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The AAPG/Datapages Combined Publications Database
Showing 800 Results. Searched 196,121 documents.
Textural and Shape Variation in the Berea Sandstone of Ohio
Fred Foreman, Harry L. Thomsen
Journal of Sedimentary Research (SEPM)
... were developed and from these the arithmetic mean, M, the standard deviation, , and the skewness, SK, were obtained. This is a standard method which...
1940
Submarine Geology of Cortes and Tanner Banks
J. E. Holzman
Journal of Sedimentary Research (SEPM)
...------------------------ and phi skewness of each sample was determined. The results of these analyses are listed in table III. Median diameters ranged from 1.17 mm...
1952
The Influence of Areal Trends on Correlations Between Sedimentary Properties
W. C. Krumbein, Thomas A. Jones
Journal of Sedimentary Research (SEPM)
... by simulation studies of areal patterns of variation and the population densities of mapped variables. JONES, T. A., 1969, Skewness and kurtosis...
1970
Understanding the Advantages and Disadvantages of Unconventional Well Stacking and Interference
Santiago Rivera, Yongduk Shin
Unconventional Resources Technology Conference (URTEC)
... as a fluid conduit for both of the vertically stacked wellbores (Figure 8, left). H2 was modeled applying different levels of skewness for the upper well...
2023
Paleogeographic Reconstructions from Cross-Bedding Studies
William F. Tanner
AAPG Bulletin
... of rivers on the coastal plain of Georgia. The skewness is slight, and the preferred direction is at right angles to the shoreline. Figure 3B shows similar...
1955
Application of Moments to Vertical Variability Maps of Stratigraphic Units
W. C. Krumbein , W. G. Libby
AAPG Bulletin
... of total interval thickness occupied by bulk of sand occurrences. End_Page 206------------------------------ skewness, which indicate whether...
1957
Reservoir Heterogeneities of Some Cretaceous Sandstones
Charles F. Dodge , Dennis P. Holler , Robert L. Meyer
AAPG Bulletin
... (standard deviation), skewness, and kurtosis. In addition, the C and M numbers for each sample were calculated from these data. The oriented bedding...
1971
Estimation of Single-Phase Permeability from Parameters of Particle-Size Distribution
Manmath N. Panda, Larry W. Lake
AAPG Bulletin
... medium, such as the mean, the variance, and the skewness of a psd. Such a method, when coupled with a sedimentological model, could partially explain...
1994
Deltaic Depositional Processes in a Glacier-Fed Lake: A Model for the Fluvial/Lacustrine Interface
Jim Bogen
Special Publications of SEPM
.... Skewness is plotted against mean diameter in Figure 14. The skewness indicates to what extent a grain size distribution deviates from the normal...
1987
Genesis of an Upper Cretaceous Offshore Bar Near Arlington, Texas
Charles F. Dodge
Journal of Sedimentary Research (SEPM)
... deviation and skewness (third moment) for 8 samples were calculated. The standard deviation varied from a low of 0.37 to a high of 0.73. If we...
1965
Reproducibility and Significance of Measurements of Sedimentary Size Distributions
John J. W. Rogers
Journal of Sedimentary Research (SEPM)
... deviation = 1 = [84 - 16]/[4] + [95 - 5]/[6.6] skewness = SkI = [16 + 84 - 250]/[2(84 - 16)] + [5 + 95 - 250]/[2(95 - 5)] kurtosis = KG = [95 - 5]/[2.44(75...
1965
Fluvial--Deltaic Facies of the Castlegate Sandstone (Cretaceous), East-Central Utah
Frederic R. Van De Graaff
Journal of Sedimentary Research (SEPM)
...-size analysis can be used to distinguish among some Holocene depositional environments. Scatter diagrams using mean, standard deviation, skewness...
1972
A Physical Model of Cementation and Its Effects on Single-Phase Permeability
Manmath N. Panda, Larry W. Lake
AAPG Bulletin
... size distribution (psd), such as the mean, standard deviation, and skewness, to estimate permeability. Only these three parameters of the psd...
1995
Lithofacies and Depositional Environments of the Lower Woodbine Formation
Ron Johnson
North Texas Geological Society
... around 0.36ϕ. According to Friedman, this would place most of the samples in the vary well to well-sorted category. Skewness values vary between −1.26...
1982
The Significance of Grain Size Distributions in Clastic Sedimentary Rocks
John J. W. Rogers
GCAGS Transactions
... probability paper, which shows deviations from lognormality even in some sediments for which standard quartile measurements indicate a skewness of 1. Non...
1958
Petrography and Lithology of the Lake Bonneville Sand and Gravel Deposits, Davis County, Utah
Richard S. Kopp
Utah Geological Association
... four moment measures; central tendency (mean size), dispersion (sorting), asymmetry (skewness), and peakedness (kurtosis). The petrographic analysis...
1987
Bottom Sediments of Green Lake, Wisconsin
W. H. Twenhofel, Dan E. Feray
Journal of Sedimentary Research (SEPM)
...------------------------- the three quartiles and coefficients of sorting and skewness. Few of the sands are well sorted and many are more poorly sorted than...
1945
Thin-section Mechanical Analysis of a Miocene Coquina from Salum, Egypt
Amin R. Gindy, Ismail Z. Sultan
Journal of Sedimentary Research (SEPM)
.... From t ese percentiles, statistical parameters of graphic mean size, standard deviation, skewness and kurtosis were calculated (Folk and Ward, 1957...
1978
The Properties of Bed Sediments in Pools and Riffles
Paul J. Hirsch , Athol D. Abrahams
Journal of Sedimentary Research (SEPM)
... were prepared for the 8 sediment samples, and the mean, standard deviation, skewness, and kurtosis (Fisher's g1 and g2) were computed for each...
1981
Application of Petrographic Image Analysis and Multivariate Statistical Techniques for Textural Studies of Oil Sand Samples, #80212 (2012)
Julie Dee Bell, Ovie Eruteya, Oko Oono
Search and Discovery.com
... deviation σ is approximately 0.5 suggesting grains is well sorted (0.35<σ<0.5) (Table 1). Skewness Skwhic is a measure of the symmetry of the grain...
2012
Application of Petrographic Image Analysis and Multivariate Statistical Techniques for Textural Studies of Oil Sand Samples, #41618 (2015).
Julie Dee Bell, Ovie Eruteya, Oko Oono
Search and Discovery.com
... to be normally distributed. The standard deviation σ is approximately 0.5, suggesting that grains are well sorted (0.35<σ<0.5) (Table 1). Skewness Skwhic...
2015
The Effect of Differences in Interpretation on the Lithological Evaluation of Electric Logs
Brian Hitchon
CSPG Bulletin
.../shale ratio. Skewness and kurtosis data occupy an intermediate position. Fairbairn, H. W., et al., 1951, "A Cooperative Investigation of Precision...
1964
Differentiation of Modern Sand Bodies by Linear Discriminant Analysis
R. J. Moiola, A. B. Spencer, D. Weiser
GCAGS Transactions
... the environmental sensitivity of textural parameters, demonstrated that certain combinations of textural parameters such as mean diameter and skewness effectively...
1974
Marine Erosion of Glacial Deposits in Massachusetts Bay
H. C. Stetson, Marshall Schalk
Journal of Sedimentary Research (SEPM)
... to the median, which is probably the one most important textural characteristic of given sediment, an expression for sorting and one for skewness is used...
1935
Sediments of the Submarine Canyons Off the California Coast
George V. Cohee
Journal of Sedimentary Research (SEPM)
... to some samples, and are shown in the histograms in figs. 3 through 10. SKEWNESS The coefficient of skewness (4) is a measure of the dissymmetry...
1938