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The AAPG/Datapages Combined Publications Database

Showing 638 Results. Searched 190,981 documents.

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New Techniques for Stratigraphic Analysis and Correlation--Fourier Grain Shape Analysis Louisiana Offshore Pliocene

John V. Mrakovich, Robert Ehrlich, Bernhard Weinberg

Journal of Sedimentary Research (SEPM)

... so, throughout harmonic 20, demonstrating that the upper half of the 11,000 foot interval contains quartz grains that, on the average are smoother than...


Compensating for the Compensation Effect Using Simulated and Experimental Kinetics from the Bakken and Red River Formations, Williston Basin, North Dakota, #41680 (2015).

Stephan H. Nordeng

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... that coincides with the compensation effect. An analytical solution exists that relates the harmonic mean of experimental temperatures containing random errors...


Conceptual Design for Mitigating Harmonic Distortion on ESP Installation: Case Study in Kaji Semoga Field, Medco E&P Indonesia

Sandy Suryakusuma, Suprapto Atmowiranto, Dadang Darmawan

Indonesian Petroleum Association

...Conceptual Design for Mitigating Harmonic Distortion on ESP Installation: Case Study in Kaji Semoga Field, Medco E&P Indonesia Sandy Suryakusuma...


Fold Geometry Within Part of Michigan Basin, Michigan

E. H. Timothy Whitten , Walter A. Beckman, Jr.

AAPG Bulletin

..., 1945). The unit has an average thickness of approximately 150 ft and a mean subsea depth of about 2,850 ft. The top of the Dundee Limestone...


Spherical Harmonic Deformation--A Discussion

D. G. de Paor

Journal of Petroleum Geology

...Spherical Harmonic Deformation--A Discussion D. G. de Paor 1980 455 456 2 4 There are so many contentious statements in this paper that only the most...


Sources of Pleistocene and Holocene Sand for the Northeast Gulf of Mexico Shelf and the Mississippi Fan

Jim Mazzullo, Charles Bates

GCAGS Transactions

... characteristic of fine sand fraction in representative Mississippi Fan samples. Figure 11. Vertical variation in mean second-harmonic amplitude value in sands...


Recognition of Sandstone Depositional Environment: A Grain Shape Approach, with an Example from North Padre Island

Jim Mazzullo , Donald Sims

GCAGS Transactions

... environments, however, it apparently plays a greater role; Pettijohn and Lundahl (1943), for example, noted a definite "decrease in average roundness...


Layered Modulus Effect on Fracture Modeling and Height Containment

Kaimin Yue, Jon E. Olson, Richard A. Schultz

Unconventional Resources Technology Conference (URTEC)

... depending on fracture tip location, namely the modified height-weighted mean and the modified height-weighted harmonic average. By combining linear...


Determination of Relative Provenance Contributions in Samples of Quartz Sand Using Q-mode Factor Analysis of Fourier Grain Shape Data

Carolyn Brauer Hudson, Robert Ehrlich

Journal of Sedimentary Research (SEPM)

... are nineteen harmonic amplitudes for each grain. For each sample of grains there are nineteen different shape frequency histograms. These histograms...


Roughness of Limestone and Quartzite Pebbles by the Modified Fourier Method

Eliza Czarnecka, J. E. Gillott

Journal of Sedimentary Research (SEPM)

... "normalized." At each harmonic the average amplitude for each sample may be divided by the grand mean of all samples. Mean values are thus reduced...


Origin of Patterns of Quartz Sand Types on the Southeastern United States Continental Shelf and Implications on Contemporary Shelf Sedimentation--Fourier Grain Shape Analysis

P. Jeffrey Brown , Robert Ehrlich, Donald J. Colquhoun

Journal of Sedimentary Research (SEPM)

..." continental margin (Emery, 1977). Average slope on the shelf is approximately 1 m/km. Many coastal plain rivers drain into the Atlantic Ocean in North...


An Exact Method for Characterization of Grain Shape

Robert Ehrlich, Bernhard Weinberg

Journal of Sedimentary Research (SEPM)

.... The first term in the series, RO, is equivalent to the average radius of the grain in the plane of interest. For the remainder of the terms, n...


Calculation of Thermal Conductivity from Lithology and Laboratory Measurements on Oil Well Cores: ABSTRACT

Victor Vacquier

AAPG Bulletin

...) The harmonic mean thermal conductivity of the whole rock column traversed by a well is calculated from the thicknesses of the different kinds...


Orientation Of Crinoids By Current Action

W. Schwarzacher

Journal of Sedimentary Research (SEPM)

... dominates. The frequency diagrams of orientation measurements are best described by harmonic analysis. KRINSELY, D., 1960, Orientation of Orthoceracone...



Eric J. Guiltinan and Matthew Becker

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Sources of Shoaling in Charleston Harbor Fourier Grain Shape Analysis

Donald S. Van Nieuwenhuise, Jeffrey M. Yarus, Robert S. Przygocki, Robert Ehrlich

Journal of Sedimentary Research (SEPM)

...). Each grain is defined by a series of shape components or harmonics which represent a specific contribution to the total shape (harmonic amplitude...


The Effects of Fluvial Abrasion on the Shapes of Quartz Sand Grains

Mark Peterson , Jim Mazzullo

GCAGS Transactions

... components (harmonics 2 through 24) and the relative contributions (amplitudes) of each harmonic are calculated. Each harmonic is a standard closed form...


Sieve Data-Size and Shape Information

Stephen K. Kennedy, Thomas P. Meloy, T. E. Durney

Journal of Sedimentary Research (SEPM)

...-sieved into quarter-phi intervals. The distribution of all average harmonic amplitudes versus size (representative harmonics shown in Fig. 2) shows...


Origin of Shape Changes of Sand and Silt in a High-Gradient Stream System

Stephen K. Kennedy , Robert Ehrlich

Journal of Sedimentary Research (SEPM)

... should be used for further analysis (Full et al. 1984). The entropy for each harmonic distribution is calculated. That harmonic with the lowest average...


Estimation of Arithmetic Permeability from a Semi-Log Porosity/Log10 Permeability Regression; #41583 (2015)

Gregory Benson

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... completely random nor perfectly correlated, with reality being somewhere between these extremes. Theoretically, a geometric permeability average approximates...


ESP Optimization Goes Further: Operating Frequency Beyond 60 Hz

Aliefiyan Nursanda Muklas, Bonni Ariwibowo, Hendra Kusuma, Winandar Amijaya, Dadang Darmawan

Indonesian Petroleum Association

... at XY-370 occurred at Harmonic Filter. The problem was solved by replacing the capacitor. The trial proves that we can operate ESP higher than base...


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