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The AAPG/Datapages Combined Publications Database
Showing 1,687 Results. Searched 200,983 documents.
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
Theory and Methodology for Seismic Texture Analysis: Implications for Seismic Facies Visualization and Interpretation
Dengliang Gao
GCAGS Transactions
... with the model by calculating regression gradient based on a linear least-squares regression analysis. To minimize the impact of phase of wiggle traces...
2006
Comparison of the Descriptors of Sediment Grain-Size Distributions: DISCUSSION
Basanta K. Sahu
Journal of Sedimentary Research (SEPM)
... for computation of Edgeworth's estimators by nonlinear least squares method will be great and in view of the inaccuracies of sieve data (as pointed out in A above...
1971
Utility of Mechanical Facies for Rock Classification, Characterization, and Correlation: Reservoir Characterization: Petrophysical Formation Evaluation and Rock Description
K. A. Alhilali, G. Shanmugam
AAPG Special Volumes
... reflect the different composition and matrix structure of each group, which they often do, then estimates of porosity, based on a least-squares line...
1991
Relation Between Chlorinity and Conductometric Salinity in Black Sea Water: Water
Klaus Kremling
AAPG Special Volumes
...)] Inserting the values from Table 1 and using the method of least squares, we can calculate b and a: b = 1.8128 and a = 0.0002. The standard deviation...
1974
Structural Significance and Analysis of Mid-Continent Gravity High
Richard L. Coons , George P. Woollard , Garland Hershey
AAPG Bulletin
.... Exploration Geophysicists Yearbook, p. 267. Simpson, S. M., Jr., 1954, Least squares, polynomial fitting to gravitational data and density plotting...
1967
Approximation of Geothermal Gradients in Northern West Virginia Using Bottom-Hole Temperatures from Electric Logs: GEOLOGIC NOTES
T. W. Grisafi , H. H. Rieke, III , D. R. Skidmore
AAPG Bulletin
... least-squares fit the coefficients of a seventh-degree polynomial. A high-degree polynomial was deemed desirable so that results from later...
1974
Improved Statistical Method for Assessment of Undiscovered Petroleum Resources
David J. Forman, Alan L. Hinde
AAPG Bulletin
... of field size (for fields of the same rank) plotted against discovery number. The average straight line has been fitted to the data by the least-squares...
1985
Abstract: Sub-Basalt Integrated Geophysical Study Islandmagee, Northern Ireland; #90171 (2013)
M. Best, R. Charters, K. Morrison, and C. Nahas
Search and Discovery.com
.... References Loke, M.H., and Barker, R.D., 1996, Rapid least-squares inversion of apparent resistivity pseudosections by a quasi-Newton method: Geophysical...
2013
Abstract: Sub-Basalt Integrated Geophysical Study Islandmagee, Northern Ireland; #90171 (2013)
M. Best, R. Charters, K. Morrison, and C. Nahas
Search and Discovery.com
.... References Loke, M.H., and Barker, R.D., 1996, Rapid least-squares inversion of apparent resistivity pseudosections by a quasi-Newton method: Geophysical...
2013
Abstract: A New Method of Multiple Attenuation: Multiple Identification and Subtraction (II); #90171 (2013)
Wen-Jing Wu
Search and Discovery.com
... be that the Radon transformation method, based on the best fit to input data by least-squares sense, treats signal and noise equally, and MIDAS, based...
2013
Abstract: Monte Carlo Markov Chain Methods in Seismic Deconvolution; #90174 (2014)
Andres Medina and Mirko van der Baan
Search and Discovery.com
... of a linear filter. Wiener filtering is one of the most commonly applied techniques for wavelet removal as it can be shown to be optimal in a least squares...
2014
Abstract: Array Analysis of Surface Microseismic Data from the Rolla Microseismic Experiment; #90174 (2014)
Katarina Seckarova and David W. Eaton
Search and Discovery.com
... with the smallest least-squares error provided the solution. In addition, error plots provide a measure of the level of uncertainty in these parameters...
2014
Abstract: Towards Using Harmonic Noise to Image Shallow Thin Reflectors; #90187 (2014)
Christopher B. Harrison, Gary Margrave, Michael Lamoureux, Art Siewert, Andrew Barrett, and Helen Isaac
Search and Discovery.com
... of algorithms that decomposed harmonics from a single vibrator sweep. The Gabor transform and least squares methodology were used by Harrison et al. (2012...
2014
Abstracts: Ground Roll Attenuation Using LWD; #90173 (2015)
Ken Kocon and M. Sacchi
Search and Discovery.com
... Geophysicists (Ed.), 74th Annual International Meeting, Expanded Abstracts (2004). Theune, U., M. Sacchi, and D. Schmitt. “Least-squares local Radon transforms...
2015
Abstracts: Using Seismic Source Parameters to Characterize Reservoir Deformation; #90173 (2015)
Marc Prince, Adam Baig and Ted Urbancic
Search and Discovery.com
... in Figure 1, expected energy release values are based on a least squares fit of the scatterplot of moment magnitude versus seismic energy. As such, regions...
2015
Abstract: Real Time Microseismic Monitoring in China: A Case Study; #90224 (2015)
Michael D. Kratz
Search and Discovery.com
.... The source mechanism solution for microseismic events is derived by assuming a point source and using a least squares inversion of the observed Pwave...
2015
Prestack Impedance Inversion Aids Interpretation, by Satinder Chopra and Ritesh Kumar Sharma; #41664 (2015).
Search and Discovery.com
2015
Microseismic Monitoring of a Multi-Stage Fracture in the Bakken Formation, SE Saskatchewan; #51061 (2015)
Rob Kendall
Search and Discovery.com
... the 12, 3-component array centered on the Bakken. Figure 5. Microseismic events as shown in top view (left) and side view (right). A least squares...
2015
Following Seismic Depth Imaging Technology for the Mexican Oil Industry: Experiences and Lessons Learned; #70232 (2016)
Sergio Chávez-Pérez, Mario A. Centeno-Miranda, Douglas A. Gómez-Reyes, Liliana Vargas-Meleza
Search and Discovery.com
..., we focused on seismic imaging tools like RTM (reverse time migration) LSRTM (least squares RTM), layer-based and grid-based tomography, FWI (full...
2016
Relative Rock Properties An Alternative to Estimate Reservoir Properties from Seismic Data; #42177 (2018)
Alvaro Chaveste
Search and Discovery.com
... properties are computed as a linear combination of relative rock properties. The parameters of the linear equation are obtained from well-log data by least...
2018