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The AAPG/Datapages Combined Publications Database
Showing 1,462 Results. Searched 196,217 documents.
An Integrated Approach to Reservoir Characterization in the Illinois Basin: Multidisciplinary Studies
D. F. Oltz, H. E. Leetaru, B. Seyler, S. T. Whitaker
AAPG Special Volumes
... correlation coefficient (r) of 0.83 (fig. 11). The data exhibit considerable scatter or deviation from the least-squares regression line. More than a 5...
1991
Penecontemporaneous Dolomitization in Sabkha Faishakh, Qatar: Evidence from Changes in the Chemistry of the Interstitial Brines
Leslie V. Illing , John C. M. Taylor
Journal of Sedimentary Research (SEPM)
.... The slope of the line calculated by least squares for the sabkha samples is 0.81, with a correlation coefficient of 0.91. The intercept on the sulfate...
1993
Downstream Changes in the Lithology and Grain Size of Fluvial Gravels, the Watarase River, Japan: Evidence of the Role of Abrasion in Downstream Fining
Yoshinori Kodama
Journal of Sedimentary Research (SEPM)
... to Sternberg's law (1875). The rate of size diminution obtained by least-squares regression is D = 65e-0.089X, where D is median diameter in mm at X km...
1994
Isotopic and Elemental Geochemistry of Black Sea Sediments: Geochemistry
John A. Cooper , E. Julius Dasch , Maureen Kaye
AAPG Special Volumes
.... 1458-1460. York, Derek, 1969, Least squares fitting of a straight line with correlated errors: Earth and Planetary Sci. Letters, v. 5, no. 5, p...
1974
Bed-Thickness Structure of Multi-Sourced Ramp Turbidites: Devonian Brallier Formation, Central Appalachian Basin
Carl N. Drummond
Journal of Sedimentary Research (SEPM)
... the direction of curvature of exponential distributions. Visual inspection coupled with least-squares analysis readily distinguishes the underlying form...
1999
Enhanced Sediment Scavenging Due to Double-Diffusive Convection
Jeffrey D. Parsons , Macelo H. Garcia
Journal of Sedimentary Research (SEPM)
... this study and Green (1987) were fitted using a least-squares technique. The experimental results, along with the curve-fit, are shown in Figure 7. The fit...
2000
Resources for Paleoceanographic and Paleoclimatic Analysis: A 6,700-Year Stratigraphy and Regional Radiocarbon Reservoir-Age (ΔR) Record Based on Varve Counting and 14C-AMS Dating for the Santa Barbara Basin, Offshore California, U.S.A.
Arndt Schimmelmann, Carina B. Lange, E. Brendan Roark, B. Lynn Ingram
Journal of Sedimentary Research (SEPM)
... for that particular level in the core (Table 2). The error in the ΔR values is based on the least-squares difference of the 14C error of the equivalent marine model...
2006
Expanding Role of Computer in Geology
E. L. Dillon
AAPG Bulletin
... by the least squares method. The degree or "order" of the trend surface indicates the largest exponent in the equation for the surface, and thus...
1967
Principal Stress Ratios in Cretaceous Limestones from Texas Gulf Coast
M. Friedman , H. C. Heard
AAPG Bulletin
.... It is apparent however, when a least-squares line is passed through the midpoints of the data bars (Table 2; Figs. 2, 3). DISCUSSION OF RESULTS Although...
1974
Gas-Hydrate Horizons Detected in Seismic-Profiler Data from the Western North Atlantic
Brian E. Tucholke , George M. Bryan , John I. Ewing
AAPG Bulletin
... used is Vp = 1.58 + 1.24 t/2 km/sec, where t is the two-way travel (reflection) time; this velocity function is a least squares fit for sonobuoy...
1977
Rubidium-Strontium Minimum Ages of Sedimentation, Uranium Mineralization, and Provenance, Morrison Formation (Upper Jurassic), Grants Mineral Belt, New Mexico
Moon J. Lee , Douglas G. Brookins
AAPG Bulletin
..., Uranium deposits of the Grants region, New Mexico: Wyoming Geol. Assoc. Earth Sci. Bull., v. 5, p. 3-12. York, D., 1969, Least squares fitting...
1978
Analysis of Gravity Anomaly Over Coral-Reef Oil Field: Wilfred Pool, Sullivan County, Indiana
Stephen W. Dana
AAPG Bulletin
... of Wilfred pool. End_Page 408------------------------------ A plot of averages against distance was made, and a least-squares analysis calculated...
1980
Crustal Structure in Gulf of Mexico from OBS Refraction and Multichannel Reflection Data
A. K. Ibrahim, J. Carye, G. Latham, R. T. Buffler
AAPG Bulletin
... by least squares, and the apparent velocities were calculated at each end of the profile. The standard deviation with respect to least square fitted lines...
1981
Source and Migration of Light Hydrocarbons Indicated by Carbon Isotopic Ratios
R. H. Reitsema, A. J. Kaltenback, F. A. Lindberg
AAPG Bulletin
... of gas from canned cuttings, although there were some significant exceptions. The trend line for head space in canned cuttings, based on the least-squares...
1981
Model to Evaluate Exploration Strategies
David Austin Jones, Neal A. Buck, Jack Harris Kelsey
AAPG Bulletin
... of exploration. Equation 3 is used to calculate the parameters Fi(w), Fi(^infinity), and C simultaneously by fitting a least squares curve to the time series...
1982
Effects of Oil and Gas Accumulation on Water Movement: GEOLOGIC NOTES
Richard E. Chapman
AAPG Bulletin
... pressure measurements. Data plotted as least squares correlation lines over approximate range of each set of data. Correlation coefficient is statistically...
1982
Sediment Thickness and Depth to Basement in Western North Atlantic Ocean Basin
Brian E. Tucholke , Robert E. Houtz , William J. Ludwig
AAPG Bulletin
... critical refractions as well. A convenient method for generalizing interval velocities involves the use of polynomials fit by least-squares to interval...
1982
Statistical Appraisal of Seismic Prospects in Louisiana-Texas Outer Continental Shelf
John C. Davis , John W. Harbaugh
AAPG Bulletin
... be found by least-squares methods, which ensure that the sum of the squared differences between the predictions of BOE's and the recoverable...
1983
Pristane, Phytane, and Lower Molecular Weight Isoprenoid Distributions in Oils
Harold A. Illich
AAPG Bulletin
... that a large amount of the pristane is directly related to the amount of phytane present. It is noteworthy that the lines of best fit (least-squares method...
1983
Thermal History of Michigan Basin
Karen Rose Cercone
AAPG Bulletin
... by linear least squares analysis: Master's thesis, University of Michigan, Ann Arbor, 95 p. Dorr, J. A., Jr., and D. F. Eschman, 1971, Geology of Michigan...
1984
The Ubiquitous Overbid
R. E. Megill, R. B. Wightman
AAPG Bulletin
... of Mexico, are omitted from the least-squares fit of the data points shown on Figure 4. The correlation coefficient for the trend line plotted is 0.65...
1984
Oriented Core: Its Use, Error, and Uncertainty
R. A. Nelson , L. C. Lenox , B. J. Ward, Jr.
AAPG Bulletin
... for four zones from one oriented core. The best-fit method used in this study was a linear least-squares approach. In zones of distinctly nonlinear data...
1987
Petrography and Reservoir Physics II: Relating Thin Section Porosity to Capillary Pressure, the Association Between Pore Types and Throat Size (1)
CATHERINE A. MCCREESH , ROBERT EHRLICH , and STERLING J. CRABTREE
AAPG Bulletin
... shape of the distributions. These relationships, based on least squares regression, are averages, and predicted saturation values generally...
1991
Determination of the stable isotope composition and total dissolved solids of Athabasca oil sands reservoir porewater: Part 1. A new tool for aqueous fluid characterization in oil sands reservoirs
Benjamin R. Cowie, Bruce James, Michael Nightingale, and Bernhard Mayer
AAPG Bulletin
... to the determination of water isotope compositions. A least-squares regression line was generated for the TDS– system, and the equation was solved using the value...
2014
Geophysical characterization of a leachate plume from a former municipal solid waste disposal site: A case study on Norman landfill
Md. Iftekhar Alam, Andrew Katumwehe, and Estella Atekwana
AAPG Bulletin
... downloaded from Syscal and inverted using Res2DInv software to obtain an acceptable resistivity section using a least-squares inversion technique (Loke...
2022