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The AAPG/Datapages Combined Publications Database
Showing 2,749 Results. Searched 195,364 documents.
Using and Improving Surface Models Built by Computer: Part 8. Integrated Computer Methods
David E. Hamilton
AAPG Special Volumes
... is appropriate for. A general rule of thumb is that least squares or weighted average algorithms work best when modeling gently undulating horizontal...
1992
Sediment Composition and Hydrography in Six High-Gradient Estuaries of the Northwestern United States
Curt Peterson, Kenneth Scheidegger, Paul Komar, Wendy Niem
Journal of Sedimentary Research (SEPM)
... range widely in mean fluvial-discharge rates and mean tidal-prism volumes (Table 1). A least-squares linear regression performed on estuarine drainage...
1984
Contouring by Machine: A User's Guide
Richard F. Walters
AAPG Bulletin
... is derived as a least squares function of these values, weighted according FOOTNOTE 3. ACI Contouring Package available through E. J. Assiter, President...
1969
Machine Learning Based Decline Curve - Spatial Method to Estimate Production Potential of Proposed Wells in Unconventional Shale Gas Reservoirs
Y. Kocoglu, M. E. Wigwe, G. Sheldon, M. C. Watson
Unconventional Resources Technology Conference (URTEC)
.../10.2118/179958-ms Cressie, N. (1985). Fitting variogram models by weighted least squares. Mathematical Geology, (17), 563–586. Cressie, N., & Wikle, C. K. (2011...
2020
Imaging the Colorado Plateau - Basin and Range Transition Zone Using Basalt Geochemistry, Geochronology and Geographic Information Systems
Reina F. Downing, Eugene I. Smith, Richard L. Orndorff, Terry L. Spell, Kathleen A. Zanetti
Pacific Section of AAPG
... of Geophysical Research, v. 101, p. 17,425-17,445. York, D., 1969, Least squares fitting of a straight line with correlated errors: Earth and Planetary...
2001
EUR Assessment of Unconventional Assets Using Machine Learning and Distributed Computing Techniques
Zhenyu Guo, Chaohui Chen, Guohua Gao, Richard Cao, Ruijian Li, Chunlei Liu
Unconventional Resources Technology Conference (URTEC)
...., Lukas, L., and Vandewalle, J. 2002. Weighted least squares support vector machines: robustness and sparse approximation. Neurocomputing, 48(1), 85-105...
2017
Oblique Convergence During Northeast-Southwest Laramide Compression Along the East-West Owl Creek and Casper Mountain Arches, Central Wyoming
Philipp C. Molzer, Eric A. Erslev
AAPG Bulletin
... determines the directions and relative magnitudes of the principal stress axes. The least-squares algorithm of Angelier (1990), as implemented...
1995
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
Improved Petrological Modal Analyses from X-Ray Powder Diffraction Data by Use of the Rietveld Method. Part II. Selected Sedimentary Rocks
W. G. Mumme, G. Tsambourakis, I. C. Madsen, R. J. Hill
Journal of Sedimentary Research (SEPM)
... of the diffraction peaks are not directly used, but rather a least-squares fit is obtained between the step-scanned points in the observed X-ray diffraction profile...
1996
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
Depositional Environments and Reservoir Properties of Sandstones of Lower Cretaceous Nanushuk and Upper Cretaceous Colville Groups, Umiat Test Well 11, National Petroleum Reserve, Alaska: ABSTRACT
James E. Fox, P. W. Lambert, J. K. Pitman
AAPG Bulletin
... was southwest of Umiat and the delta prograded northeasterly. Weighted average porosity and permeability of cored sandstones are 15.6% and 167 md...
1981
Abstract: Weighted Stacking of Seismic AVO Data using Hybrid AB Semblance and Local Similarity; #90255 (2017)
Pan Deng, Hua-Wei Zhou, Yu Zhang, Yuyang Tan, Yangkang Chen
Search and Discovery.com
...Abstract: Weighted Stacking of Seismic AVO Data using Hybrid AB Semblance and Local Similarity; #90255 (2017) Pan Deng, Hua-Wei Zhou, Yu Zhang...
2017
Comparison of Magnetic Vector Inversion With Sparse Norm Susceptibility Inversion Accounting for Demagnetization
John M. Weis, Lindsey J. Heagy, Douglas W. Oldenburg
International Meeting for Applied Geoscience and Energy (IMAGE)
... and smoothness terms in equation 4. To apply these norms we use the iteratively re-weighted least squares approach of Fournier and Oldenburg (2019...
2023
Amplitude Recovery of Digitally Recorded Data
Roy O. Lindseth
Pacific Section of AAPG
.... The simplest approach to the compensation operation is merely to calculate by least squares an exponential decay curve to fit the entire seismic trace...
1972
The Tsunami Survey Offshore Sumatra, a Cooperative Geo-Technical Project for Deep Crustal Study WesternGeco/Schlumberger/CNRS-IPG Paris/BPPT
Soelistijani M, Martin Bayly, Tim Bunting, Satish C. Singh
Indonesian Petroleum Association
... least squares radon demultiple filter once a velocity field was developed. Before final stacking, time and space variant inside muting and spectral...
2008
Thin Bed Resolution and the Determination of Flushed Zone Resistivity in Oil Based Mud
Joseph F. goetz, Roland Chemali, Douglas J. Seifert
Geological Society of Malaysia (GSM)
.... SmvA, a global mapping dip computation program, makes optimum use of the available redundancy through a weighted least squares optimization approach...
1990
Two Rb-Sr Whole Rock Isochrons from Plutons in the Cobequid Highlands, Nova Scotia, Canada
H. V. Donohoe, A. N. Halliday, J. Duncan Keppie
Atlantic Geology
... (SUMS - sum of the squares of the residuals) MSWD - 81.6 (MSWD - mean squared weighted deviates) magma had a crustal component. The mafic mineralogy...
1986
Global Sea-Level Changes During the Past Century
Vivien Gornitz, Sergej Lebedeff
Special Publications of SEPM
... a composite, coastal area-weighted average sealevel curve before obtaining a least-squares fit slope for the region. Finally, the global sea-level change...
1987
Two Inversion Case Studies from the SCOOP and STACK Area of Oklahoma
Satinder Chopra, Ritesh Kumar Sharma, James Keay
Unconventional Resources Technology Conference (URTEC)
... at these angles are then generated, compared with the real data and the error between them is then minimized in a least squares sense. The output from...
2019
Variation of organic matter density with thermal maturity
Mark D. Rudnicki
AAPG Bulletin
... be fitted using a least-squares approach to measured data (e.g., the “solver” function of Microsoft Excel can be applied to find the best fit value...
2016
Abstract: Elastic Full Waveform Inversion For Land Walkaway VSP Data; #90224 (2015)
Olga Podgornova, Scott Leaney, Marwan Charara, and Eric von Lunen
Search and Discovery.com
... geological basis requires further investigation. Full waveform inversion algorithm We apply a conventional least-squares formulation of FWI...
2015
Seismic Refraction Studies in Gulf of California
Richard P. Phillips
AAPG Special Volumes
... the input data; these "water delay corrected" data were then used to calculate slopes and intercepts of lines using the method of least squares...
1964
Data Analytics for Production Optimization in Unconventional Reservoirs
Srikanta Mishra, Jared Schuetter, Ming Zhong, Randy Lafollette
Unconventional Resources Technology Conference (URTEC)
... in Table 3. Table 2. Several Regression Modeling Options Model Ordinary Least Squares (OLS) Regression Random Forest (RF) Gradient Boosting Machine (GBM...
2015
Continental Extension in Southern Britain and Surrounding Areas and Its Relationship to the Opening of the North Atlantic Ocean: Chapter 26: European-African Margins
R. Andrew Chadwick, Roy A. Livermore, Ian E. Penn
AAPG Special Volumes
... (1987) used a weighted-least squares procedure to derive a Euler pole directly from the 290-240 Ma segments of the APW paths. The best-fitting rotation...
1989
Rb-Sr Isotopic Data from Three Suites of Igneous Rocks, Cape Breton Island, Nova Scotia
J. Duncan Keppie, A. N. Halliday
Atlantic Geology
... of the squares of the residuals (York, 1969) XMSWD - me an squared weighted deviates (York, 1969) 1 .2 0 0.59 0 0 167 K E P P IE AND HALL I DAY...
1986