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The AAPG/Datapages Combined Publications Database
Showing 1,463 Results. Searched 196,121 documents.
Lateral Fluid Flow in a Compacting Sand-Shale Sequence: South Caspian Basin
John D. Bredehoeft , Rashid D. Djevanshir , Kenneth R. Belitz
AAPG Bulletin
... is sometimes referred to as "Athy's law." We have made a least-squares fit of an exponential function to the porosity-depth data: EQUATION (1...
1988
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
A general model for growth trajectories of linear carbonate platforms
Nicolas Goudemand,, Pulkit Singh, Jonathan L. Payne
Journal of Sedimentary Research (SEPM)
.... The observed trajectories of the platform margins with respect to time in each of these examples can be fitted using a nonlinear least squares fit (nls...
2020
Reservoir Modeling and Composition Simulation of Primary Depletion and Carbon Dioxide Flooding of a Small Pennsylvanian Carbonate Mound Complex, Runway Field, Paradox Basin, Utah, Volume 1-3 (OFR-421)
Wilmer E. Culham, Douglas M. Lorenz
Utah Geological Survey
..." (including datum shifts) from the two travel-time grids, simple polynomial surfaces (orders 1,2,3,4) were fitted by least-squares to the grids. 2...
2003
From Reservoir Characterization to Reservoir Monitoring: An Integrated Workflow to Optimize Field Development Using Geochemical Fingerprinting Technology
Faye Liu, Jiang Wu, Muqing Jin, Douglas L. Hardman, Dave Cannon
Unconventional Resources Technology Conference (URTEC)
... extracted from the rock samples as end members and the produced oil samples as the target. Such a calculation is performed using linear least-squares...
2020
Climatic Conditions and Hydrological Change Recorded in a High-Resolution Stable-Isotope Profile of a Recent Laminated Tufa on a Subtropical Island, Southern Japan
Akihiro Kano, Risa Hagiwara, Tatsuya Kawai, Masako Hori, Jun Matsuoka
Journal of Sedimentary Research (SEPM)
...-term trend for a decrease in δ18Oc (Fig. 3) translates to a long-term increase in water temperature. The line generated by the least-squares method...
2007
Integrated rock classification in carbonate formations based on elastic and petrophysical properties estimated from conventional well logs
Mehrnoosh Saneifar, Roy Conte, Clotilde Chen Valdes, Zoya Heidari, and Michael C. Pope
AAPG Bulletin
... Symposium, Corpus Christi, Texas, July 6–9, 1982, p. 12–27.Levenberg, K., 1944, A method for the solution of certain problems in least squares...
2015
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
AAPG Memoir 76, Chapter 18: Velocity Estimation for Pore-Pressure Prediction
David W. Bell
AAPG Special Volumes
... on a linear scale (Figure 6B) and as dτ on a semi-log plot (Figure 6A). Coefficients for the curves were determined from least-squares fits of the original...
2001
Application of seismic attributes to delineate the geological features of the Malay Basin
Abd AlSalam Almasgari, Mohamed Elsaadany, Abdul Halim Abdul Latiff, Maman Hermana, Abdul Hadi Bin Abd Rahman, Ismailalwali Babikir, Qazi Sohail Imran, Nicholas Fogne Appiah, Teslim Oyediran Adeleke
Geological Society of Malaysia (GSM)
..., 58(PB), 555–78. Puryear, Charles I., John P. Castagna, Oleg Portniaguine & Carlos Cobos, 2012. Constrained Least-Squares Spectral Analysis...
2020
An Interpreter's Guide to Improvements in Depth Imaging Through Model-Based Velocity Estimation and Refinement
Andy Furniss
Indonesian Petroleum Association
... be minimised. An important feature of global tomography is that errors are simultaneously solved using least squares to minimise the error in traveltime across...
2000
An Interpreter's Guide to Improvements in Depth Imaging through Model-Based Velocity Estimation and Refinement
Andy Furniss
Petroleum Exploration Society of Australia (PESA)
... undergone horizon-based tomography. simultaneously solved using least squares to minimise the error in traveltime across the whole model. Hyperbolic Update...
1999
Core Magnetostratigraphy: Chron 33r in the Southern Alberta Plains
Taslima Anwar, Andrew J. Mumpy, Dunia Blanco, Vadim A. Kravchinsky, Octavian Catuneanu
CSPG Bulletin
... Kauffman (eds.). Geological Association of Canada, no. 39, p. 397–434. Kirschvink, J.L. 1980. The least-squares line and plane and the analysis...
2017
Structure of the Outer Convergent Margin Off Kodiak Island, Alaska, from Multichannel Seismic Records: Convergent Margins
Roland Von Huene
AAPG Special Volumes
... slope and mid-slope terrace areas are summarized by a least-squares curve (Fig. 4, dashed line), shown with a similar curve based upon more data...
1979
Strontium Isotope Compositions of Non-marine Carbonate Rocks from the Beacon Supergroup of the Transantarctic Mountains
Gunter Faure, Peter J. Barrett
Journal of Sedimentary Research (SEPM)
... rocks: A summary--2: New Zealand Jour. Geology and Geophysics, v. 8, No. 2, p. 221-230. YORK, D., 1966, Least squares fitting of a straight line. Canadian...
1973
Determination of the stable isotope composition and total dissolved solids of Athabasca oil sands reservoir porewater: Part 2. Characterization of McMurray Formation waters in the Suncor–Firebag field
Benjamin R. Cowie, Bruce James, Michael Nightingale, and Bernhard Mayer
AAPG Bulletin
... of the formation water. Care should be taken in interpretation of mixing lines generated by this method. Least-squares regression may not be entirely...
2014
The gas isotope interpretation tool: A novel method to better predict production decline
Li Gao, Sheng Wu, Andrei Deev, Robert Olson, Fausto Mosca, Shuichang Zhang, Yunyan Ni, Qi Qu, Randy LaFollette, Guanyi Chen, and Yongchun Tang
AAPG Bulletin
... the least-squares regression method. From the field production rate data, the cumulative production for any time interval could be calculated. For example...
2017
Origin and Environmental Application of Depth-Related Strontium-Isotope Ratios in Brines from the Wilcox Group (Middle Wilcox Aquifer) of East Central Louisiana.
Glenn F. Huff , Jeffrey S. Hanor
GCAGS Transactions
...-fit lines through dissolved bromide and dissolved chloride data for contaminated MRAA wells were calculated using the parametric least-squares method...
1997
Thermochronologic Evidence for Footwall Deformation During Extensional Core Complex Development, Mineral Mountains, Utah
Drew S. Coleman, J. Douglas Walker, John M. Bartley, K. V. Hodges
Pacific Section of AAPG
... Bulletin, v. 105, p. 935-952. York, D., 1969, Least-squares fitting of a straight line with correlated errors: Earth and Planetary Science Letters, v. 5, p...
2001
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
Hybrid Physics and Data-Driven Modeling for Unconventional Field Development Onshore US Basin Case Study
Jaeyoung Park, Akhil Datta-Gupta, Ajay Singh, Sathish Sankaran
Unconventional Resources Technology Conference (URTEC)
... algorithm setting for preliminary algorithm training and validation. For polynomial regression, ordinary least squares linear regression with 2nd degree...
2020
Graphical Techniques for the Analysis and Display of Logging Information: Chapter 2
John H. Doveton
AAPG Special Volumes
... interpretation in hard rock formations: Geobyte, v. 2, no. 3, p. 44-47. Etnyre, L. M., 1984a, Practical application of weighted least squares method...
1994
A Rapid Substitute for Textural Analysis
Irving Sherman
Journal of Sedimentary Research (SEPM)
... include the computation of (1) a least-squares trend line, ordinarily rectilinear, (2) the standard error of estimate a out the trend line, and (3...
1951
Interrelations of Population Growth, Energy Supply, and Environment: DISCUSSION
David L. Mari
AAPG Bulletin
... analysis has been employed by using the criterion of least squares to find the equation of a line which in some sense provides the best possible fit...
1974
Thermal-Analysis Technique for Source-Rock Evaluation: Quantitative Estimate of Organic Richness and Effects of Lithologic Variation: GEOLOGIC NOTES
George E. Claypool , P. Robert Reed
AAPG Bulletin
... regression based on all samples. Dashed line is nonlinear least-squares fit (power curve) computed for shale lithologies only. End_Page 610...
1976