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The AAPG/Datapages Combined Publications Database
Showing 1,680 Results. Searched 200,357 documents.
Settling Velocity and Grain Shape of Maërl Biogenic Gravel
Siddhi Joshi, Garret P. Duffy, Colin Brown
Journal of Sedimentary Research (SEPM)
... diameter. The reciprocal of convexity increases linearly with diameter. The solid line represents the least-squares fit between the reciprocal convexity...
2014
Recognition Of Deltas by Fitting Trend Surfaces to Upper Pennsylvanian Sandstones in North-Central Texas
E. G. Wermund, W. A. Jenkins Jr.
Special Publications of SEPM
... and negative residuals. The line (plane) provided by the computer program is the best possible fit in the least squares sense. This means that the sum...
1970
Clay Minerals in the Sediments of Lake Baikal: A Useful Climate Proxy
Richard Yuretich , Martin Melles , Brenn Sarata , Hannes Grobe
Journal of Sedimentary Research (SEPM)
... are not amenable to a direct statistical analysis. However, when the data are smoothed (locally weighted least-squares regression, coefficient = 0.3...
1999
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
Quartz Fabric in Shales: Quantification and Assessing its Influence on Geomechanical Properties
M. Rebecca Stokes, Andrew P. Rathbun, Paul C. Montgomery, Michael C. Cheshire, E. Russ Peacher
Unconventional Resources Technology Conference (URTEC)
... Method of least squares for multiple regression Multiple regression analysis using a least squares approach was performed with the Microsoft Excel...
2021
Venture Gas Field, Offshore Nova Scotia: Case Study of Overpressuring in Region of Low Sedimentation Rate
Brett S. Mudford , Melvyn E. Best
AAPG Bulletin
... of one standard deviation of the least-squares value of the gradient. Overpressuring occurs in strata with present temperatures greater than 120°C...
1989
A Comparison of Air Photograph and Computer Simulated Wave Refraction Patterns in the Nearshore Area, Richibucto, Canada and Jervis Bay, Australia
Edward A. Bryant
Atlantic Geology
... the programs occurs with this interpolation of depth from a regular gridded matrix. The Wilson program uses a least squares fitting based upon the four...
1974
A factorization-based, tile low-rank parametrization for 3D multidimensional deconvolution
Fuqiang Chen, Matteo Ravasi, David Keyes
International Meeting for Applied Geoscience and Energy (IMAGE)
... a nuclear-norm regularized least-squares approach: 84th Annual International Conference and Exhibition, EAGE, Extended Abstracts, 2023, 1–5, doi: https...
2024
Marine Sediments North of Scripps Submarine Canyon, La Jolla, California
C. Stanley Wimberley
Journal of Sedimentary Research (SEPM)
.... The decrease in diameter from the surf zone outward (except for Class C) is correlative with the increase in depth according to the least squares equation...
1955
Quantitative Characterization of Deformation and Damage in Shale Under Compression Utilizing Digital Image Correlation
Fatick Nath, Edgardo Aguirre, Gabriel Aguirre, Jose L. Perez, Cesar Netro, Flavio Borjas, Valeria Limon
Unconventional Resources Technology Conference (URTEC)
...., Asundi, A., Xie, H., Gao, J., 2009. Digital image correlation using iterative least squares and pointwise least squares for displacement field...
2022
A New Perspective to Shallow Water Flow (SWF) and Sinking Well-Head Preventions in Deep Water
Selim Simon Shaker
GCAGS Transactions
... in reference to subsea. The least squares fit for all the sand data measurement are linear with R2 values of 0.99 (Figs. 7 and 8). This is in agreement...
2015
Parameterizing and Block-Averaging Electrical Characteristics of a Reservoir: an Essential part of Electrical/Electromagnetic Evaluation of Production Process: Reservoir Characterization and Modeling
A. J. Mansure
AAPG Special Volumes
..., Washington, pp 23, 1966. 19. Anderson, W.L., Adaptive nonlinear least-squares solution for constrained or unconstrained minimization problems (Subprogram...
1991
X-Ray Mineralogical Discrimination of Depositional Environments of the Krishna Delta, Peninsular India
Ray E. Ferrell , George F. Hart , Seetarama Swamy , Bhanu Murthy
Journal of Sedimentary Research (SEPM)
... the 2-50° 2 interval on XRD patterns of EG-saturated samples. A least-squares minimization technique was used to assess the goodness of fit between...
1998
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
An IR-Based Field Analytical Method for Total Petroleum Hydrocarbon Measurement - Field Deployment and Benefit in Site Remediation
Deyuan Kong, Sara Mcmillen, Yohanes Eka Kurniawan, Timothy Vidra, Dion Kumboro, Sarah Chitra, Arya Angga Respati, Kasman Sutrisno
Indonesian Petroleum Association
...An IR-Based Field Analytical Method for Total Petroleum Hydrocarbon Measurement - Field Deployment and Benefit in Site Remediation Deyuan Kong, Sara...
2018
Data Analysis and Model Development
Alan P. Byrnes
Special Publications of SEPM
... methodology commonly util ized is least squares regression analysis. This analysis is easy to perform, allows easy conceptual examination of the regressions...
1994
Improving subsalt images using FWI and FWI imaging: A streamer case study at Big Foot
Weihong Fei, Jingru Chen, Min Yang, Leah Grassi, Erik Everson, Paul Bovet, Marin Laomana, Sheree Wold, Alex Yanjun Hao, Chi Chen, Shubin Zeng, Zhiyuan Wei
International Meeting for Applied Geoscience and Energy (IMAGE)
... illumination and to improve the subsalt S/N, benefited from the least-squares data fitting Second International Meeting for Applied Geoscience & Energy...
2022
Mapping of Rock Property Changes in Space and Time Using Microseismic Data through Full-Waveform Inversion
Jyoti Behura
Unconventional Resources Technology Conference (URTEC)
... (Figure 2d) from the processed microseismic data in Figure 4. The gradient of the least-squares objective function is efficiently computed using...
2016
Correlation between PMT and SPT results for Kenny Hill Formation
Mohd Faiz Mohammad Zaki, Mohd Ashraf Mohamad Ismail, Darvintharen Govindasamy, Mohd Hazreek Zainalabidin
Geological Society of Malaysia (GSM)
... combination with 95% confidence level produce R2 = 0.642. Regression analysis was carried out the least squares that fit given data and R-square was computed...
2019
A Pressure Transient Technique for Monitoring Waterfloods
Jeff Spath
Indonesian Petroleum Association
...: Since we know M/(M-1) and sa from our previous analysis we can estimate sv (say through the method of least squares) that would give us a straight...
2000
The economic environment and the growth in reserves from known gas fields in the Gulf of Mexico
Kevin F. Forbes, Ernest M. Zampelli
CSPG Bulletin
... OGIFF data. Based on the restricted least squares estimate of a function in which AGFs are assumed to decline monotonically with the age of the field...
2012
Rock Magnetic Determination of Angular Deviation in Grain Alignment Between Channel and Levee Sandstones Within a Submarine Fan Channel-Levee Complex, Brushy Canyon Formation, West Texas
Debnath Basu
GCAGS Transactions
... that the anisotropy is measured with sufficient redundancy and the best fit anisotropy tensor was determined using a least squares method. The tensor...
1995
Abstract: Predicting Free Surface Multiples without the Water: SRME on Land; #90224 (2015)
Keith Wilkinson, Richard Bale, and Ken Gray
Search and Discovery.com
... in this paper 5. Least squares adaptive subtraction of predicted multiple Datapages/Search and Discovery Article #90224 GeoConvention © 2014, FOCUS - Adapt...
2015
Porosity Trends of the Lower Cretaceous J Sandstone, Denver Basin, Colorado
James W. Schmoker, Debra K. Higley
Journal of Sedimentary Research (SEPM)
... sandstone porosity histograms are plotted as a function of vitrinite reflectance in Figures 6-10. Least-squares power-law regression lines with R0...
1991
Synthetic Stratigraphy with a Stochastic Diffusion Model of Fluvial Sedimentation
Jon D. Pelletier, Donald L. Turcotte
Journal of Sedimentary Research (SEPM)
... scales. A least-squares linear fit to the logarithms (base 10) of the data yields a slope of -0.76. This result is consistent with the analysis...
1997