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The AAPG/Datapages Combined Publications Database
Showing 1,463 Results. Searched 196,121 documents.
Potassium-Argon Isotopic Dating Method and Its Application to Physical Time-Scale Studies
Ian McDougall
AAPG Special Volumes
... analysis of argon extracted at temperatures indicated for hornblende 5H plotted on isochron diagram. Slope of line, determined by a least-squares procedure...
1978
Meramec Velocity Systematics
Jing Fu, Carl Sondergeld, Chandra Rai
Unconventional Resources Technology Conference (URTEC)
... content. The following fits to the data are obtained by least-squares regression. For compressional velocity (φ is the volume fraction pores, Clays...
2020
Seismic Velocity Variations in San Joaquin Valley, California
Walter S. Olson
AAPG Bulletin
..., and the linear increase of interval velocity with depth. Both equations may be fitted to data by using least squares. These equations give the simplest...
1941
Structure of Falkland Plateau and Offshore Tierra del Fuego, Argentina: Rifted Margins
W. J. Ludwig , C. C. Windisch , R. E. Houtz , J. I. Ewing
AAPG Special Volumes
... of the Falkland Islands. The velocity regression equation (least-squares fit) of the interval velocities of seismic layers to one-way travel time...
1979
Autoregressive and Machine Learning Driven Production Forecasting - Midland Basin Case Study
I. Gupta, O. Samandarli, A. Burks, V. Jayaram, D. McMaster, D. Niederhut, T. Cross
Unconventional Resources Technology Conference (URTEC)
... equations (e.g., hyperbolic) using a least-squares or some other error-minimizing algorithm. While these approaches are frequently used...
2021
Inference of Induced Fracture Geometries Using Fiber-Optic Distributed Strain Sensing in Hydraulic Fracture Test Site 2
Stephen Bourne, Kees Hindriks, Alexei A. Savitski, Gustavo A. Ugueto, Magdalena Wojtaszek
Unconventional Resources Technology Conference (URTEC)
...). Fracture widths at the fracture-fiber intersection are estimated using a least-squares inversion, where the matrix of influence coefficients between...
2021
Crustal Structure of Queen Elizabeth Islands and Polar Continental Margin, Canada: Evolution of Arctic Ocean Basin
L. W. Sobczak, J. R. Weber
AAPG Special Volumes
... of least squares. By using the greater number of measurements and concentrating on the smaller anomalies, Bhattacharyya was able to provide reater...
1973
An Empirical Correlation to Predict Relative Permeability in Fractured Reservoirs Considering the Stress State and the Capillary Number
Kelly Díez, Alejandro Restrepo, Alirio Ocampo, Jonny Patiño, Juan Rayo, Diego Ayala, Luis Rueda
Unconventional Resources Technology Conference (URTEC)
.... The least improved recovery was obtained under low capillary number and stress state conditions. This is due to the fact that these conditions promote...
2022
Quantifying Proppant in the SRV Along a Fractured Well at the Hydraulic Fracturing Test Site: A Proppant Log Case Study from Permian-Delaware Basin
Debotyam Maity, Jordan Ciezobka
Unconventional Resources Technology Conference (URTEC)
... trained regression trees. The model is generated by fitting an ensemble of learners for regression. It uses a gradient boosting strategy applied for least...
2022
Do Moment Tensors Flip During Hydraulic Completions?
Adam Baig, Sepideh Karimi, Benjamin Witten, Aaron Booterbaugh
Unconventional Resources Technology Conference (URTEC)
... recorded from a mixed array of surface and near-surface, wellbore deployed geophones and the moment tensors we obtain therefrom through least-squares...
2022
Late Oligocene Sequence Stratigraphy (lower Arcadia Formation) of Southwest Florida
Missimer, Thomas M.
GCAGS Transactions
... p. Kirschvink, J. L., 1980, The least-squares line and plane and analysis of paleomagnetic data: Geophysical Journal of the Royal Astronomical Society...
2002
The Influence of Areal Trends on Correlations Between Sedimentary Properties
W. C. Krumbein, Thomas A. Jones
Journal of Sedimentary Research (SEPM)
... illustrative example, we fitted linear least-squares surfaces to the maps of Figure 1, as shown in Figure 2. Table 1 lists the observed data...
1970
Subtidal Holocene Dolomite, Baffin Bay, Texas
E. William Behrens, Lynton S. Land
Journal of Sedimentary Research (SEPM)
...------------------------ least squares fit using all available data and the percent of MgCO3 in the unit cell is reported based on the ao parameter...
1972
A Hybrid Machine Learning Workflow for CO2 Huff-n-Puff
Gurpreet Singh, Anuj Gupta, Uchenna Odi, Davud Davudov, Birol Dindoruk, Ashwin Venkatraman, Rabah Mesdour
Unconventional Resources Technology Conference (URTEC)
... Using Least-Squares Support Vector and Gaussian Process Regression Proxies. SPEJ 26 (04), 2021. • Haiming Gao, Wanfen Pu. Experimental Study...
2024
Characterizing the Tops of Devonian Units in the Challenging Sub-Andean Region of Bolivia
Paola Delgado, Gerardo Villacorta, Andrea Di Daniel, Karim Bondabou
Unconventional Resources Technology Conference (URTEC)
... by a weighted least-squares regression of the unknown measured spectrum against a library of known mineral-standard spectra. Chemostratigraphy, as applied here...
2024
Rb-sr Whole-rock Geochronology and Clay Mineralogy of the Madera Formation Near Albuquerque, New Mexico
B. Mukhopadhyay , D. G. Brookins
Journal of Sedimentary Research (SEPM)
.... EUGSTER, 1955, Synthetic and natural muscovite: Geochim. Cosmochim. Acta, v. 8, p. 225-280. YORK, D., 1966, Least squares fitting of a straight line: Can...
1976
Landward Migration of Barrier Island Sands Under Stable Sea Level Conditions: Plum Island, Massachusetts
J. Richard Jones, Barry Cameron
Journal of Sedimentary Research (SEPM)
... points as the independent variables with the observations as the dependent variables. Trend analysis uses the method of least squares regression...
1977
Occurrence of Strained Quartz in the Siliceous Frustules of Cultured Freshwater Diatoms
Jay M. Gregg , Susan T. Goldstein , Lester J. Walters, Jr.
Journal of Sedimentary Research (SEPM)
.... Jour. Sci., v. 267-A, p. 114-133. EVANS, W. A., JR., D. E. APPLEMAN, AND D. S. HANWERKER, 1963, The least-squares refinement of crystal unit cells...
1977
Production of Carbonate Sediments by Selected Large Benthic Foraminifera on Two Pacific Coral Reefs
Pamela Hallock
Journal of Sedimentary Research (SEPM)
... for each species were fitted to power function curves of diameter to mass by least squares fit. The resulting equations are presented in Table 1...
1981
Albite of Secondary Origin in Charny Sandstones, QueBec: A Re-evaluation
O. Ogunyomi, R. F. Martin, R. Hesse
Journal of Sedimentary Research (SEPM)
..., indexing and least-squares refinement of powder data: National Tech. Info. Serv., U.S. Dept. Commerce, Document PB 216 188. BOLES, J. R., AND FRANKS...
1981
A Philosophy of Contour Mapping with the Computer: Chapter 1
Thomas A. Jones, David E. Hamilton
AAPG Special Volumes
... processing. However, this decision should be the geologist's, Fig. 4. Diagrammatic cross section showing least-squares grid (dotted line) and weighted-average...
1992
Three-Dimensional Modeling Techniques in the Analysis of a Mature Steam Drive: Chapter 18
Ramsay A. Barrett, Jeffery Bailey
AAPG Special Volumes
...-top grid was built using the minimum-tension algorithm in ISM. This algorithm is similar to least squares and results in a surface with a smooth...
1992
Variations in Density of V-Shaped Impact Pits on Quartz Grains, with Size of Grains, Intertidal Sands, Bay of Fundy
G. V. Middleton, C. A. Kassera
Journal of Sedimentary Research (SEPM)
... density of Vs on those parts of the surface that do show Vs. Figure 1 shows a linear (least-squares) regression of V density on grain size (phi). Closer...
1987
Downstream Changes in Sand Composition, Roundness, and Gravel Size in a Short-headed, High-Gradient Stream, Northwestern Italy
Earle F. McBride, M. Dane Picard
Journal of Sedimentary Research (SEPM)
...) follow a linear exponential trend whose least-squares regression formula is size () = 0.1167 distance (km) - 10.29. The formula has...
1987
Geology and Uranium Geochemistry of the Chinati Mountains Caldera, Trans-Pecos Texas
Joseph C. Cepeda, Christopher D. Henry, Timothy W. Duex
AAPG Special Volumes
... Field Eng. Corp. Final rept. for National Uranium Resource Evaluation, 49 p. Wright, T. L., and P. C. Doherty, 1970, A linear programming and least...
1981