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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,636 documents.
Porosity Variation in the Tensleep and its Equivalent the Weber Sandstone, Western Wyoming: A Log and Petrographic Analysis
J.E. Fox, P.W. Lambert, R.F. Mast, N.W. Nuss, R.D. Rein
Rocky Mountain Association of Geologists
... for a sandstone having a matrix velocity of 18,000 ft/sec (5,486 m/sec) ( A t equivalent - 55.5 psec). The solid line is the least squares fit line...
1975
Potential for carbon sequestration in the Hemlock Formation of the Cook Inlet basin, Alaska
Scott Pantaleone, and Shuvajit Bhattacharya
Environmental Geosciences (DEG)
...) regression technique rather than ordinary least squares (OLS) regression. The RMA regression is more appropriate than standard OLS regression when...
2020
Controls On Lower-Coastal-Plain Valley Morphology and Fill Architecture
C. R. Mattheus, A. B. Rodriguez
Journal of Sedimentary Research (SEPM)
... linear regression (least squares fit; P < 0.0001), and tributary incised valleys plot along the same regression line as coastal-prism incised valleys...
2014
Joint Spacings in Granitic Rocks of Eastern Kuala Lumpur Area, Peninsular Malaysia
Ng Tham Fatt
Geological Society of Malaysia (GSM)
... is calculated using the least squares method, and it is superimposed onto the bar charts (Fig. 7). The parameters a and b, and the coefficient of correlation (r...
1994
Reflections on Geostatistics and Stochastic Modeling
D. E. Myers
AAPG Special Volumes
... maximum likelihood nor weighted least squares do a good of job of detecting the different components in a nested model (or even the need for one...
2006
Borehole Electrical Images as a Reservoir Characterization Tool in the Merecure Formation, Guarico 13 Field, Eastern Venezuela
Helena Gamero, Carmen Contreras, Pieter Pestman, Akira Mizobe
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
...-yellow). 623 Figure 3. Diagram illustrating a dip computation. These are computed using a least-squares fit through a minimum of three selected...
2000
Petrology of the Shelburne and Barrington Passage Plutons, Southern Nova Scotia
H. Dean Rogers, Sandra M. Barr
Atlantic Geology
... LaTour, Nova Scotia. B.Sc. Honours thesis, Acadia University, Wolfville, Nova Scotia. YORK, D. 1969. Least squares fitting of a straight line...
1988
Superposed Late Paleozoic thermal events in the southwestern Meguma Terrane, Nova Scotia
R. D. Dallmeyer, J. D. Keppie
Atlantic Geology
... University, Wolfville, Nova Scotia. YORK, D. 1969. Least squares fitting of a straight line with correlated errors. Earth and Planetary Science Letters...
1988
Preservation of Autogenic Processes and Allogenic Forcings in Set-Scale Aeolian Architecture I: Numerical Experiments
Travis Swanson, David Mohrig, Gary Kocurek, Benjamin T. Cardenas, Matthew A. Wolinsky
Journal of Sedimentary Research (SEPM)
..., and are found by a nonlinear least-squares fitting of an-exponential-growth-to-saturation model, , where the variables s and represent the time-series...
2019
40Ar/39Ar and U-Pb mineral ages from the Brookville Gneiss: implications for terrane analysis and evolution of Avalonian basement in southern New Brunswick
R. D. Dallmeyer, R. Doig, R. D. Nance, J. B. Murphy
Atlantic Geology
..., D. 1969. Least squares fitting o f a straight line with correlated errors. Earth and Planetary Science Letters, 5, pp. 320-324...
1990
Photogrammetry of sequence and bioherm morphology in the Paradox Formation, Utah, U.S.A.: A test of the coherence of Pennsylvanian (Moscovian) glacio-eustatic sea-level change
Elizabeth Allen Johnson, M. Elliot Smith, Gary L. Gianniny, Paul J. Umhoefer
Journal of Sedimentary Research (SEPM)
... in overlapping images, and uses a least-squares regression to calculate camera positions, from which high-resolution 3D models of the target object...
2021
Origin of Transverse Faulting, Rocky Mountain Front Ranges, Canmore, Alberta
Ian W. Moffat,, John H. Spang
CSPG Bulletin
... least-squares cylindrical fold axes. End_Page 155------------------------ that transverse faults and minor reverse faults, as well as one...
1984
The Rise and Fall of Eustasy
Christopher G. St. C. Kendall, Ian Lerche
Special Publications of SEPM
... is correct: the parameters are chosen to give a minimum least-squares mismatch to the crustal curve. The error limits of this method are not estimated...
1988
Fast and Reliable Estimates of Low Permeabilities by the Full-Immersion Pressure-Pulse Decay
Michael J. Hannon Jr.
Unconventional Resources Technology Conference (URTEC)
... at a coarse spatial resolution to the data with a weighted-least-squares minimization algorithm. Estimates are updated with increasing spatial resolution...
2017
Controls on Reservoir Heterogeneity in the Three Bar Devonian Chert Reservoir, Andrews County, Texas
Stephen C. Ruppel, Susan D. Hovorka
West Texas Geological Society
.... Cross plot of porosity versus permeability data from core analysis. Line is least squares regression of core plug analysis data, which are taken...
1990
Pore-scale Evaluation of Nuclear Magnetic Resonance Measurements in Organic-Rich Mudrocks Using Numerical Modeling
Saurabh Tandon, Zoya Heidari, Hugh Daigle
Unconventional Resources Technology Conference (URTEC)
... the T2 distribution in CPMG pulse sequence by inversion of magnetization decay using the zeroth order least squares curve fitting scheme (Aster et al...
2017
Evaluating the Use of Average Composite Sections and Derived Correlations in the Graphic Correlation Technique
Kenneth C. Hood
Special Publications of SEPM
... is Miller 1977 who recommended that LOCs be positioned subjectively by operator judgment rather than by least squares regression to accommodate greater...
1995
Chapter 3: Crystalline Basement: The Foundations of Western Canada Sedimentary Basin
G. Ross, R. A. Stephenson
CSPG Special Publications
..., v. 13, p. 543–603. Kanasewich, E.R. and Chiu, S.K.L. 1985. Least squares inversion of spatial seismic refraction data. Bulletin Seismological Society...
1989
Burial and Temperature History of Gas Generation from Coaly Organic Matter in the Late Cretaceous Mesaverde Formation and Associated Rocks in the Deeper Portions of the Wind River Basin, Wyoming
C. E. Barker, B. L. Crysdale
Wyoming Geological Association
... versus depth for wells in the WHCS data base through 1991, Wind River Basin, Wyoming. The solid line shows a least squares regression fit for depth...
1993
Causes of Multiple Magnetizations in the Devonian Upper Member, Wabamun Group, Alberta, Canada: Fluid Flow and Diagenesis?
M. T. Cioppa, I. S. Al-Aasm, D. T. A. Symons, K. P. Gillen
AAPG Special Volumes
... Canada Sedimentary Basin: Canadian Society of Petroleum Geologists and Alberta Research Council, p. 203220.Kirschvink, J. L., 1980, The least-squares...
2004
Application of Lopatin's Method to Determine Burial History, Evolution of the Geothermal Gradient, and Timing of Hydrocarbon Generation in Cretaceous Source Rocks in the San Juan Basin, Northwestern New Mexico and Southwestern Colorado
Wendell A. Bond
Rocky Mountain Association of Geologists
... the line shown in Figure 3 is a least squares fit to the resulting loglog plot of l versus Ro. For comparison, T I Figure 3 also shows the line taken from...
1984
Isotopic Ages and Stratigraphic Control of Mesozoic Igneous Rocks in Japan
Ken Shibata , Tatsuro Matsumoto , Takeru Yanagi , Reiko Hamamoto
AAPG Special Volumes
... at the island arc: Kyushu Univ. Fac. Sci. Mem. ser. D, v. 22, p. 37-98. York, D., 1966, Least-squares fitting of a straight line: Canadian Jour. Phys., v. 44, p...
1978
Seismic Refraction and Reflection Studies in the Timor-Aru Trough System and Australian Continental Shelf: Convergent Margins
R. S. Jacobson , G. G. Shor Jr. , R. M. Kieckhefer , G. M. Purdy
AAPG Special Volumes
... variations from a sloping datum were in the second layer. Travel times were fitted to straight lines by a least-squares solution that requires that reverse...
1979
Real-Time Hydraulic Fracture Optimization Based on the Integration of Fracture Diagnostics and Reservoir Geomechanics
Panagiotis Dalamarinis, Paul Mueller, Dale Logan, Jason Glascock, Stephen Broll
Unconventional Resources Technology Conference (URTEC)
... geometries, a Ridge Regression model was fit to the data. The main advantage of Ridge Regression over Ordinary Least Squares (ODL...
2020
A Study of the Relations of Depth, Porosity and Clay Mineral Orientation in Pennsylvanian Shales
Mack Gipson, Jr.
Journal of Sedimentary Research (SEPM)
... estimations of the degree of association between two variables, or least squares methods. Correlation coefficients, simple and partial, were employed...
1966