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The AAPG/Datapages Combined Publications Database
Showing 1,465 Results. Searched 196,426 documents.
Tyee Formation: A Study of Proximality in Turbidites
J. P. B. Lovell
Journal of Sedimentary Research (SEPM)
... are all on the same horizontal scale (see fig. 4); the numbers refer to the squares of the grid shown on figure 2. The least squares lines were...
1969
Experimental and Numerical Simulation Using X-ray Photoelectron Spectroscopy (XPS) and PHREEQC for Geochemical Interaction Effect on ScCO2-EOR and Storage in Unconventional Reservoirs
Billel Sennaoui, Hui Pu, Nuri Oncel, Mohamed Lamine Malki, Samuel Afari
Unconventional Resources Technology Conference (URTEC)
... core-level spectra were analyzed with a least-squares minimization curve fitting program. In addition, elemental compositions of calcitic/dolomitic...
2023
Assessing B-Factor Through Production Analysis and Simulation Modeling in Permian Unconventional Wells
Mei Han, Paul Nguyen, Markus Emsermann, Cyd Ruidiaz-Santiago, Xueying Xie, Soodabeh Esmaili, Osama Raba
Unconventional Resources Technology Conference (URTEC)
... of least squares, whereby it minimizes the sum of the differences between the observed (actual monthly) production value and the fitted value provided...
2024
Boron in Illite as an Indicator of Paleosalinity of Illinois Coals
B. F. Bohor, H. J. Gluskoter
Journal of Sedimentary Research (SEPM)
... is performed by the colorimetric method. FIG. 4. Boron in illite versus illite percentage of clay mineral fraction. (Least squares regression on data...
1973
Ooids from Great Salt Lake, Utah, as an Analogue for the Genesis and Diagenesis of Ooids in Marine Limestones
Charles F. Kahle
Journal of Sedimentary Research (SEPM)
.... S. HANWERKER, 1963, The least-squares refinement of crystal unit cells with powder diffraction data by an automatic computer indexing method (abs.): Pros. Ann...
1974
A New Approach to Pore Pressure Predictions: Generation, Expulsion, and Retention Trio—Case Histories from the Gulf of Mexico
Selim Simon Shaker
GCAGS Transactions
... the borehole stable and avoiding any formation water flow follows an exponential trend as the least squares best fit for the data ranges from 9.15 to 11.7 ppg...
2015
Effect of Particle Shape on the Packing of Carbonate Sands and Gravels
Robert J. Vinopal , Alan H. Coogan
Journal of Sedimentary Research (SEPM)
... was established which relates the extrapolated, infinite grain volume to the grain volume measured in a single container (Vinopal, 1976). The least squares...
1978
Estimates of Sand Transport on the New York Shelf Using Near-bottom Current Meter Observations
P. E. Gadd, J. W. Lavelle, D. J. P. Swift
Journal of Sedimentary Research (SEPM)
... current speed of 30 cm/sec is reached. A least-squares analysis of the more recent flume data was performed in order to re-evaluate the coefficients...
1978
Assessing Regional Oil and Gas Potential
D. A. White , R. W. Garrett Jr. , G. R. Marsh , R. A. Baker , H. M. Gehman
AAPG Special Volumes
.... Although the data base is small and the variations are large, we have made a least-squares fit of the annual growth rate versus cumulative growth...
1975
Modern Cool-Water Beach Sands of Southwest England
John R. Merefield
Journal of Sedimentary Research (SEPM)
.... The regression line is a least-squares fit. TABLE 1. Carbonate mineralogy of modern beach sands of southwest England End_Page 417...
1984
Recognition and Significance of Inherited Quartz Overgrowths in Quartz Arenites
Ivan D. Sanderson
Journal of Sedimentary Research (SEPM)
... with visible signs of truncation, were calculated. Results of the experiment are shown in Figure 8, a least-squares regression in which s/p values are plotted...
1984
Isotope Geochemistry of Minerals in Australian Bituminous Coal
R. W. Botz , J. W. Hunt, J. W. Smith
Journal of Sedimentary Research (SEPM)
... by a "least-squares" fit to the existing data and represents the relative changes in total 18O value which would accompany the mixing of primary kaolinite...
1986
Compressibility of Sandstones at Low to Moderate Pressures
I. Fatt
AAPG Bulletin
... lines, plotted as a function of reciprocal pressure. The line fitted by least squares to these data can be extrapolated to give 0.18 × 10-6 psi-1...
1958
Morphology and Origin of an Erosion Surface Cut into the Bad Heart Formation During Major Sea-Level Change, Santonian of West-Central Alberta, Canada
A. Guy Plint, Roger G. Walker
Journal of Sedimentary Research (SEPM)
... the isopach data. A regular grid of data points was first set up by a weighted, moving least-squares analysis of the real data points in Figure 4. The grid...
1987
Storm-dominated Sedimentation on the Inner Shelf of the Canadian Beaufort Sea
Philip R. Hill , Odette C. Nadeau
Journal of Sedimentary Research (SEPM)
... of the transmissometer was obtained, despite the wide range of concentrations. Least squares regression analysis shows a linear relationship (Fig. 2...
1989
Bed Configurations in Steady Unidirectional Water Flows. Part 1. Scale Model Study Using Fine Sands
Lawrence A. Boguchwal , John B. Southard
Journal of Sedimentary Research (SEPM)
... by fitting least-squares straight lines through full centerline profiles--a method that itself introduced an error of a few percent in depth measurement...
1990
Flume Experiments on the Transport of Heavy Minerals in Gravel-Bed Streams
Roger A. Kuhnle , John B. Southard
Journal of Sedimentary Research (SEPM)
..., flow depth, and water-surface slope were measured during each set. Water-surface slope was found from a least-squares straight line through water...
1990
Micritized Skeletal Grains in Northern Belize Lagoon: A Major Source of Mg-calcite Mud
R. Pamela Reid, Ian G. Macintyre, Jeffrey E. Post
Journal of Sedimentary Research (SEPM)
... composite powder diffraction pattern. This calculated pattern is compared on a point-by-point basis to the observed pattern and then using a least squares...
1992
Structural Analysis, and Geometrical Prediction for Change of Form with Depth, of Some Arabian Plains-Type Folds
W. Sugden
AAPG Bulletin
... of least squares can be applied to determine the best possible equation from the data of all the holes. Ideally, if data are thought to be well...
1962
Fabric Evolution and Mechanisms of Diagenesis in Fine-Grained Sediments from the Kita-yamato Trough, Japan Sea
Achim Kopf, Jan H. Behrmann
Journal of Sedimentary Research (SEPM)
... particles by a least-squares fit (Fig. 7B). Data qualit generally is tolerable if either the center of the plot (Fig. 7A) is free of points...
1997
Resolving Sedimentological Uncertainties Using Magnetostratigraphic Correlation: An Example from the Middle Jurassic of Burgundy, France
Kifaya N. Belkaaloul , Djafar M. Aissaoui , Michel Rebelle , Gerard Sambet
Journal of Sedimentary Research (SEPM)
... analysis (Kirschvink 1980) with linear segments fit by least-squares analysis with three or more points between 330° and 550°C for thermally cleaned...
1997
Multicomponent Analysis of FTIR Spectra: Quantification of Amorphous and Crystallized Mineral Phases in Synthetic and Natural Sediments
Jacques Bertaux , Francois Frohlich , Philippe Ildefonse
Journal of Sedimentary Research (SEPM)
......, M; i = 1,..., N] recorded in the same conditions (i.e., quartz, kaolinite,....): [EQUATION] Determination of the xj coefficients to obtain a least...
1998
AAPG Studies in Geology 47: Geological Perspectives of Global Climate Change, Chapter 11 - The Search for Patterns in Ice-Core Temperature Curves
Davis, John C.; Bohling, Geoffrey C.
AAPG Special Volumes
... by least squares. This transformation does not alter the test results.) Figure 1...
2001
Petrology of Cretaceous Mowry Shale of Wyoming
John Clements Davis
AAPG Bulletin
.... Soc. America Bull., v. 73, p. 1437-1442. Peikert, E. W., 1963, IBM 7090 program for least-squares analysis of three-dimensional geological...
1970
Carbonate Porosity Versus Depth: A Predictable Relation for South Florida
James W. Schmoker, Robert B. Halley
AAPG Bulletin
... can draw conclusions with basin-wide applicability. POROSITY VERSUS DEPTH Exponential Representation The least-squares exponential fit to the data...
1982