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The AAPG/Datapages Combined Publications Database
Showing 1,680 Results. Searched 200,357 documents.
Abstract: Contouring Geologic Data from Arbitrary Points, by D. R. McDonald, C. J. R. Braithwaite, A. Jawad Ali; #90972 (1976).
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1976
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
Memory-efficient frequency-domain least-squares RTM using low-rank Greens functions via randomized SVD
Daniel E. Revelo, Reynam C. Pestana, Diego F. Barrera, Rodrigo S. Santos
International Meeting for Applied Geoscience and Energy (IMAGE)
...Memory-efficient frequency-domain least-squares RTM using low-rank Greens functions via randomized SVD Daniel E. Revelo, Reynam C. Pestana, Diego F...
2024
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
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: Reverse Time Adjoint and Reverse Time Inverse Migration, by H. Liu andY. Luo, #90188 (2014)
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2014
ABSTRACT: Assessment of In-Situ Gas Saturation and Permeability From Logs in the Hugoton Field Based on the Physics of Mud-Filtrate Invasion; #90048 (2005)
Carlos Torres-Verdin, Faruk O. Alpak, Bovan George, Ray Sorenson, Grant Robertson
Search and Discovery.com
... variations of gas saturation away from the borehole wall. A least-squares constrained optimization method is employed to solve the inverse problem. Array...
2005
ABSTRACT: 1-D Inversion and Analysis of Marine Controlled-Source Electromagnetic Data; #90061 (2006)
Niels B. Christensen, Kevin Dodds, and Ian Bulley
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.... 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: Image Enhacement After Migration; #90174 (2014)
John C. Bancroft, Thais Guirigay, and Helen Isaac
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.... The second reason for deconvolution after migration is provide by Least Squares Migration (LSM). LSM provides a true inversion of the imaging process...
2014