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The AAPG/Datapages Combined Publications Database
Showing 23,326 Results. Searched 195,452 documents.
Background Metal Concentrations in Soils in Northern Santa Clara County, California
Christina M. Scott
Pacific Section SEPM
... over 150 samples were entered into a database. The average, standard deviation and range of concentrations for each metal were calculated, except...
1995
Development of Soil on the Lunar Surface
John F. Lindsay
Journal of Sedimentary Research (SEPM)
... produces a bimodal distribution of glass particles such that the median grain size stabilizes at approximately 3.5 and the standard deviation of size...
1972
A Discussion of the Importance of Particle Size Distribution Data for Characterizing Athabasca Oil Sands
Olena Babak
CSPG Bulletin
... percentiles, e.g. D84.1–D16.9, or standard deviation, all in phi units). Babak and Resnick (2014) showed empirically, using an example of the Telephone...
2015
A Compensated Spectral Natural Gamma Ray* Logging System
C. Kessler, R. Washa, G. S. Yarbro
Indonesian Petroleum Association
... measurements is that the true formation value has a 68% probability of being within plus or minus one standard deviation and a 95% probability...
1984
A Modified Logarithmic Probability Graph for the Interpretation of Mechanical Analyses of Sediments
George H. Otto
Journal of Sedimentary Research (SEPM)
... and diameter . [EQUATION] M=phi arithmetic mean diameter. =phi standard deviation. k=phi skewness=Krumbein's 3 or twice his Sk (11, p. 40). =any diameter...
1939
Rapid Methods of Making Sedimentational Analyses of Arenaceous Sediments
Willard D. Pye
Journal of Sedimentary Research (SEPM)
... is the geometric standard deviation for either counting or weight determination since the geometrical standard deviation for count and for weight...
1943
Sulfur Isotope Study—Park City, Utah
Uldis Jansons
Utah Geological Association
... atmosphere at 1150° C. Precision of preparation and analysis is 0.26 ‰ S34 standard deviation. Sulfur dioxide preparation from gypsum involves...
1968
Determination of n in Weight Frequency Data
Thomas A. Jones
Journal of Sedimentary Research (SEPM)
...) nshould reflect the total size of the sample (3) n should be independent of the mean and standard deviation of the sample; and (4) the value of n should...
1969
Plotting Equation for Gaussian Percentiles and a Spreadsheet Program for Generating Probability Plots: RESEARCH METHODS PAPERS
James H. Balsillie, Joseph F. Donoghue, Kenji M. Butler, Jennifer L. Koch
Journal of Sedimentary Research (SEPM)
... and standard deviation using composite statistics (see Balsillie and Tanner 1999) of the grain-size distribution are used in calculations to determine...
2002
Shale Facies and Seal Variability in Deep Marine Depositional Systems
William C. Dawson, William R. Almon
Special Publications of SEPM
... deviation: 7.5%). Quartz abundance ranges from 12 to 43 percent (mean: 26.5%; standard deviation: 8.2%). Detrital feldspars (K-feldspar: mean 2.8...
2004
ABSTRACT: CO2 STORAGE PROPERTIES OF SYDNEY BASIN COALS
A. Saghafi
The Society for Organic Petrology (TSOP)
... Meeting of the Society for Organic Petrology: 2004, Volume 21 Sydney, New South Wales, Australia, 27 September – 1 October, 2004 Australian standard...
2004
The Primrose-Kirby Area in the Southern Athabasca, Alberta, Canada: A Detailed Geological Investigation: Section V. Exploration Histories
F. Dekker, C. Visser, P. Dankers
AAPG Special Volumes
... moment statistics: mean, mode, standard deviation, kurtosis, and skewness. For each sample a probability plot is made. Besides the particle-size...
1987
Developing a Wireline-Log Database and a Basis for Determining Reservoir Porosity
Jeffrey A. Kane, James W. Jennings Jr.
AAPG Special Volumes
... inadequate. The final normalization method used is different from traditional methods in that the mean and standard deviation of the data at each well...
2012
Application of Fourier Transform Infra-Red Spectroscopy in Determination of Reservoir Properties
John Woods
Indonesian Petroleum Association
... that are reproducible to within+/-5% standard deviation. A set of mineral standards was produced from pure mineral powders of calcite, dolomite, quartz...
2014
New Beach Ridge Type: Severely Limited Fetch, Very Shallow Water
William F. Tanner , Suleyman Demirpolat
GCAGS Transactions
... deviation of 0.30 phi units. The open beach dune sands have a diameter of 2.69 phi (0.16 mm), and a standard deviation of 0.28 phi. These are excellent...
1988
Strategies for Sampling Spatially Heterogeneous Phenomena: the Example of River Gravels
John Wolcott , Michael Church
Journal of Sedimentary Research (SEPM)
... of these composite samples will provide an estimate of the mean and standard deviation of a population statistic which can be used to construct confidence...
1991
Comparison of Oil-Source Rock Correlation Data for Alaskan North Slope: Techniques, Results, and Conclusions: INTRODUCTORY PAPERS
G. E. Claypool, L. B. Magoon
AAPG Special Volumes
... is summarized for each sample at the bottom of the tables in terms of the mean, standard deviation, and coefficient of variation. In general...
1985
Eolian Cross-Bedding in the Beach Dune Environment, Sapelo Island, Georgia
Lynton S. Land
Journal of Sedimentary Research (SEPM)
... degrees with a standard deviation of 53 degrees. The mean dip of the slipfaces is 34.7 degrees with a range of 30 degrees (by definition) to 42 degrees...
1964
Observed Relation of Soil Magnetic Susceptibility and Soil Gas Hydrocarbon Analyses to Subsurface Hydrocarbon Accumulations (1)
DONALD F. SAUNDERS, K. RAY BURSON, and C. KEITH THOMPSON
AAPG Bulletin
... are expressed statistically in terms of the appropriate background mean and standard deviation. Soil MS and soil GHC data complement each other, providing...
1991
Production Log Analysis Challenges Due to Liquid Loading in Inclined Gas Wells
J.J. Kohring, E.A. Nnebocha
Indonesian Petroleum Association
... uniform. Flow behavior in completions greater than 75 degrees deviation is dominated by gravitysegregated triphasic production and is sufficiently...
2010
Geochemical Microseep Survey of the Plaza and Wabek Productive Trends, Mountrail and Ward Counties, North Dakota
Mark Webster, Thomas Van Arsdale
Williston Basin Symposium
..., potential anomalies are further evaluated statistically by computing the mean and standard deviation of the entire population (Sinclair...
1995
ANALYSES OF COAL AND ASH FROM LIGNITES AND SUBBITUMINOUS COALS OF EASTERN MONTANA
S. ALEX COOLEY, R. C. ELLMAN
Montana Geological Society
.... Table 7: Average, standard deviation, maximum...
1975
Grain Size Parameters For Sandy-Gravels
K. R. Dyer
Journal of Sedimentary Research (SEPM)
... from normal distributions. Sorting (Standard Deviation) For a normal distribution the spread between the 16th and 84th percentiles is twice...
1970
The Use of Grain Size Statistics to Distinguish Between High- and Moderate-energy Beach Environments
Karl F. Nordstrom
Journal of Sedimentary Research (SEPM)
... gram. Grain size statistics for the mean (Mz), standard deviation (I), skewness (SKI), and kurtosis (KG), were obtained using Folk s graphic method (Folk...
1977
Grain Fabrics in Turbidite Sandstone Beds and Their Relationship to Sole Mark Trends on the Same Beds
Ivan P. Colburn
Journal of Sedimentary Research (SEPM)
.... The column labeled "Deviation from Standard" indicates the number of degrees the mean grain trend at each sample level deviates from the trend...
1968