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The AAPG/Datapages Combined Publications Database
Showing 1,445 Results. Searched 200,756 documents.
Upper Devonian Calcispheres From Redwater and South Sturgeon Lake Reefs, Alberta, Canada
R. J. Stanton, Jr.
CSPG Bulletin
... except for the presence in A. pulchra of an outer layer covering the canaliculate rays of the wall. Our specimens more closely resemble...
1963
The Ichnological Aspects of a Pennsylvanian Outcrop Occurring on the Muddy Boggy Creek Near Ada, Oklahoma
Douglas M. Schulte, R. L. Neman, Ph.D.
Oklahoma City Geological Society
... diameter of ten to fourteen centimeters, with the diameter of the individual rays measuring an average of five centimeters. The exact classification...
1994
The Application of Gamma Ray Spectralog Analysis to a Study of Chase Group Strata in Stevens County, Southwestern Kansas
M.O. Almouslli, P.G. Sutterlin
Oklahoma City Geological Society
...., 1968, Stratigraphic succession in Kansas: Kansas Geol. Survey Bull. 189, 81 p. End_of_Record - Last_Page 318------- Gamma rays are one...
1994
Traveltime tomography and efficient physics-informed Bayesian inversion
Tian Qiao, George Turkiyah, Gerard T. Schuster
International Meeting for Applied Geoscience and Energy (IMAGE)
... showing red transmission rays and traces with direct waves. a) VSP common shot gather from a field experiment, b) picked traveltimes of direct arrivals...
2022
Characterization of cm-Scale Heterogeneities in a Tight Oil Reservoir Using X-ray Computed Tomography, Profile Permeability Measurements and 3-D Image Analysis
Nisael A. Solano, Federico F. Krause, Chris R. Clarkson
Unconventional Resources Technology Conference (URTEC)
... traces. In order to generate these tomographic slices, the sample is irradiated with an x-rays beam of intensity Io, and the intensities of the attenuated...
2014
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)
... from tracing rays in a depth-velocity model. This elastic depth model is developed by iterative update of P-wave and S-wave velocities that optimally...
2022
Dip Data Estimation From a Multi Depth Investigation Array Induction Tool for Improved Structural Analysis
Ade Setiawan, Samira Ahmad, Udit Kumar Guru
Indonesian Petroleum Association
... detectors measurement help in providing borehole compensated density. High-energy gamma rays are emitted from the source into the formation. They undergo...
2011
Evaluation of Oil and Gas of the Caspian
Ya. P. Malovitskiy
Petroleum Geology: A Digest of Russian Literature
...-like toward the interior of the depression; further, the outer rays of this “fan” belong to anticlinal zones of the border frame and the inner rays...
1964
Evaluation of shales of the Belaga Formation in Central Sarawak, Malaysia, using the Spectral Gamma Ray method
Maame Adwoa Maisie, Ahmed Mohamed Ahmed Salim, Hassan M. Baioumy, Jasmi bin Ab Talib
Geological Society of Malaysia (GSM)
... instrumentation such as the Spectral Gamma Rays (SGR) detector has gained acceptance in the global energy industry as an important non-destructive...
2019
Finite-difference wavefield propagation using superstepping
T. Nemeth, K. Nihei, A. Loddoch, A. Sekar, K. Bube, J. Washbourne, L. Decker, S Kaplan, Ch. Wu, A. Shabelansky, O. Cristea, Z. Yin
International Meeting for Applied Geoscience and Energy (IMAGE)
...chine learning methods. Green’s functions can also be used for approximations of the full wave equations, such as rays, dynamic rays, or other simpler geom...
2024
Application of micro-XRF to characterise diamond drill-core from lithium-caesium-tantalum pegmatites
Naomi Potter, Nigel Brand
Petroleum Exploration Society of Australia (PESA)
... for micro-XRF has been focusing the X-ray beams, which had been limited to specialist synchrotron facilities where the high flux of X-rays and collimator...
2019
Optimization method of geometry and application based on Fresnel Gaussian beam forward modeling
Yang Jing, Yu Fuwen, Xu Xiaokun, Lv Shuang, Wang Xiangqian
International Meeting for Applied Geoscience and Energy (IMAGE)
... migration. (7) I , J represents the number of discrete rays inclination and azimuth angles, and , In the formula, in the represents the interval...
2024
Depositional Environments of Wilcox Lignites in Choctaw and Winston Counties, Mississippi
Darren S. Dueitt , Franz Froelicher , Samuel W. Rosso
GCAGS Transactions
... undergone extensive delignification. The crossfield pitting of the vascular rays, pitting characteristics of the axial tracheids, ray widths...
1985
Improvements on airborne gamma-ray spectrometry inversion
Jessica D. Weihermann, Yaoguo Li, Saulo P. Oliveira, Francisco J. F. Ferreira, Adalene M. Silva
International Meeting for Applied Geoscience and Energy (IMAGE)
... radioactivity in the form of gamma-rays in rocks and weathered materials up to 30- to 45-cm depth, and the main sources of gamma radiation are derived from...
2024
Degradation of Plant Tissues in Organic Sediments
Elso S. Barghoorn
Journal of Sedimentary Research (SEPM)
... of Brandon, Vermont. Note differences in the extent of structural deformation between the prosenchymatous wood elements and the cells of the rays...
1952
Was Decay Important in Origin of Coal?
James M. Schopf
Journal of Sedimentary Research (SEPM)
... rays, in particular, are known to be cellulosic. In many instances the wood rays are beautifully outlined in specimens of coalified wood and, although...
1952
The Late Early Miocene Sabine River
Earl Manning
GCAGS Transactions
... Gem and Mineral Society (1):57 p., 6 pls. Lauginiger, E. M. and E. F. Hartstein, 1983. A guide to fossil sharks, skates, and rays from the Chesapeake...
1990
The Origin of Calcareous Ooliths
P. H. Monaghan, Melba L. Lytle
Journal of Sedimentary Research (SEPM)
... under the polarizing microscope and with X-rays. Table 2 contains the results of these experiments. These experiments showed that if the concentration...
1956
Three-Dimensional Shape Analysis of Fine-Grained Sediments
Alan E. Wright
Journal of Sedimentary Research (SEPM)
... 20-30 microns in diameter. The slide is then put into the shadowing chamber so that the glancing angle of the rays from the source is about 20...
1957
Bubble Characteristics in Gassy Sediments
Thomas H. Orsi, Aubrey L. Anderson
GCAGS Transactions
... CT on the field of diagnostic radiology is believed by many to be surpassed only by the initial discovery of X-rays by Rontgen in 1895 (Oldendorf, 1980...
1994
Partial Immersion Technique for the Photography of Sand Grain Surfaces
George R. Fournier
Journal of Sedimentary Research (SEPM)
... of nonparallel polarized rays. The use of transmitted light was considered next but several obstacles were encountered. Regardless of size a sand grain...
1964
Use of Logging in Uranium Prospecting
William K. Hawkins, Marvin Gearhart
Wyoming Geological Association
... resolving time. Since uranium ore emits gamma rays at a random rate, the detector will also have random pulse distribution. If two or more particles...
1968
A Principal Component Analysis Approach to Understanding Relationships Between Elemental Geochemistry Data and Deposition, Niobrara Formation, Denver Basin, CO
Rana Elghonimy, Steve Sonnenberg
Unconventional Resources Technology Conference (URTEC)
... a handheld XRF analyzer that emits high energy x-rays that excite individual atoms to emit X-ray photons of a characteristic energy or wavelength...
2021
Improvements in Logging Operations and Analysis with a Customized NMR Unconventional Acquisition Mode in the Permian Basin
Mohammad Azeem Chohan, Katerina Yared
Unconventional Resources Technology Conference (URTEC)
... and capture gamma rays. The resulting gamma rays are distributed into channels to obtain elemental yields that are converted into elemental formation...
2023
Impacts of Tropical Systems on the Sedimentary Fabric of the Mississippi Sound
Brian M. Velardo, Samuel J. Bentley, Gregory W. Stone
GCAGS Transactions
... using a portable veterinary X-ray unit. X-rays were then digitized for analysis of sedimentary structures. Gravity Cores Gravity cores were analyzed...
2003