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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,616 documents.
Seamount Age Estimates from Paleomagnetism and Their Implications for the History of Volcanism on the Pacific Plate
William W. Sager
Circum Pacific Council Publications
... between the two methods is that the former assumes that the magnetization of the seamount is homogeneous but the latter does not. In the least-squares...
1992
Magnitude-rupture area scaling derived from global earthquakes of moderate to large sizes: Implications for seismic hazards in Indonesia
Tjipto Prastowo, Gandhis Putri Ayudia, Hilda Risanti
Geological Society of Malaysia (GSM)
... and Thingbaijam et al. (2017) appears is that they utilised orthogonal regressions instead of least-squares regressions, as is the case in this study. Another...
2022
Application of a Stochastic Deposition and Erosion Model to Reservoir Heterogeneity and Stratigraphic Data
Jon D. Pelletier, Donald L. Turcotte
Special Publications of SEPM
... Valley I1aly published in Claps and Maselli 1994 The coefficients in the exponential dislribu tions determined by a least squares fil of the logarithm...
1999
Measuring Sandstone Compaction from Modal Analysis of Thin Sections: How to Do It and What the Results Mean
S.N. Ehrenberg
Journal of Sedimentary Research (SEPM)
... is the least-squares fit to a larger set of Garn Formation data, including these points plus average core porosity values from 12 additional wells...
1995
Prewell and postwell predictions of oil and gas columns using an iterative Monte Carlo technique with three-dimensional petroleum systems modeling
Are Tømmerås, Øyvind Sylta, Matthias C. Daszinnies, and Davide Mencaroni
AAPG Bulletin
.... 219–235, doi:10.1016/S0928-8937(07)80020-8. Lloyd, S., 1982, Least squares quantization in PCM: IEEE Transactions on Information Theory, v. 28, p...
2018
Anatomy of a Flysch
Paul Enos
Journal of Sedimentary Research (SEPM)
... to derive an empirical formula by least squares fit (regression) for the observed rate of downcurrent disappearance of individual beds in ß7 member...
1969
Simple X-Ray Diffraction Techniques to Identify Mg Calcite, Dolomite, and Magnesite in Tropical Coralline Algae and Assess Peak Asymmetry
Merinda C. Nash, Bradley N. Opdyke, Zhongwei Wu, Huifang Xu, Janice M. Trafford
Journal of Sedimentary Research (SEPM)
... modeling of XRD patterns combined with a least-squares fitting procedure, such as Rietveld refinement (Hunter 1998). This method has been used (e.g., Nash...
2013
Geologic Interpretation of Gravity Anomalies of Northeastern Utah
James T. Smith, Kenneth L. Cook
Utah Geological Association
... was drafted from the computer-contoured map with some hand smoothing of the contours; also a 5-mgal contour interval was used for the Uinta Mountains area...
1985
Statistical Analysis of Turbidite Cycles in Submarine Fan Successions: Tests for Short-Term Persistence
Chengsheng Chen, Richard N. Hiscott
Journal of Sedimentary Research (SEPM)
... correlation, and Pearson's correlation) and the least-squares method. The utility and power of these methods are confirmed, below, by our results...
1999
Downstream Changes of Alpine Zircon Fission-Track Ages in the Rhone and Rhine Rivers
Matthias Bernet,, Mark T. Brandon, John I. Garver, Brandi Molitor
Journal of Sedimentary Research (SEPM)
... component of the mixture. We use a constrained weighted least-squares method to find best-fit estimates for the unknown proportions j. The probability...
2004
The magnetic fabric of the Wolfcamp shale, Midland Basin, west Texas: Understanding petrofabric variability, hydrocarbon associations, and iron enrichment
Gerhard W. Heij, and R. Douglas Elmore
AAPG Bulletin
...; however, more orientations provide over determinacy of the matrix diagonal, which allows calculation of tensor fits by least squares methods (see Girdler...
2019
Formation of Lateral Patterns In Rock Properties By Dolomitization: Evidence From A Miocene Reaction Front (Bonaire, Netherlands Antilles)
David A. Budd, Whitney D. Mathias
Journal of Sedimentary Research (SEPM)
...–permeability cross plot for limestones and dolostones. Solid lines are least-squares linear regressions. Fig. 9. Lateral variation in porosity...
2015
Laboratory Study of Gas and Water Flow in the Nordland Shale, Sleipner, North Sea
J. F. Harrington, D. J. Noy, S. T. Horseman, D. J. Birchall, R. A. Chadwick
AAPG Special Volumes
... of the specimen), Figure 8, it is possible to estimate capillary pressure required to initiate gas flow. Least-squares linear extrapolation of the flow...
2009
Geostatistical three-dimensional modeling of oolite shoals, St. Louis Limestone, southwest Kansas
Lianshuang Qi, Timothy R. Carr, Robert H. Goldstein
AAPG Bulletin
... using a least-squares algorithm, which tends to produce connected features as opposed to disconnected closures. All contours were smoothed using grid...
2007
Jurassic Magmatic Arc in the Alaska-Aleutian Range Batholith–Chemical Variations and Polarity*
Bruce L. Reed, Alfred T. Miesch, Marvin A. Lanphere
Alaska Geological Society
... surfaces, fitted by conventional least-squares methods, were used to examine the geographic variation of major oxides, normative minerals, and a few...
1983
Perspectivities in the Solar System: DISCUSSION
D. H. Hall
CSPG Bulletin
... relation, is a hyperbola rather than a logarithmic curve as stated. A least squares best-fit of (1) to the points plotted in Fig. 5 gives, with x...
1961
Seismic Foldout: Potential Prospectivity Identified in the Orphan Basin
Yermek Balabekov, Yang Yang, Sriram Arasanipalai, PGS Ultima
GEO ExPro Magazine
... to the main products. Text: Yermek Balabekov, Yang Yang, Sriram Arasanipalai; PGS Full Waveform Inversion (FWI) followed by Least-Squares Migration (LSM...
2022
Borehole gravity in Horizontal Wells
Andrew J. Black, Jennifer Hare
Petroleum Exploration Society of Australia (PESA)
... straightforward involving a linear least squares fit of repeated measurements at the gravity stations but these tend to involve most processing time...
2018
Seismic Foldout: Revealing a Promising New Play Concept in the Salar Basin, Offshore Canada
Yermek Balabekov, Susana Tierrablanca, Sriram Arasanipalai, Nizar Chemingui, PGS
GEO ExPro Magazine
... various attributes. Traditionally, a sequential workflow using Full Waveform Inversion (FWI) followed by Least- Squares Reverse Time Migration (LS-RTM...
2023
Production Allocation and Fluid Fingerprinting in Conventional Reservoirs
Craig D. Barrie, Eric Michael
GEO ExPro Magazine
... contributions by solving equations (e.g. least squares best fit) and uncertainty estimation NO “ONE SIZE FITS ALL” APPROACH The primary output from...
2023
Relation of Carbon Dioxide Content of Apatite of the Phosphoria formation to Regional Facies
Robert A. Gulbrandsen
Rocky Mountain Association of Geologists
... western A and South Carolina, and the western United States. A least-squares for e x p r e s s i o n y=a+bx least-squares line for the expression y=a+bx...
1971
A Note on 'A Procedure for Computing the Lattice Constants of Some Crystal Systems by Chan (1976)'
Y. H. Lye
Geological Society of Malaysia (GSM)
... and then solving them by the method of least squares. The normal equation derived are transformed into matrix notation and are solved by using Gauss...
1978
Satellite Magnetic Anomalies over Southeast Asia
G. Van Klinken, C. Y. Lee, M. H. Loke
Geological Society of Malaysia (GSM)
... and ionosphere .the data set has been significantly trimmed and corrected in a manner described by Regan, et aZ (1975). In addition, a linear least...
1980
Rock Temperatures and Depths to Normal Boiling Point of Water in the United States
H. Cecil Spicer
AAPG Bulletin
...-line equation, [EQUATION] which have been obtained for each location given in the table by making a least-squares adjustment of the straight line...
1936
Grain Size Measurement in Thin Section and in Grain Mount: NOTES
Richard E. Smith
Journal of Sedimentary Research (SEPM)
... of the slope, for the length of the "a" axis measured in thin section and grain mount obtained by the method of least squares is: Y = .719 + .791 X (9) where Y...
1966