity in a HTI layered media with depth-varying orientation...
Unknown
NMO Inversion for Multilayer Subsurface with Horizontal Transverse Isotropic layers
E. Blias
Search and Discovery.com
... is utilized to determine an explicit formula for azimuthally-dependent NMO velocity in a HTI layered media with depth-varying orientation...
Unknown
Subsalt pressure prediction in the Miocene Mad Dog field, Gulf of Mexico
Michael P. Merrell, Peter B. Flemings, Glenn L. Bowers
AAPG Bulletin
... and the deeper section.Figure 4. Pressure versus depth plot of the discovery well 826-1. The wireline gamma-ray, resistivity, and sonic logs (A, B, and C) and (E...
2014
Abstracts: Time-lapse Differential AVO: Reflection Coefficient at Fluid-fluid Boundary; #90173 (2015)
Jinfeng Ma
Search and Discovery.com
... is ray parameter, is P-wave velocity, is shear wave velocity and is densit y. is P-SV wave reflection angle. Rf(p) is the fluid-fluid reflection...
2015
Microseismic sensor placement optimization for rapid leakage alarm of geologic carbon storage
Yuan Zi, Lei Fan, Xuqing Wu, Jiefu Chen, Zhu Han
International Meeting for Applied Geoscience and Energy (IMAGE)
... velocity model using geological strata and historical seismic surveys. The simulation and optimization of this case study are conducted using the ray...
2023
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
Value of conventional PS-wave velocity analyses for PSDM of deep-water OBS data
James Gaiser, James Simmons, Moacyr de Souza Bezerra
International Meeting for Applied Geoscience and Energy (IMAGE)
... provides a valuable initial S-wave model of the shallow overburden for PS-wave PSDM. used to establish a depth velocity model to perform normal moveout...
2022
ABSTRACT: Porosity-Velocity Distribution in Stratigraphic Sequences: The Marion-Yin Model; #90013 (2003)
JUAN FLOREZ, GARY MAVKO
Search and Discovery.com
... of transitional facies changes from clean sand to pure clayey shale in the velocity-porosity plane varies from a linear trend at low confining pressure...
2003
Imaging challenges at Gulf of Papua (PNG) and their solutions through high-end imaging technology
Zongying Gong, Subhash Chandra, Xiaodong Wu, Yajing Li, Min Zhi, Michael Szczepaniak, Barry Hung
Petroleum Exploration Society of Australia (PESA)
...) is the state-of-art technology used to resolve velocity anomalies caused by shallow gas pockets. Supplemented by multilayer non-linear tomography, a high...
2019
Imaging in Complex Environments Common Reflection Angle Migration
Graham A. Winbow
Indonesian Petroleum Association
... amplitude or first arrival). Illumination is an issue because significant lateral velocity variation produces significant laterally varying ray...
2007
2010
Chapter 10-part 3: 3-D Depth Image Interpretation
William L. Abriel, Joseph P. Stefani, Robert D. Shank, David C. Bartel
AAPG Special Volumes
.... One very important concept that needs to be understood is the sensitivity of seismic imaging to variations in overlying earth velocity, and why depth...
2011
P-wave velocity inversion with average velocity analysis method
Yan Yuefeng, Jing Shaodong, Wang Yingwei, Zhong Chuhan
International Meeting for Applied Geoscience and Energy (IMAGE)
..., the application of P-wave velocity is more significant. It is shown that Poisson’s ratio is sensitive to the wavelength (W)/depth (D) relationship...
2024
Reflection or Refraction?
Aleksandr Nikitin, Nikolay Amelin, Sergei Pokrovskii, Andrey Lekomtsev
GEO ExPro Magazine
... such as ray bending, scattering, diffractions, interference by adjacent reflections in high velocity formations are typical for reflected wave CDP surveys...
2017
Tomographic waveform inversion (TWI) applied to real seismic data
Jlio Oliva Frigrio, Biondo Biondi
International Meeting for Applied Geoscience and Energy (IMAGE)
... = 0 . Moveout analysis of the CIGs shows that the migration velocity is too slow for the deeper strong events below 2.7 km depth. Conversely...
2022
Acquisition and Ananlysis of Wide-Angle Reflection and Refraction Seismic Data
Paul L. Stoffa
Circum Pacific Council Publications
... seismic coverage with expanded partial apertures is obtained along the seismic line. These seismic data will result in improved velocity-depth...
1989