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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,641 documents.
The Dynamic Interplay of Oil Mixing, Charge Timing, and Biodegradation in Forming the Alberta Oil Sands: Insights from Geologic Modeling and Biogeochemistry
Jennifer Adams, Steve Larter, Barry Bennett, Haiping Huang, Joseph Westrich, Cor van Kruisdijk
AAPG Special Volumes
... multivariate statistical methods (such as alternating least squares deconvolution methods).Finally, it is likely that the complexity of the petroleum systems...
2013
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
Sedimentation and Trapping Mechanism in Upper Miocene Stevens and Older Turbidite Fans of the Southeastern San Joaquin Valley, California
Bruce A. MacPherson
Pacific Section of AAPG
..., the best least squares fit for these data is a straight line — a further verification of Hubbell’s original observation. Oil Occurrence — Greeley...
1977
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
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
Compressibility, Porosity, and Permeability of Shales Involving Stress Shock and Loading/Unloading Hysteresis
Faruk Civan
Unconventional Resources Technology Conference (URTEC)
... be determined by the least-squares fit of experimental data on a logarithmic scale in the following form: f f ln Y ln A B ln X where X= o , Y...
2018
The control of hydrothermal dolomitization and associated fracturing on porosity and permeability of reservoir facies of the Upper Devonian Jean Marie Member (Redknife Formation) in the July Lake area of northeastern British Columbia
Jack Wendte, Alan Byrnes, David Sargent
CSPG Bulletin
... with advancing dolomite content up to 50%. The least squares regression line has a correlation coefficient of over 0.99. The sample population of 4431 full...
2009
Geophysical Evidence for Ancient Sea-Floor Spreading from Alpha Cordillera and Mendeleyev Ridge: Evolution of Arctic Ocean Basin
John K. Hall
AAPG Special Volumes
... ( = 3.15). A proposed history for the Amerasian basin since late Precambrian time suggests that the basin was affected by spreading at least once...
1973
Porosity--Depth Trends in Deeply Buried Upper Jurassic Reservoirs in the Norwegian Central Graben: An Example of Porosity Preservation Beneath the Normal Economic Basement by Grain-Coating Microquartz
Mogens Ramm,, Arne W. Forsberg, Jens S. Jahren
AAPG Special Volumes
...------------------------ high gamma-ray signals and poor reservoir quality at all depths (Table 1). Least-squares regression lines based on the porosity vs. depth...
1997
Permeability Evolution during Deformation of Siliciclastic Sandstones from Moab, Utah
O. Kwon, B. T. Ngwenya, I. G. Main, S. C. Elphick
AAPG Special Volumes
... four different effective confining pressures. The fitting was carried out using a nonlinear least-squares routine based on the Marquardt-Levenberg...
2005
Silica Diagenesis, I. Solubility Controls
Loretta Ann Williams , George A. Parks, David A. Crerar
Journal of Sedimentary Research (SEPM)
.... , --Alexander (1957). Two precipitated amorphous silicas. Solid lines are least-squares regression fits to redigitized data. +--Crerar and others (1981...
1985
The Importance of Sea-Level Fluctuations in the Formation of Linear Conglomerate Bodies; Carrot Creek Member of Cardium Formation, Cretaceous Western Interior Seaway, Alberta, Canada
Katherine M. Bergman, Roger G. Walker
Journal of Sedimentary Research (SEPM)
... a weighted least-squares procedure to calculate grid-point values from surrounding real data points. The data grid was then smoothed to produce the mesh...
1987
Classification of Large-Scale Subaqueous Bedforms: A New Look at an Old Problem-SEPM Bedforms and Bedding Structures
Gail M. Ashley, Symposium Chairperson
Journal of Sedimentary Research (SEPM)
... forms are dunes. FIG. 9B. A log-log plot of wind ripples () and eolian dunes () and the calculated least squares regression line compared to regression...
1990
Longshore Grain Sorting and Beach Placer Formation Adjacent to the Columbia River
Michael Zhenlin Li, Paul D. Komar
Journal of Sedimentary Research (SEPM)
..., differing only in the rate at which m decreases with the effective-density ratio (EDR). The empirical curve fitted by least-squares regression to our...
1992
Origin of Dolomite in the Phosphatic Miocene Hawthorn Group of Florida
John S. Compton , Donald L. Hall , David J. Mallinson , David A. Hodell
Journal of Sedimentary Research (SEPM)
... 0.003° 2 steps for 5 seconds per step to calculate the unit cell parameters a and c of dolomite by the least-squares cell refinement program LCLSQ...
1994
Measuring Sandstone Compaction from Modal Analysis of Thin Sections: How to Do It and What the Results Mean
S.N. Ehrenberg
Journal of Sedimentary Research (SEPM)
... is the least-squares fit to a larger set of Garn Formation data, including these points plus average core porosity values from 12 additional wells...
1995
Crustal Structure and Rift-Drift Evolution of the Newfoundland Basin: Chapter 16: North American Margins
Brian E. Tucholke, James A. Austin Jr., Elazar Uchupi
AAPG Special Volumes
... = 1.56, K = 1.26 and t = one-way travel time in sec). V0 and K were determined by least-squares fit to MCS sediment interval velocities determined...
1989
Basic Types of Submarine Slope Curvature
Erwin W. Adams , Wolfgang Schlager
Journal of Sedimentary Research (SEPM)
... and correlation coefficients from nonlinear least-squares regression (e.g., Davis 1986). Figure 3A shows a slope profile best described...
2000
Fracture Control of P-wave Azimuthal Anisotropy in a Laramide Basement-cored Anticline at Casper Arch, Wyoming: Insights from Correlations with Surface Analogs and Curvature Analyses
Duke Cooley, Eric Erslev
AAPG Special Volumes
... azimuthal normal move-out corrections at small spatial and temporal intervals. This improves seismic resolution by performing a linear least-squares fit...
2013
Fingerprints of Fluid Flow: Chemical Diagenetic History of the Jurassic Navajo Sandstone, Southern Utah, U.S.A.
Brenda Beitler, W.T. Parry, Marjorie A. Chan
Journal of Sedimentary Research (SEPM)
... a linear, least-squares fit of whole-rock chemistry, mineral composition, and mineral mass abundance (Parry et al. 1980). In addition to this regional sample...
2005
Seismic Geomorphology and Evolution of Submarine Channels from the Angolan Continental Margin
M.J.R. Gee, R.L. Gawthorpe, K. Bakke, S.J. Friedmann
Journal of Sedimentary Research (SEPM)
... an artificial surface (least squares, spline curvature) across the top of the channel valley (Fig. 3), taking into account any levee development...
2007
Paleohydrology of Ancient Dolomites: Geochemical Evidence
L. S. Land , M. R. I. Salem , D. W. Morrow
AAPG Bulletin
...------------------------------ Fig. 16. Least-squares regression lines for strontium content of four Allen Bay sections shown in Figure 17. Note consistent up-section increase...
1975
Structure of Upper Cenozoic Strata Beneath Kodiak Shelf, Alaska
Michael A. Fisher, Roland Von Huene
AAPG Bulletin
.... Structure contours of horizon C in Albatross basin. Location of map is shown in Figure 1. End_Page 1018------------------------------ least-squares...
1980
Tectonic Evolution of Gulf of Anadyr and Formation of Anadyr and Navarin Basins
Michael S. Marlow, Alan K. Cooper, Jonathan R. Childs
AAPG Bulletin
... plot were fit by least squares (Fig. 9). Except for the deepest refractors, each data set is highly linear. The resulting best-fit lines for Anadyr...
1983