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The AAPG/Datapages Combined Publications Database
Showing 23,315 Results. Searched 195,364 documents.
Uncertainty Analysis in Geological Surface Modeling
Search and Discovery.com
N/A
ABSTRACT: Distribution Patterns of Porosity and Permeability in the Hydrocarbon Bearing Sands of the Agbada Formation, Niger Delta Continental Shelf, Nigeria; #90108 (2010)
George A. Chiamogu and Olugbenga A. Ehinola
Search and Discovery.com
... rocks. Porosity ranges from 3.6% to 39.4%, a mean of 21.92%, standard deviation of 8.91. The horizontal permeability ranges from 0.08 to 9990...
2010
THE APPLICATION OF FACIES PARAMETERS AND MAPPING TECHNIQUES TO EXPLORATION OF THE SUBSURFACE LOWER CRETACEOUS OF THE QATTARA DEPRESSION, WESTERN DESERT EGYPT
Mohamed Hossny Elzarka
Journal of Petroleum Geology
..., relative centre of gravity, variance, covariance and relative standard deviation; and tripartite and entropy facies parameters have been calculated...
1984
Porosity, Permeability, and Pore Characterization of the Triassic Cumnock Formation: A Continuous Gas Assessment Unit, Sanford Sub-Basin, Deep River Basin, Lee County, North Carolina, USA
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Porosity, Permeability, Pore- and Geomechanical Characterization of the Triassic Cumnock Formation: A Lacustrine / Rift Continuous Gas Assessment Unit
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Borehole Image Based Aperture Characterization to Identify Primary Versus Secondary Fracture Opening
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First and Second Degree Regression Correlation of the Size Analysis Statistical Parameters of Trask, Inman, Folk and Ward, and Friedman: NOTES
W. D. Sevon
Journal of Sedimentary Research (SEPM)
... of calculation of mean and standard deviation (sorting) and only some correlation improvement by use of the second degree regression. FOLK, R. L...
1968
Application of Moments to Vertical Variability Maps of Stratigraphic Units
W. C. Krumbein , W. G. Libby
AAPG Bulletin
... cable to mean bed thickness and standard deviation of thickness, so that it can be applied either to position or magnitude of individual beds or zones...
1957
Recognition of a Relationship between Depth and Macroboring Distribution in Growth Framework Reef Cavities, Bonaire, Netherlands Antilles
David R. Kobluk, Miran Kozelj
CSPG Bulletin
... of boreholes with depth, and the standard deviation of the cross-sectional areas with depth. The regression of standard deviation on mean borehole...
1985
A Grain Size Analysis of Longshore-Bars and Troughs, Lake Superior, Ontario
John S. Mothersill
Journal of Sedimentary Research (SEPM)
... by a number of sedimentologists to determine whether parameters such as skewness, kurtosis, standard deviation, and grain size are related to depositional...
1969
Student Operator Error in Determination of Roundness, Sphericity, and Grain size
Robert L. Folk
Journal of Sedimentary Research (SEPM)
... of mean roundness and roundness standard deviation. Experimental error in determination of mean roundness from counts of fifty grains was ±0.35...
1955
A Profile of the Four Moment Measures Perpendicular to a Shore Line, South Haven, Michigan
William T. Fox, John W. Ladd, Michael K. Martin
Journal of Sedimentary Research (SEPM)
..., offshore bar, and offshore area to study the changes in the first four moments. The mean grain size and standard deviation reached a maximum in the plunge...
1966
Iterative Stochastic Calibration of Basin Scale Migration Models
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N/A
Textural Analysis with Texas Instruments 59 Programmable Calculator: RESEARCH-METHOD PAPER
D. Joe Benson
Journal of Sedimentary Research (SEPM)
... mean, standard deviation, skewness, and kurtosis. The program is written for use with Texas Instruments, T.I. 59 programmable calculator...
1981
A Critique of Methods for Comparing Heavy Mineral Suites
Edward J. Young
Journal of Sedimentary Research (SEPM)
...). If the formula for standard deviation, =
1966
ABSTRACT: A Comparison of Depth Conversion Methods in the Gulf of Mexico, by Melvan D. Carter, Gary R. Hyatt; #90999 (1990).
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1990
Practical Comparison of Methods of Computing Grain-Size Parameters: ABSTRACT
Donald E. Owen, Roy L. Ingram
AAPG Bulletin
... consistently were appreciably higher than moment standard deviation. Cadigan's S and Otto's and Inman's ^sgr^phgr produced irregular values averaging...
1969
Use of Dolostone Rhythmite Stratigraphy to Interpret Origin of Cross-Cutting and Manto Breccias Hosting a Lead-Zinc Deposit at Robb Lake, Northeastern British Columbia: ABSTRACT
F. T. Manns
AAPG Bulletin
... 2.8 m in thickness with a standard deviation of 1.8 m (N = 1,295). Poorly defined rhythmites in the highly brecciated lower half of the succession...
1982
Considering the Vertical Variation in Rock Mechanical Properties of a Lithologic Zone Using Laboratory Derived Data Is it Time for Geomechanical Stratigraphy?; #120191 (2015)
Douglas E. Wyatt, Jesse Hampton, Dandan Hu, Cheng Chen, Vladimir Martysevich
Search and Discovery.com
... be possible to map strata of approximately equal values of rock properties only looking to the values outside of the first standard deviation...
2015
Estimation of Recent Sediment Size Parameters from a Triangular Diagram
William J. Plumley, Donald H. Davis
Journal of Sedimentary Research (SEPM)
..., such as the mean and median, which are measures of the central tendency; the quartile deviation and standard deviation, which are measures of the sorting...
1956
A Visual Comparator for Degree of Sorting in Thin and Plane Sections: REPLY
James Harrell
Journal of Sedimentary Research (SEPM)
... of frequency was numbers of spheres in each size class. The standard deviation (or "sorting") of the diameters, for both the whole and randomly sectioned...
1985
Abstract: Late Cretaceous to Tertiary Thermal Evolution of the Southern Carpathians: Evidence from Apatite Fission Track Data, by A-V. Bojar, F. Neubauer, and H. Fritz; #90942 (1997).
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1997
Use and Misuses of the -Scale: DISCUSSION
J. W. Pierce, R. R. Graus
Journal of Sedimentary Research (SEPM)
....) End_Page 1348----------------------- when they are reported as a -mean and -standard deviation or as plotted histograms showing only a -scale...
1981
An Empirical Determination of the Minimum Number of Measurements to Estimate the Mean Random Vitrinite Reflectance of Disseminated Organic Matter, by M. Pawlewicz and C. Barker; #90986 (1994).
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1994
Textural Parameters: AN EVALUATION
R. J. Moiola, D. Weiser
Journal of Sedimentary Research (SEPM)
... between beach and inland dune sands and coastal dune sands; the combination of mean diameter vs. standard deviation is most effective in differentiating...
1968