Abstract: Reservoir Characteristics of Upper Paleozoic Tight Sandstone Gas in the Southeast of the Ordos Basin, by Nianxi Wang, Hongxia Cao, Xiao Yin, Jinsong Zhou, Qianping Zhao, Ting Shang, and Juan Qiang; #90180 (2013)

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Artificial Intelligence Application on Seismic Data for Automatic First-Break Arrival Picking

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Abstract: Importance of Probability Distributions on Volumetric Characterizations in Resource Assessment; #91201 (2022)

David M. Advocate and Kenneth C. Hood

Search and Discovery.com

... be truncated, the bounded Beta distribution is more intuitive and can reasonably represent the appropriate level of skewness. We discourage using intermediate...

Petrographic Characteristics of Maximum-Transgressive and Regressive Deltaic Sandstones of Upper-Pennsylvanian (Virgilian) Oread Cyclothem, NE Oklahoma, #50886 (2013)

Lu Zhu, Wan Yang

Search and Discovery.com

... regressive Elgin delta in NE Oklahoma. 300 point-counts of each sample document amount of matrix, and composition, grain size, sorting, and skewness...

Long-Term Changes in Morphology and Textural Sediment Characteristics in Response to Energy Variation on Shoreface-Connected Ridges off the East Frisian Barrier-Island Coast, Southern North Sea

Chang Soo Son, Burghard W. Flemming, Alexander Bartholoma, Seung Soo Chun

Journal of Sedimentary Research (SEPM)

... bathymetry. Figure 6. Spatial distribution patterns of textural parameters. A) Sorting (standard deviation). B) Skewness. Viewed in more detail...

Determination of Depositional Environments of Sand Bodies Using Vertical Grain-Size Progressions

John B. Anderson, Carol Wolfteich, Robyn Wright, Mary Lou Cole

GCAGS Transactions

... deviation, skewness and kurtosis. Reed et al., (1975) have shown that settling velocity determinations provide more useful data End_Page 565...

The St. Clair River Delta: Sedimentary Characteristics and Depositional Environments

J. M. Pezzetta

Journal of Sedimentary Research (SEPM)

... asymmetric (skewness = +0.39) and moderately leptokurtic (kurtosis = 5.5). At the 90% confidence level and absolute values of r 0.15, significant linear...

Influence of Mixtures of Grain-Size Populations on the Parametric and Modal Characteristics of Coastal Sands (Herault, Mediterranean Sea, France)

J. Paul Barusseau

Journal of Sedimentary Research (SEPM)

... (sorting, skewness, and kurtosis) to small changes in the compositional formula of the mixture. The procedure followed supplies a good preliminary tool...

Variation of Beach Sand in Relation to Littoral Drift Direction along the Kuala Terengganu Coast

Rosnan Yaacob, M. L. Hussein, A. Tajuddin

Geological Society of Malaysia (GSM)

... and fine grained sand. The median grain size, as well as sorting and skewness values show a spatial and temporal variation throughout the entire study area...

Anomalous Beach Ridges of Sangamon Age

William F. von Drehle

GCAGS Transactions

... changes occur between the three established zonations within the ridges. Average mean grain size, standard deviation, and skewness decreased from...

Sediments of Buzzards Bay, Massachusetts

J. L. Hough

Journal of Sedimentary Research (SEPM)

... (1932) for sorting and skewness were then calculated for each sample. The sorting factor, So., equals Q3/Q1 and the skewness, Sk., equals...

Sediment Distribution Patterns in the Back-Barrier Areas of the Wadden Sea, Spiekeroog Island, Germany

N. Nyandwi

Special Publications of SEPM

... with overbank flow from one channel to the next The analysis of skewness evolution has been shown to be a powerful tool for the interpretation...

Experimental Error in Pebble Roundness Determination by the Modified Wentworth Method

Robert L. Folk

Journal of Sedimentary Research (SEPM)

... roundness of .53 for the suite, a simple confirmation of arithmetic-normality. The distribution has a skewness value of +.07 with kurtosis of .92...

Distribution, Composition and Characteristics of the Surficial Sediments of Lake Ontario

R. L. Thomas, A. L. W. Kemp, C. F. M. Lewis

Journal of Sedimentary Research (SEPM)

... with sedimentation from suspension. In addition, skewness and kurtosis show trends relative to mean grain size and standard deviation which can be explained in terms...

Grain-Size Trends Used to Assess the Effective Discharge for Floodplain Sedimentation, River Waal, The Netherlands

Nathalie E.M. Asselman

Journal of Sedimentary Research (SEPM)

... development in this type of research. He used spatial changes in three grain-size parameters, mean, sorting, and skewness, to delineate sediment transport...

GEOLOGY OF THE FORTY ACRE ABERFELDY STEAM PILOT

H.O. Maccagno and M.D. Watson

Saskatchewan Geological Society

... maturity. Variations in skewness are more inconsistent. Permeability trend maps for reservoir units conform closely to isopach contours. The limited...

Significance of Textural Criteria in the Recognition of Ancient Polar Deltaic Sediments

A. S. Naidu, T. C. Mowatt

Alaska Geological Society

... distribution curves as shown by very positive to very negative skewness values (figure 6). Figure 5. Scatterplots of phi mean size (Mz) versus standard...

The Petrology and Reservoir Capabilities of the Cretaceous Tygee Member of the Bear River Formation in Southeastern Idaho

James Edward Kamis

Wyoming Geological Association

... of that section. Consistent lateral trends were not apparent. Site 6 showed the largest mean grain size, and site 11 the lowest (Figure 4). Skewness, kurtosis...

Size Frequency Distributions of Sediments and the Normal Phi Curve

W. C. Krumbein

Journal of Sedimentary Research (SEPM)

... described by its two parameters, M and . 4. The skewness of the curve is zero. Mathematically, the third moment about the mean, m3, expressed as 3 = m3/3...

Significance of Textural Variations, Baltimore Canyon Trough Area

Harley J. Knebel

Journal of Sedimentary Research (SEPM)

... and total sand, percentages of coarse, medium, and fine sand, median and mean phi sizes, skewness, and kurtosis. Some of the -phi-size fractions...

Vertical Grain Size Progressions as an Aid in Intepreting Depositional Environments, Queen City Formation (Eocene), East Texas

Elizabeth Ann Watkins , John B. Anderson

GCAGS Transactions

..., sedimentary structures, and facies relationships. Then, vertical changes in mean grain size, mode, sorting, skewness, sand content, and frequency...

Interpretation of storage and retrieval major-ion chemistry, with emphasis on significant sulfate and sodium concentrations in the White River watershed, northwestern Nebraska, United States

Jon C. Atkinson

Environmental Geosciences (DEG)

... with a median value of 0.75, verifying slightly supersaturated conditions. Skewness coefficients for all major ions range from 1.3 (K) to 3.1 (CaCO3...

Sedimentary Facies, Structures, and Grain-Size Distribution: The Red River in Oklahoma and Texas

Daniel E. Schwartz

GCAGS Transactions

... to be coarse-skewed. Mean grain-size, standard deviation, and skewness are the most powerful discriminators. Scatter diagrams plotting...

Significant Error Reduction in Machine-Learning Decline Curve Analysis for Unconventional Reservoirs

Boxiao Li, Travis Billiter, Timothy Tokar

Unconventional Resources Technology Conference (URTEC)

... that the error mean, deviation, and skewness can be significantly reduced by 15% to 35% compared with ML-DCA without DPR. The error reduction is 30...

Oil Exploration Analysis of Recent Carbonate Facies

Hugh J. Mitchell-Tapping

GCAGS Transactions

... in skewness and kurtosis with a considerable amount of internal variation and overlap within each environment. Large differences in the percentage...