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The AAPG/Datapages Combined Publications Database
Showing 3,218 Results. Searched 200,619 documents.
Modeling consolidated sandstones with dispersed clay
J. Gallop, L. Vernik, F. Contreras, J.-G. Restrepo, S. Blanco, G. Alvarez
International Meeting for Applied Geoscience and Energy (IMAGE)
... calibration. Equations 3 and 4 are V-K dry rock P-wave and shear moduli respectively, where 0 is the zero-stress crack density, the pore shape factors...
2023
Petroleum and Gas Occurrences and Development History in Box Elder County, Utah
J. Wallace Gwynn
Utah Geological Association
... spherical or tubular masses 1 to 2 inches in length, and of threads and hairs 6 to 8 inches in length (figures 4a and b). These small masses spot...
2006
Destructive vs Non-destructive: Establishing an Empirical Relationship between Impulse Hammer and Triaxial Test - Derived Rock Mechanical Properties
Maaruf Hussain, Arqam Muqtadir, Abduljamiu Amao, Khalid Al-Ramadan, Lamidi Babalola
Unconventional Resources Technology Conference (URTEC)
... acquired by performing triaxial tests on rock samples to obtain the static moduli (Es and Poisson’s ratio (vs)) and the P and S wave velocities (Vp and Vs...
2019
Unsupervised Machine Learning Applications for Seismic Facies Classification
Satinder Chopra, Kurt J. Marfurt
Unconventional Resources Technology Conference (URTEC)
... log information, using gamma ray and resistivity responses not measured by surface seismic data, along with P-wave, S-wave, and density logs...
2019
Dolomitized Glauconite Granules: A New Kind of Peloid From Proterozoic Strata of Central India
Ajit Bhattacharyya, S. K. Chanda, Gerald M. Friedman
Journal of Sedimentary Research (SEPM)
..., fine sandstone is sharp. The sandstone, wave-laminated and cross-bedded throughout, is in turn succeeded by the main Tirohan Dolomite and the Kaimur...
1986
The Effect of Gravitational Compaction on the Structure of Sedimentary Rocks
Hollis D. Hedberg
AAPG Bulletin
... of uniformity. Theoretically, the size of grain should not affect porosity. A mathematical calculation shows that a sand of spherical grains 1 mm...
1926
Chapter 8 - Mudrocks: Siltstones, Mudstones, Claystones & Shales
Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine
AAPG Special Volumes
..., intervening muddy beds are more strongly bioturbated. This unit was deposited on a storm-wave-dominated shelf with deltaic sediment input. PPL, Scale bar...
2014
Petrology of Carbonate Rocks
D. L. Baars
Four Corners Geological Society
... sediments are those that were transported to the depositional site by wave action, tidal currents, or similar modes of water movement: they are usually...
1963
From Arrhenius to CO2 Storage: Part III: A Simple Greenhouse Model
Martin Landrø, Lasse Amundsen
GEO ExPro Magazine
... not continuously reach each square meter of the Earth's spherical surface. As shown in the figure on the opposite page, the area of the Earth...
2019
Graphical Methods of Calculation in Interpretation in Work with the Torsion Balance: DISCUSSION
Donald C. Barton
AAPG Bulletin
... of symmetry, the sole advantage of the various methods making use of spherical or cylindrical coordinates is that one chart or a set of two charts is applicable...
1929
Comprehensive pressure core analysis for hydrate-bearing sediments from Gulf of Mexico Green Canyon Block 955, including assessments of geomechanical viscous behavior and nuclear magnetic resonance permeability
Jun Yoneda, Yusuke Jin, Michihiro Muraoka, Motoi Oshima, Kiyofumi Suzuki, William F. Waite, and Peter B. Flemings
AAPG Bulletin
...., 2019). In previous studies, PNATs were used to obtain x-ray computed tomography (CT) images (Jin et al., 2016), P and S wave velocities, gamma-ray bulk...
2022
Mechanics of Basin Evolution and Its Relation to the Habitat of Oil in the Basin: Topical Papers
K. F. Dallmus
AAPG Special Volumes
... and dimensions is obtained (Fig. 1c). The shape of the earth is an oblate spheroid. The departure from the spherical shape, a flattening at the poles...
1958
Recognition of a Transgressive Carbonate Sequence Within an Epeiric Sea: Helderberg Group (Lower Devonian) of New York State
Léo F. Laporte
Special Publications of SEPM
... a tidal flat lagoon environmcntal com The more or less hemi plcx Laporte 1967 spherical heads found as isolated specimens in lime mudstones are by contrast...
1969
Reef development in the Devonian of the eastern Rhenish Slate Mountains, Germany
Wolfgang Krebs
CSPG Special Publications
... wave-resistant structure in the sense of Lowenstam (1950). Beneath the zone of continuous wave action sedimentation of bank- and lens-like limestones...
1967
Reef development in the Devonian of the eastern Rhenish Slate Mountains, Germany
Wolfgang Krebs
CSPG Special Publications
... wave-resistant structure in the sense of Lowenstam (1950). Beneath the zone of continuous wave action sedimentation of bank- and lens-like limestones...
1967
The Development of Rodriguez Bank, a Holocene Mudbank in the Florida Reef Tract
R. J. Turmel, R. G. Swanson
Journal of Sedimentary Research (SEPM)
...), Rodriguez Bank is a Recent mound of unconsolidated calcareous sediments deposited during a relative rise in sea level in the absence of vigorous wave action...
1976
Seismic Characterization of the Fiordland Gas-hydrate Province, New Zealand
Miko Fohrmann, Andrew R. Gorman, Ingo A. Pecher
AAPG Special Volumes
..., New Zealand: Journal of Structural Geology, v. 19, no. 10, p. 13231342.Ostrander, W. J., 1984, Plane-wave reflection coefficients for gas sands...
2009
Hydromagnesite Stromatolites and Sediments in an Alkaline Lake, Salda Golu, Turkey
C. J. R. Braithwaite , Velsel Zedef
Journal of Sedimentary Research (SEPM)
...-derived. Although waves are smaller in a water body the size of Salda Golu, wave-driven transport can be rapid. Where sediments consist of contrasting...
1996
Lithofacies of the Devonian Marcellus Shale In the Eastern Appalachian Basin, U.S.A.
Kathy R. Bruner, Margaret Walker-Milani, Richard Smosna
Journal of Sedimentary Research (SEPM)
... remained above storm-wave base, the thermocline was intermittent being tied to a seasonal stratification–mixing cycle, the redox state of the benthic zone...
2015
Vertical Seismic Profiling--A Measurement that Transfers Geology to Geophysics: Chapter 2
B. A. Hardage
AAPG Special Volumes
... spherical divergence, such as dispersion, S-wave conversions, and scattering. One can establish the accuracy of amplitude processing near a VSP well...
1985
Root Calcretes and Uranium-Bearing Silcretes at Sedimentary Discontinuities In the Miocene of the Madrid Basin (Toledo, Spain)
M. Ángeles Bustillo, Chloé Plet, Ana M. Alonso-Zarza
Journal of Sedimentary Research (SEPM)
...-bearing silica zones were identified under short-wave UV light. Appropriate areas for analysis by Micro-Raman spectroscopy were selected by optical...
2013
Fractal analysis of tight shaly sandstones using nuclear magnetic resonance measurements
Jin Lai, Guiwen Wang, Zhuoying Fan, Zhenglong Zhou, Jing Chen, and Shuchen Wang
AAPG Bulletin
... sandstones. Assuming spherical pores, a new model to calculate the fractal dimension of pore structure from the NMR T2 distributions is proposed...
2018
Architecture and Permeability Structure of Fluvial-Deltaic Sandstones, Ferron Sandstone, East-Central Utah
Michael H. Gardner, Mark D. Barton, Noel Tyler, R. Stephen Fisher
Rocky Mountain Section (SEPM)
...-weather wave base. Mudstone interbeds provide evidence for suspension deposition during normal fair-weather conditions, whereas sandstone beds record...
1992
Dynamics and deposition of sediment-bearing multi-pulsed flows and geological implication
Viet Luan Ho, Robert M. Dorrell, Gareth M. Keevil, Robert E. Thomas, Alan D. Burns, Jaco H. Baas, William D. McCaffrey
Journal of Sedimentary Research (SEPM)
..., A., Vasile, M., Sefcik, J., and Mulholland, J., 2015, Estimation of particle size distribution and aspect ratio of non-spherical particles from chord length...
2019
Variations in Porosity and Permeability in the Wilcox Group of the Texas Upper Gulf Coast
E. L. Grubbs
GCAGS Transactions
... as to considerably reduce porosity. However, Payne (5) noted that more spherical shapes increased porosity as did more heterogeneous shapes. Tickell...
1953