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The AAPG/Datapages Combined Publications Database
Showing 661 Results. Searched 195,364 documents.
Use of Computers by Geologists: Abstract
Daniel F. Merriam
Tulsa Geological Society
..., and cosine-theta) harmonic analysis (includes time series, Fourier and power-spectrum analysis) auto- and cross-association PCA (principal component...
1967
Abstract: Hurricane and Standing Wave, Lagoonal Pattern Makers, Texas Coast
W. Armstrong Price
GCAGS Transactions
... fans at tidal inlets, have segmented the lagoons into successions of oval and round basins in harmonic series of 12, 6, 4, 2, 1, and 0.5 mile lengths...
1981
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...
1963
Sources and Nonsources of Beach Sand Along Southern Monterey Bay California--Fourier Shape Analysis
Gerald A. Porter, Robert Ehrlich, Robert H. Osborne, Rodney A. Combellick
Journal of Sedimentary Research (SEPM)
... term is of the form: Rn cos (n - n) where Rn represents the amplitude of the "nth" harmonic and the remainder concerns the phase angle of that harmonic...
1979
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...
1981
Relationship Between Test Morphology and Bathymetry in Recent Bolivina albatrossi Cushman, Northwestern Gulf of Mexico: ABSTRACT
Anthony C. Gary
AAPG Bulletin
... classification algorithm using Fourier harmonic amplitudes divides the ba hyal zone into four subzones. With further development this approach could allow...
1985
-- no title --
user
Search and Discovery.com
... resolution (5m) and broad bandwidth (8-175Hz). The method is considered to address three main areas of vibroseis specific noise: harmonic energy, side-lobe...
Unknown
-- no title --
user
Search and Discovery.com
... resolution (5m) and broad bandwidth (8-175Hz). The method is considered to address three main areas of vibroseis specific noise: harmonic energy, side-lobe...
Unknown
Extending seismic bandwidth using the harmonic energy of a marine vibrator source
Tiexing Wang, Arash JafarGandomi, Hakon Aune
International Meeting for Applied Geoscience and Energy (IMAGE)
... that the total harmonic energy is, on average, about 25 dB lower than the fundamental frequency signal (Elboth et al., 2023). Notional source estimation...
2023
1989
Abstract: Sand Body Geometry and Permeability Areal Distribution in Fluvial Sandstones Reservoir, by A. Francesconi, M. Erba, A. Puliti, and M. Rampoldi; #90956 (1995).
Search and Discovery.com
1995
Sequence Stratigraphic Controls on Lower to Middle Carboniferous Siliciclastic Deposition in STACK, North-Central, Oklahoma, U.S.A.
Search and Discovery.com
N/A
ABSTRACT: Uncorrelated Data-Driven Vibroseis Deconvolution; #90051 (2006)
Peter I. Pecholcs
Search and Discovery.com
... includes useable harmonic distortion frequencies up to 150Hz (Figure 1). Using this signal to design an optimum inverse filter yields higher-resolution...
Unknown
Uncorrelated Data Driven Vibroseis Deconvolution
Search and Discovery.com
N/A
The Origin of Shape Frequency Distributions and the Relationship Between Size and Shape
Robert Ehrlich, P. Jeffrey Brown , Jeffrey M. Yarus , Robert S. Przygocki
Journal of Sedimentary Research (SEPM)
... is known as its harmonic amplitude. Previous studies have shown that, for detrital quartz particles, sufficient information is contained in the first...
1980
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...
1987
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...
1978
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...
1985
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...
2020
The Effect of Grain Orientation on Fourier Shape Analysis
Stephen E. Tilmann
Journal of Sedimentary Research (SEPM)
... and fed into a Fourier analysis computer program that reduces the shape into their harmonic components. (For a complete discussion of the analytical method...
1973
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...
1985
Cascaded Sweeps- A Method to Improve Vibroseis Acquisition Efficiency: A Field Test
M. Benabentos, F. Ortigosa, N. Moldoveanu, P. Munoz
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... a function of the signal-to-noise ratio in the area. For instance, if, based on evaluation of the harmonic energy in a certain area, it is considered nd rd...
2006
Abstract: Borehole Vibration Response to Hydraulic Fracture Pressure; #90187 (2014)
Andy St-Onge, David W. Eaton, and Adam Pidlisecky
Search and Discovery.com
... reveal distinct frequency peaks that change over the duration of the frac treatment. Research into harmonic vibration of pipelines and piping systems can...
2014
On the Use of the Term "Amplitude" in Ripple Mark Description: NOTES
Supriya Sen Gupta
Journal of Sedimentary Research (SEPM)
... on the characteristics of simple harmonic motion graphically represented in figure 2. It is clear from this definition of "amplitude" that by measuring...
1965
Effects of Tropical Weathering on Quartz Grain Shape: an Example from Northeastern Australia
Kenneth Pye , Jim Mazzullo
Journal of Sedimentary Research (SEPM)
... the nearshore shelf. However, relatively little sediment from these sources now reaches Ramsay Bay; rather, the principal sour es of modern sediment...
1994