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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,693 documents.
NMR Quantification of Wettability and Water Uptake in Unconventionals
M.J. Dick, D. Veselinovic, R. J. M. Bonnie, S. Kelly
Unconventional Resources Technology Conference (URTEC)
... a predicted T2 spectrum which is compared (via a least-squares fit) to a T2 spectrum recorded from a sample partially saturated with both water...
2021
Dynamic Stress Effects on Production Decline in Haynesville Shale Gas Wells
Ehab Rabah, I. Yucel Akkutlu
Unconventional Resources Technology Conference (URTEC)
..., in graphical form. The decline of the well was analyzed using the least squares regression. This gives the best matched values for qi, Di, b, and c...
2025
AAPG Studies in Geology 47: Geological Perspectives of Global Climate Change, Chapter 11 - The Search for Patterns in Ice-Core Temperature Curves
Davis, John C.; Bohling, Geoffrey C.
AAPG Special Volumes
... by least squares. This transformation does not alter the test results.) Figure 1...
2001
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
Rapid diagenesis and microbial biosignature degradation in spring carbonates from Crystal Geyser, Utah, U.S.A.
Jon Lima-Zaloumis, Jack D. Farmer, Elizabeth Trembath-Reichert
Journal of Sedimentary Research (SEPM)
...). Compositional maps were generated using a classical least-squares (CLS) fitting algorithm in LabSpec6. For this method, two mineralogical endmembers...
2024
Identification and Initial Correlation of Magnetic Reversals in the Lower to Middle Ordovician of Northern Arkansas
M. Randy Farr, Donald R. Sprowl, Jordan Johnson
Special Publications of SEPM
... sections and to the lower to middle St Peter Sandstone in one sec vectors using were cal the least squares I980 RESULTS Demagnetization Behavior...
1993
Magnetostratigraphic, Biostratigraphic, and Lithologic Correlations in Triassic Strata of the Western United States
Maureen B. Steiner, Micheal Morales, Eugene M. Shoemaker
Special Publications of SEPM
... of characteristic tion were determined for each sample by fitting direc magnetiza lines to the demagnetization paths using the least squares...
1993
Influence of Depositional Environment and Diagenesis on Regional Porosity Trends in the Lower Cretaceous "J" Sandstone, Denver Basin, Colorado
Debra K. Higley, James W. Schmoker
Rocky Mountain Association of Geologists
... depth (Fig. 6). The r for the least-squares fit of the log of porosity to depth is -0.79 for the porosity database and -0.69 for the channel-sandstone...
1989
Rhythmic Linear Sand Bodies Caused by Tidal Currents
Theodore Off
AAPG Bulletin
... on the graph was drawn by the "least squares" method. If the points farthest from the line are thrown out (which might be justified on the basis that other...
1963
Pre-Cretaceous Rocks of Northwestern Honduras: Basement Terrane in Sierra de Omoa
Gregory S. Horne , George S. Clark , Paul Pushkar
AAPG Bulletin
... areas (Fig. 5) were calculated using the least-squares method of York (1966). The errors on these ages are given at the 95-percent confidence level...
1976
Anomalous Tectonic Subsidence of the Southern Australian Passive Margin: Response to Cretaceous Dynamic Topography or Differential Lithospheric Stretching?
B. J. Brown, R. D. Müller, H. I. M. Struckmeyer
Petroleum Exploration Society of Australia (PESA)
... (~ factor). The misfit between the model (modelled subsidence and strain rate curve) and backstripped tectonic subsidence is minimised in a least-squares...
2001
Phytostabilization of a landfill containing coal combustion waste
Christopher Barton, Donald Marx, Domy Adriano, Bon Jun Koo, Lee Newman, Stephen Czapka, John Blake, Donald Marx, Domy Adriano, Bon Jun Koo, Lee Newman, Stephen Czapka, John Blake, Domy Adriano, Bon Jun Koo, Lee Newman, Stephen Czapka, John Blake, Bon Jun Koo, Lee Newman, Stephen Czapka, John Blake, Lee Newman, Stephen Czapka, John Blake, Stephen Czapka, John Blake, John Blake
Environmental Geosciences (DEG)
... by backtransformation of the least-squares mean (LSM) from the logistic models (eLSM)/(1 + eLSM). Seedling growth was estimated by subtracting the initial height (April...
2005
Pressure Transient Behaviour of Naturally Fractured Reservoirs
Doddy Abdassah
Indonesian Petroleum Association
... combined with a non-linear, least squares regression technique to analyze the buildup data. Figure 22 shows the Horner plot of test C. Small insert...
1985
An Analysis of Crude-Oil Discovery Rate in Alberta
J. T. Ryan
CSPG Bulletin
... in this equation were determined by fitting it to both the recoverable and the oil-in-place data for the province with a nonlinear least-squares technique...
1973
A Comparative Study of Monotonic and Cyclic Injection Hydraulic Fracturing in Saturated Tight Rocks Under Triaxial Stress
Saurabh Goyal, Mark E. Curtis, Carl H. Sondergeld, Chandra S. Rai
Unconventional Resources Technology Conference (URTEC)
... the arrival times at the sensors (adjusted for the sensor delays) and a weighted least squares inversion method. Only those events which have clear...
2020
Trishear Kinematic Modeling of Structures, with Examples from the Neuqun Basin, Argentina
Richard W. Allmendinger, Toms Zapata, Ren Manceda, Francisco Dzelalija
AAPG Special Volumes
... of fit of each unique combination of parameters is evaluated by simple least squares linear regression, using χ2 as a statistic. The combination...
2004
Micritized Skeletal Grains in Northern Belize Lagoon: A Major Source of Mg-calcite Mud
R. Pamela Reid, Ian G. Macintyre, Jeffrey E. Post
Journal of Sedimentary Research (SEPM)
... composite powder diffraction pattern. This calculated pattern is compared on a point-by-point basis to the observed pattern and then using a least squares...
1992
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
Wireline Geochemical Log Analysis of Thin Bed Reservoirs: Gulf of Mexico
R. V. Everett, J. E. Mc Donald, M. M. Herron
New Orleans Geological Society
... and in the detector. Analysis of the intensity of gamma rays present in such a spectrum by a set of standards, uses a weighted-least-squares (WLS...
1988
Acquisition and Ananlysis of Wide-Angle Reflection and Refraction Seismic Data
Paul L. Stoffa
Circum Pacific Council Publications
.... In this analysis method, we assume traveltime trajectories of the form: 2 T = t 2 o 2 + X /V § 2 VRMS/VRMS) based on least squares T - X fits...
1989
Some Problems in Thermal History Studies
David Deming, Jeffrey A. Nunn, Steven Jones, David S. Chapman
Rocky Mountain Section (SEPM)
..., Aracas field data (Fig. 1b) are uncorrected. Least-squares regressions yield average geothermal gradients of 24 and 20 °C/km; respectively...
1990
The Relationship of Lithology and Tectonics to Fracturing in the Monterey Formation, Point Arguello Field, Offshore California
By R. K. Sadler
Special Publications of SEPM
... a non-negative least squares procedure. Detritus is considered to be the sum of feldspars, clay minerals, kerogen, pyrite, and detrital quartz...
1990
Laramide Paleostress Trajectories From Stylolites In The Big Bend Region
Richard J. Erdlac, Jr.
West Texas Geological Society
.... Groshong, Jr., R.H., 1974, Experimental test of least-squares strain gage calculation using twinned calcite: Geological Society of America Bulletin, v...
1994
Hindcasting Production in Four Shale Gas Basins Using a Physics-based Approach
Frank Male
Unconventional Resources Technology Conference (URTEC)
...ry over time is fit to this curve to determine the proper scaling to explain its production history. A least squares minimization algorithm is used ...
2018
Advanced Joint Interpretation of Image Logs and Conventional Well Logs in Organic-Rich Mudrock Formations for Improved Formation Evaluation: Application to the Permian Basin
Andres Gonzalez, Sabyasachi Dash, Zoya Heidari
Unconventional Resources Technology Conference (URTEC)
... Using Texture Features. Computers and Geosciences 37 (4): 541-553. https://doi.org/10.1016/j.cageo.2010.08.008. Lloyd, S. 1982. Least Squares...
2020