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The AAPG/Datapages Combined Publications Database
Showing 1,463 Results. Searched 196,121 documents.
NIAGARAN REEFS OF NORTHERN MICHIGAN, PART II: RESOURCE APPRAISAL
D. Gill
Journal of Petroleum Geology
.... The parameters were estimated both by non-linear least-squares curve fitting, and by a heuristic "back-forecasting" calibration procedure. The DECs...
1994
Abstract: Contouring Geologic Data from Arbitrary Points, by D. R. McDonald, C. J. R. Braithwaite, A. Jawad Ali; #90968 (1977).
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1977
Abstract: Statistical regression models for predicting landslide hazard
C. F. Chung
Atlantic Geology
... subareas are defined where each subarea contains a unique combination of the map patterns. Weighted least squares techniques are proposed...
1995
Grain Orientation in Beach Sands: A Possible Means for Predicting Reservoir Trend
R. H. Nanz
Journal of Sedimentary Research (SEPM)
... pattern in a polished or thin section and data are plotted in a circular histogram. A mean direction is computed by a least-squares method, spread...
1955
ABSTRACT: Absolute Elemental Concentrations Estimated from Geochemical Well Logging Using Neutron-Induced Gamma-Ray Spectrometry and a Geological Model, by James A. Grau and Michael M. Herron; #91038 (2010)
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2010
Abstract: Stable-Isotopic Comparison of a Late Eocene Archaeocete Whale, Basilosaurus cetoides, to a Modern Cetacean, Tursiops truncatus
Edwin W. Emmer , Dean A. Dunn
GCAGS Transactions
..., Mississippi, provided oxygen isotopic values for cetacean bone phosphate, carbonate cement, and structural carbonate. The least-squares regression...
1997
ABSTRACT: Cooperative Inversion of Geophysical Data, by Larry Lines, Alton K. Schultz, and Sven Treitel; #91035 (2010)
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2010
Correlation and Regression Analysis: Part 6. Geological Methods
T. C. Coburn
AAPG Special Volumes
... the regression line. Two consequences of the least squares approach for the determination of the parameters a and b are that the sum of these residuals...
1992
ABSTRACT: Computer-Aided Geometric Modeling of Geologic Surfaces, by H. Schaeben, S. Auerbach; #91003 (1990).
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1990
Abstract: The George & Stiles Method of Determining Porosity Cutoffs: A Computer Program, by K. C. Powers and J. J. Reeves; #91004 (1991)
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1991
Distribution of Hydrocarbons in Three Dimensions: ABSTRACT
John C. Davis
AAPG Bulletin
... is a least-squares expression of the relation between the dependent variable and the spatial coordinates. In practice, a polynomial expansion...
1969
Abstract: Seismic Data Inversion Using Geologic Constraints, by R. T. Vest; #91018 (1992).
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1992
ABSTRACT: Transformation of Geochemical Log Data to Mineralogy Using Genetic Algorithms, by J. H. Fang, C. L. Karr, D. A. Stanley; #91020 (1995).
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1995
KOALA--Minicomputer Log Analysis System for Geologists: ABSTRACT
John H. Doveton, Harold W. Cable
AAPG Bulletin
..., or least-squares matrix algorithms, depending on the degree of determinancy prescribed by the number of components as related to number of logs...
1979
Gravity Investigation of Suspected Silurian Reef in North-Central Ohio: ABSTRACT
William Owen Bolla
AAPG Bulletin
... was set at 200 ft (61 m) to insure detection of the anomaly. The gravity residual was calculated by least squares analysis on an IMB 370 computer...
1981
Coal Quality and Overburden Reconstruction of Upper Cretaceous and Tertiary Coal-Bearing Formations, Plains Area, Alberta: ABSTRACT
John R. Nurkowski
AAPG Bulletin
... investigated. A least-squares regression analysis of all data, regardless of formation, of calorific value, CV (Kcal/kg), corrected to a moist mineral matter...
1982
Tuscarora Sandstone (Silurian), Central Pennsylvania: Preliminary Quantitative Grain Shape Analyses of Cotter's (1982) Facies--Fluvial, Estuarine, Beach, and Marine(?) Shelf: ABSTRACT
James M. Parks, Robert A. Gallagher, Edward Cotter
AAPG Bulletin
... a calculated "center of gravity" to a least squares best fit with an empirical "reference shape"; and 36 equal-angle spaced radials are calculated...
1982
Marine Geophysical Measurements in Central Puget Sound, Washington: ABSTRACT
Mark L. Holmes, J. D. MacQueen, R. E. Sylwester
AAPG Bulletin
... the Cascade Range foothills to Hood Canal. North of this gradient is a -129 mgal Bouguer gravity minimum centered over Lake Washington. A least squares...
1982
Crustal Structure of South Florida Bank Derived from Ocean Bottom Seismometer Refraction Profiles: ABSTRACT
Joseph O. Ebeniro, William P. O'Brien, Jr., Subir K. Chatterjee
AAPG Bulletin
... arrival picks were made and least squares lines were fitted to the picks to obtain the apparent velocities and intercept times for the layers. Using...
1984
Sequential Restoration and Unstraining of Structural Cross Sections: Applications to Extensional Terranes
S. Gregg Erickson, Stuart Hardy, and John Suppe
AAPG Bulletin
... block produce a least-squares minimized best fit. After attaining a best fit of rigid elements, continuity is regained by moving initially coincident...
2000
Sequential restoration and unstraining of structural cross sections: Applications to extensional terranes: Reply
S. Gregg Erickson, Stuart Hardy, John Suppe
AAPG Bulletin
... is used and is referred to Eulerian, rotated coordinates. A rotation introduced by this strain exists in addition to the least-squares rotations...
2002
Abstract: Near Surface Characterization Using TDEM Over Marmul Area, South Oman, by A. Al-Shukeili, H.M. El-Kaliouby, S. Mahrooqi, and A.S. Al-Ismaily, #90188 (2014)
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2014
ABSTRACT: 1-D Inversion and Analysis of Marine Controlled-Source Electromagnetic Data; #90061 (2006)
Niels B. Christensen, Kevin Dodds, and Ian Bulley
Search and Discovery.com
.... Inversion is carried out with multi-layer models and L1-optimization and with 4-layer models in the least-squares sense. A general analysis of the resolution...
2006
Abstract: Statics and Trace Regularization; #90211 (2015)
Robert Ferguson
Search and Discovery.com
... of seismic data is investigated by treating wavefield extrapolation as a least-squares inversion problem. Weighed, damped leastsquares is then used...
2015
Abstract: STRUCTURAL ANALYSIS OF FRACTURE AND VEIN VARIATIONS NEAR FAULTS IN UTICA BLACK SHALE, MOHAWK VALLEY, NEW YORK STATE; #90249 (2016)
Alex O'Hara
Search and Discovery.com
... bedrock through the use of multilinear multivariate and partial least squares statistical analyses. These characteristics include average fracture...
2016