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The AAPG/Datapages Combined Publications Database
Showing 1,462 Results. Searched 196,209 documents.
Seismic Refraction Data from Sunda Shelf
Robert E. Houtz , Dennis E. Hayes
AAPG Bulletin
... is determined from a five-point least-squares parabola. The "window" is advanced sequentially, one digitized point at a time, to the next set of five...
1984
Hydrothermics in the Wyoming Overthrust Belt
Gary W. Zielinski , , James A. Drahovzal , , Gail Moritz Decoursey , , Joseph M. Ruperto
AAPG Bulletin
...). Fig. 14. Mean annual surface temperature (Ts) vs. thermal gradient (g). Solid line is least-squares fit to data. Open symbols are measurement from...
1985
Interpreting Rock-Eval Pyrolysis Data Using Graphs of Pyrolizable Hydrocarbons vs. Total Organic Carbon (1)
F. F. LANGFORD and M. -M. BLANC-VALLERON
AAPG Bulletin
..., the least squares regression line is a statistical averaging process, and there should be a geological or other basis to ensure that each line is calculated...
1990
A Simpler Kinetic Model of Vitrinite Reflectance
Noriyuki Suzuki , Hideki Matsubayashi , Douglas W. Waples
AAPG Bulletin
... defined, SIMPLE-Ro has only two free parameters: ^agr and ß in equation 1. The values of ^agr and ß can be determined by least-squares analysis...
1993
Abstract: AVAZ Inversion for Fracture Orientation and Intensity: a Physical Modeling Study; #90187 (2014)
Faranak Mahmoudian and Gary F. Margrave
Search and Discovery.com
... in matrix form can be written as, Gnm×3 X3×1 = Rnm×1 . (24) The unknown vector X = (W11 , W12 , W22 ) can be obtained from a damped least-squares inversion...
2014
Deconvoluting Mixed Petroleum and the Effect of Oil and Gas-Condensate Mixtures on Identifying Petroleum Systems; #42564 (2020)
Kenneth Peters, Andrew Murray
Search and Discovery.com
... of endmembers, including oil and gas condensate (<3,000 and >3,000 scf/bbl, respectively), which we deconvoluted by alternating least squares regression...
2020
Statistical Methods For Log Analysis of Reservoir Properties: Chapter 1
John H. Doveton
AAPG Special Volumes
...: The Technical Review, v. 36, no. 4, p. 12-21. Etnyre, L. M., 1984a, Practical application of weighted least squares method to formation evaluation, Part I...
1994
Geology, Petrology and Geochemistry of Submarine Volcanoes Around Epi Island, New Hebrides Island Arc
Anthony J. Crawford, H. Gary Greene, Neville F. Exon
Circum Pacific Council Publications
... then be tested using the Raleigh fractionation equation for trace elements. For all least-squares mixing tests, the GENMIX petrological mixing program (LeMaitre...
1988
Bed Configurations
Gerard Middleton, John B. Southard
Special Publications of SEPM
..., then if we take profiles of the bed surface and the water surface and fit the "best" straight line to them, by some method like least squares...
1984
Two Contrasting Kinematic Styles of Active Folding Above Thrust Ramps, Western Taiwan
Li-Fan Yue, John Suppe, Jih-Hao Hung
AAPG Special Volumes
... 16B) show a linear relationship indicating an excellent least-squares shortening of = 1686 113 m (5531 371 ft) (Figure 16B2), which agrees...
2011
Mantle Creep: Elasticoviscous Versus Modified Lomnitz Law, and Problems of "The New Global Tectonics"
Paul S. Wesson
AAPG Bulletin
... in the moon. A least-squares fit of crater data in the manner of Baldwin (1949) does show some indication of a 1-2-km bulge, but the isostatic compensation...
1972
Integrated Characterization of Carbonate Ramp Reservoirs Using Permian San Andres Formation Outcrop Analogs
C. Kerans , F. Jerry Lucia , R. K. Senger
AAPG Bulletin
... in the grainstone transform. The transforms illustrated in Figure 25 are least-squares fits to the data and have the following equations: Grainstone: k = 5.390...
1994
Retention of High Permeability During Shallow Burial (300 to 500 M) of Carbonate Grainstones
Susan E. Melzer, David A. Budd
Journal of Sedimentary Research (SEPM)
...” permeability) generate a least-squares exponential regression with depth that predicts an average permeability of 50 md at 3270 m (Budd 2001...
2008
The Geometry and Internal Architecture of Stream Mouth Bars in the Panther Tongue and the Ferron Sandstone Members, Utah, U.S.A.
Havard D. Enge, John A. Howell, Simon J. Buckley
Journal of Sedimentary Research (SEPM)
.... The parameter describing the thinning (taper) of each individual clinothem is derived from the least-squares regression line through a cross plot...
2010
Pluto 4D Monitor Two - A Second Outstanding Success
Sandra Mann, Scott Gagen
Australian Petroleum Production & Exploration Association (APPEA) Journal
... collaboration with Woodside geoscientists. Use of modern processing technologies, including least squares migration, full waveform inversion and wave...
2022
Analysis of Fremont River Strath Terraces in the Area of Capitol Reef National Park, Utah – Implications for Fluvial Landscape Evolution and the Role of Climate Forcing
James L. Eddleman, Samual C. Sorber, Thomas H. Morris, Scott D. Grimshaw, Emily Dastrup, William F. Christensen, Scott L. Morris
Utah Geological Association
..., 1994) is thought to be more than adequate for obtaining parameter estimates and was used as the default in the nonlinear least squares statistical...
2007
A Statistical Approach to Understanding Fluid Geochemistry Changes in Unconventional Plays
Craig D. Barrie, Catherine M. Donohue, J. Alex Zumberge
Unconventional Resources Technology Conference (URTEC)
...-linear relationships and variable curvatures (e.g. Peters et al., 2008). However, the alternating least squares (ALS) algorithm in Pirouette® allows...
2020
The Geometry and Dynamics of Low-Relief Bed Forms in Heterogeneous Sediment in a Laboratory Channel, and their Relationship to Water Flow and Sediment Transport
Sean J. Bennett , John S. Bridge
Journal of Sedimentary Research (SEPM)
... with an accuracy of ± 1 mm. The mean water-surface slope S was obtained from a least-squares linear regression of the water-surface elevations...
1995
Aragonitic Algae in Calcite Seas: Effect of Seawater Mg/Ca Ratio on Algal Sediment Production
Justin B. Ries
Journal of Sedimentary Research (SEPM)
...) of the algae (Table 1) were calculated as the slopes of the least-squares linear regressions through the respective data. Figure 6. Calcification by U...
2006
Organic Geochemistry in Relation to the Depositional Environments of Middle Jurassic Coal Seams, Danish Central Graben, and Implications for Hydrocarbon Generative Potential
Henrik Ingermann Petersen, Per Rosenberg, Jan Andsbjerg
AAPG Bulletin
... was done using the computer program sirius (Kvalheim and Karstang, 1987). The partial least squares regression (PLSR) method was used. In PLSR, one...
1996
An Economic Analysis of the Oil and Gas Resources in the Clinton Formation of Ohio
J. T. CumberlidgeW. D. McCullough
Ohio Geological Society
... curve using least squares regression. In those areas where less than ten years of production data were available...
1985
CORROSION CONTROL IN THE USE OF LAKE MARACAIBO WATER FOR WATER - FLOOD PROJECTS
H. F. Finley
Asociación Venezolana de Geología, Minería y Petróleo (AVGMP)
... on the outlet side of the tower. The data are shown plotted in Figure 4. A least squares calculation gave the equation (1) (2) where O2 ml/1...
1960
Spatially varying Chi volumes: A study in offshore Australia on background trend calculation from the Shuey two-term approximation
Hayden Powers, Noah R. Vento
International Meeting for Applied Geoscience and Energy (IMAGE)
... for the FPC algorithm. Other regression methods—least-squares, Random Sample Consensus (RANSAC), and variations of root mean square (RMS)— were tested...
2023
Modelos de Velocidades (Optimizados) en el Caribe Colombiano [PAPER IN SPANISH] VelocityModels (Optimized) in the Colombian Caribbean
Oscar Moreno, Carlos Guerrero, Sid Tschirhart, Giuseppe Fiume, Pedro Gómez
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... Lithologic Variation”. Geophysics, Vol. XVIII, No. 2 April. Legge, J. A., Jr. and Rupnik, J. J. (1939). “Least Squares Determination of the Velocity...
2009
Joint 4D full-waveform inversion using enhanced template-matching objective function
Gaurav Dutta, Emmanuel Saragoussi, Xin Cheng, Markos Sourial, Yongbo Zhai, Chirag Parekh, Denes Vigh
International Meeting for Applied Geoscience and Energy (IMAGE)
... and has better resolution than the 4D RTM difference due to the enhancement in bandwidth obtained due to the non-linear least-squares approach...
2023