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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,636 documents.
Revised stratigraphy, regional correlations and new bentonite radiometric ages for the Albian Loon River Formation, Fort St. John Group, northwestern Alberta
B. Hathway, G. Dolby, D. H. McNeil, S. L. Kamo, M. T. Heizler, N. Joyce
CSPG Bulletin
... in Petra® using the ‘highly connected features (least squares)’ option. Figure 4. Structure contour maps for (A) TS1. Solid blue line marks the zero...
2013
Fast Probabilistic Forecasting of Oil Production using Monte Carlo Simulations on Data Driven Acquisition of Decline-Curve Parameter Distributions
V.B.K. Chavali, W. J. Lee
Unconventional Resources Technology Conference (URTEC)
... that rely on clean data as well a simple least squares method to fit a linear model through as much of the data as possible resulting in a bad fit and hence...
2021
Exploitation of Multizones by Water Flooding in the Daqing Oil Field: Chapter 6
Jin Yusun, Yang Wanli, Wang Zhiwu
AAPG Special Volumes
... displacement efficiency (ultimate and without water cut) obtained in laboratory simulation of natural cores and artificial cores by the least-squares method...
1989
Pore Networks in Holocene Carbonate Sediments
Paul Enos, L. H. Sawatsky
Journal of Sedimentary Research (SEPM)
... time are presented in Figure A-1. A simple computer program was written to obtain logarithms, plot the values, calculate the least squares fit...
1981
Chemical and Sr-Isotopic Variations During Diagenesis of Miocene Siliceous Sediments of the Monterey Formation, California
Hannes K. Brueckner, Walter S. Snyder
Journal of Sedimentary Research (SEPM)
... of 0.707945. The decay constant used for Rb87 is 1.42 x 10-11/yr. Simple least-squares lines were fitted to the linear arrays on Rb-Sr isochron...
1985
Pervasive Subsurface Dolomitization of the Nisku Formation in Central Alberta
Hans G. Machel, James H. Anderson
Journal of Sedimentary Research (SEPM)
... per sample, excluding the primary peak, were used. Calculations were performed using a FORTRAN, weight-average, least-squares regression program...
1989
Characteristics, Distribution and Origin of Porosity in Shelf Dolostones: Burlington-Keokuk Formation (Mississippian), U.S. Mid-Continent
Philip W. Choquette, Ann Cox, William J. Meyers
Journal of Sedimentary Research (SEPM)
...-count analysis. A) Percent total porosity versus molds and rugs percent of total porosity, with least-squares lines and 1 SD bands for the two populations...
1992
Illite/Smectite Formation and Potassium Mass Transfer During Burial Diagenesis of Mudrocks: A Study from the Texas Gulf Coast Paleocene-Eocene
D. N. Awwiller
Journal of Sedimentary Research (SEPM)
... depth (Fig. 4). Percent illite in I/S varies from 25-30% in the least illitic samples to 85-90% in the most illitic samples (Fig. 5), and I...
1993
Simulating the Three-Dimensional Distribution of Sediment Units in Braided-Stream Deposits: SPECIAL SECTION: AQUIFER STRATIGRAPHY
Erik K. Webb
Journal of Sedimentary Research (SEPM)
... relationships there is variability about the fitted least-squares regression line. BCS-3D allows the user to define the standard deviation of error...
1994
Statistical Analysis of Turbidite Cycles in Submarine Fan Successions: Tests for Short-Term Persistence
Chengsheng Chen, Richard N. Hiscott
Journal of Sedimentary Research (SEPM)
... correlation, and Pearson's correlation) and the least-squares method. The utility and power of these methods are confirmed, below, by our results...
1999
Establishing a Regional Geologic Framework for Carbon Dioxide Sequestration Planning: A Case Study
Erik R. Venteris, Ronald R. Riley, James McDonald, Lawrence H. Wickstrom, James A. Drahovzal, John A. Harper
AAPG Special Volumes
... calculation, a variety of sources were used to obtain a solution for equation 2. Salinity was modeled using a least-squares relationship between measured...
2009
Downstream Changes of Alpine Zircon Fission-Track Ages in the Rhone and Rhine Rivers
Matthias Bernet,, Mark T. Brandon, John I. Garver, Brandi Molitor
Journal of Sedimentary Research (SEPM)
... component of the mixture. We use a constrained weighted least-squares method to find best-fit estimates for the unknown proportions j. The probability...
2004
Elemental and Oxygen Isotope Composition of Early Jurassic Belemnites: Salinity vs. Temperature Signals
Idoia Rosales, Sergio Robles, Santiago Quesada
Journal of Sedimentary Research (SEPM)
...) represented in Figure 6. The total number of observations is n = 67. The lines represent linear least-squares fit regressions. In left side...
2004
Exploration for Oil Accumulations in Entrada Sandstone, San Juan Basin, New Mexico
Richard R. Vincelette , William E. Chittum
AAPG Bulletin
... to determine the base o the sand. The base was then smoothed, using a least-squares fit, and the top of the Entrada adjusted accordingly...
1981
Thermal Maturation by Vitrinite Reflectance of Woodford Shale, Anadarko Basin, Oklahoma
Brian J. Cardott , Michael W. Lambert
AAPG Bulletin
... is a logarithmic function with depth (Dow, 1977; Dow and O'Connor, 1982). The least-squares regression plotted in Figure 5B is used to predict...
1985
Interpretation of Crustal Structure from Regional Gravity Anomalies, Ouachita Mountains Area and Adjacent Gulf Coastal Plain
J. M. Kruger , G. R. Keller
AAPG Bulletin
... analysis of least squares polynomial surfaces with application to gravity data in the Pedregosa basin area: PhD dissertation, University of Texas...
1986
Analysis of Fluid and Heat Regimes in Sedimentary Basins: Techniques for Use with Large Data Bases
S. Bachu, C. M. Sauveplane, A. T. Lytviak, Brian Hitchon
AAPG Bulletin
... (k) from drill-stem tests or core and the porosity (n) obtained from interpretation of geophysical logs. The constants (C, a) are found by the least...
1987
Balanced Section in Thrust Belts Part 1: Construction
Declan G. De Paor
AAPG Bulletin
.... For example, straight contacts may be interpolated between data points by least-squares Fig. 13. (a) Illustration of correspondence between strike...
1988
Marine Geology of Sohm Basin, Canadian Atlantic Margin
Cynthia J. Ebinger , Brian E. Tucholke
AAPG Bulletin
..., 1982). Prior to transformation to the spectral domain, we used a least-squares linear regression to remove long-wavelength trends, interpolated data...
1988
Thermal Histories and Hydrocarbon Generation: Example from Utah-Wyoming Thrust Belt
Dave Deming , David S. Chapman
AAPG Bulletin
..., in press). Corrected BHTs are shown as a function of depth in Figure 4. Average geothermal gradients, derived from least-squares fits to the corrected BHT...
1989
Textural and Compositional Variability Across Littoral Segments of Lake Tanganyika: The Effect of Asymmetric Basin Structure on Sedimentation in Large Rift Lakes
Michael J. Soreghan , Andrew S. Cohen
AAPG Bulletin
... by site. Regression equations are listed in the key for each site calculated by least-squares method. mgs = mean grain size; wd = water depth. Note...
1996
Contrasting styles of reservoir development in proximal and distal chert facies: Devonian Thirtyone Formation, Texas
Stephen C. Ruppel, Roger J. Barnaby
AAPG Bulletin
... of neutron log porosity to core porosity. Comparison of a least squares regression, best fit to the data (solid line) and a 1:1 relationship between...
2001
Quantitative characterization of shales within tidally influenced fluvial valley fill deposits of the Ferron Sandstone, eastern Utah: Implications for hydrocarbon exploration
Kivanc Biber, Shuhab D. Khan, Janok P. Bhattacharya, Mark D. Barton, and Craig L. Glennie
AAPG Bulletin
... cloud data were merged using surveyed control points combined with a routine that uses least-squares to iteratively fit surfaces generated from...
2017
Validating novel boundary conditions for three-dimensional mechanics-based restoration: An extensional sandbox model example
Benjamin P. Chauvin, Peter J. Lovely, Joseph M. Stockmeyer, Andreas Plesch, Guillaume Caumon, and John H. Shaw
AAPG Bulletin
..., and J.-M. Morvan, 1997, A least-squares method for multisurface unfolding: Journal of Structural Geology, v. 19, no. 5, p. 735–743, doi...
2018
The magnetic fabric of the Wolfcamp shale, Midland Basin, west Texas: Understanding petrofabric variability, hydrocarbon associations, and iron enrichment
Gerhard W. Heij, and R. Douglas Elmore
AAPG Bulletin
...; however, more orientations provide over determinacy of the matrix diagonal, which allows calculation of tensor fits by least squares methods (see Girdler...
2019