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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,685 documents.
The Influence of Transport Fluctuations on Spatially Averaged Topography on a Sandy, Braided Fluvial Fan
Chris Paola, Gary Parker, David C. Mohrig, Kelin X. Whipple
Special Publications of SEPM
... of the form O F t and to may be E where F is a least squares fitted function and E is a normally distributed random variable with zero mean This allows...
1999
Using NMR-Based Indices for determining Accessible Mineral Surfaces in Unconventional Sedimentary and Igneous Rocks
Shaina Kelly, Olivia Terry, Zuhao Kou, Ron Bonnie, James Howard, Dragan Veselinovic, Michael Dick
Unconventional Resources Technology Conference (URTEC)
... an NWI value via a least-squares fit between a predicted T2 distribution (black trace) and URTeC 4265889 7 a measured T2 distribution (brown trace...
2025
Sampling Surficial Fluvial Gravels: The Precision of Size Distribution Percentile Estimates
Stephen Rice , Michael Church
Journal of Sedimentary Research (SEPM)
... upon n, and the 1/n dependency is modified such that sp' = ap'·s·nb' (7) where ap' and b' can be determined by least-squares regression. Figure 1 shows...
1996
Quantitative Mineralogy of Sandstones by X-Ray Diffractometry and Normative Analysis
Colin R. Ward , John C. Taylor , David R. Cohen
Journal of Sedimentary Research (SEPM)
... crystal structure and instrumental parameters by least-squares analysis of the profile. Some 14 instrumental parameters were identified, including...
1999
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
Geothermal Characteristics of North Jiangsu Basin and its Tectonic Implications
Wang Yi-hua
Circum Pacific Council Publications
... solved using the least squares criterion presented by Tarantola and Valette (1982), to calculate the heat flow values. Thirty individual heat flow values...
1990
North Gabon: Lightning Strikes Connect the Gulf of Mexico Subsalt Trend to North Gabon
Karyna Rodriguez, Neil Hodgson, Howard Nicholls, Paolo Esestime, TGS
GEO ExPro Magazine
... as salt flank amplitude anomalies in postsalt thick sections. Very early results obtained for recent least squares Reverse Time Migration (RTM) tests...
2019
Acoustic waveform inversion with the Lippmann-Schwinger equation constraint
Rahul Sarkar, Biondo Biondi
International Meeting for Applied Geoscience and Energy (IMAGE)
..., and a two-step alternating minimization strategy to solve it is presented, where each step involves solving a linear least squares problem. We point out...
2022
Replacing Decline Curve Analysis
Randy Hazlett, Umer Farooq, D. Krishna Babu
Unconventional Resources Technology Conference (URTEC)
... and reduce it to inverse problem-solving mode using the IMSL nonlinear least squares regression routine, RNLIN, to solve for the basic parameter set: g, b, L...
2020
Quantitative Mineralogical Analysis of Carbonate Sediments: Comparison of X-ray Diffraction and Electron Probe Microanalyzer Methods: NOTES
Jon N. Weber
Journal of Sedimentary Research (SEPM)
... the appropriate measurements into the equation for the corresponding "working curve" (determined by a least squares fit to a large number of area measurements...
1968
Precise Sediment Density Determination by Gamma-ray Attenuation Alone: NOTES
Robert B. Whitmarsh
Journal of Sedimentary Research (SEPM)
... volume of core and plastic liner. The least squares line fitted to 208 such comparisons never deviates by more than 0.03 gm/cc from the expected line...
1971
Comparison of the Descriptors of Sediment Grain-Size Distributions: REPLY
Thomas A. Jones
Journal of Sedimentary Research (SEPM)
...-linear regression models in geology: Unpublished Doctoral Thesis, Northwestern University, 123 p. JAMES, W. R., 1968b, Least-squares surface fitting...
1971
Field Method for Determining Rapidly the Dry Weight of Wet Sand Samples: RESEARCH METHOD PAPER
Nicholas C. Kraus, Lindsay Nakashima
Journal of Sedimentary Research (SEPM)
... weights (g) and results of linear least squares fit End_Page 550------------------------ the 1.2-mm sand were available. The samples were wetted...
1986
Abstract: Are Double-Couples Over-Represented in Microseismic Focal Mechanism Studies?; #90172 (2014)
Farshid Forouhideh, David W. Eaton
Search and Discovery.com
... problem is ill-posed (Eaton 2009); consequently the least-squares inverted solutions differ from the input mechanism. The results of this synthetic study...
2014
Abstract: Harmonic Decomposition of a Vibroseis Sweep Using Gabor Analysis; #90174 (2014)
Christopher B. Harrison, Gary Margrave, Michael Lamoureux, Art Siewert, and Andrew Barrett
Search and Discovery.com
... design. The decomposition is accomplished through the use of the Gabor transform and least squares to produce broad band estimates of the fundamental...
2014
Abstracts: Blind L1-norm Multichannel Deconvolution for Seismic Source Function Estimation; #90173 (2015)
Jaime Meléndez Martínez
Search and Discovery.com
... the reflectivity is known reduces to a multi-channel damped least-squares solution with quadratic regularization. The cost function from equation (1) is given...
2015
A deep learning-based inverse Hessian for full-waveform inversion
Mustafa Alfarhan, Matteo Ravasi, Tariq Alkhalifah
International Meeting for Applied Geoscience and Energy (IMAGE)
..., we propose the use of an approximate Gauss-Newton Hessian computed from a linearization of the wave-equation as commonly done in Least-Squares...
2023
Abstract: Improving Reservoir Imaging with Time-Lag Fwi in the Partitioned Zone Between Kuwait and Saudi Arabia; #91204 (2023)
Art Petrenko, Trevor Coulman, Guangfu Shao, Ibrahim Hakam, Mohammed Almutairi, Sujoy Ghose, Kai Zhang
Search and Discovery.com
... in the current study is the choice of cost-function. A conventional FWI cost-function is based on the least-squares difference between observed...
2023
Stepwise Regression in the Earth Sciences: A Coastal Processes Example
James H. Balsillie, William F. Tanner
Environmental Geosciences (DEG)
..., Tessier, 1948; Ricker, 1973), the result is a cubic least squares regression (also termed functional regression) outcome given by: (6) d b = 1.277...
1999
A Valuable Approach in a Quantitative Seawater Intrusion Interpretation from the Geoelectrical Resistivity Data for Groundwater Investigation in Dumai Area, Indonesia
Nur Islami, Mitri Irianti, Azhar Azhar, Muhammad Nasir, Muhammad Nor, Fakhruddin Fakhruddin, Dedi Irawan
Geological Society of Malaysia (GSM)
... and 3-D electrical imaging surveys. Geotomo Softw. Malaysia. 232 p. Loke, M.H. & Barker, R.D., 1996. Rapid least-squares inversion of apparent...
2023
Basin Analysis by Model Simulation: Effects of Geologic Parameters on 1-D and 2-D Fluid Flow Systems with Application to an Oil Field
K. Nakayama , I. Lerche
GCAGS Transactions
... the model's behavior, characteristics, and general level of prediction are most easily portrayed within such a framework. The reader interested...
1987
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
Can Transfer Learning Be Used to Forecast Production in Frontier Basins? A Case Study from the Powder River Basin
Dillon Niederhut, Gabriel A. Quintero
Unconventional Resources Technology Conference (URTEC)
... between parent-child relationships and co-developed well patterns. Parent wells were defined as those with at least 90 days of production history prior...
2025
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
Hybrid Physics and Data-Driven Modeling for Unconventional Field Development Onshore US Basin Case Study
Jaeyoung Park, Akhil Datta-Gupta, Ajay Singh, Sathish Sankaran
Unconventional Resources Technology Conference (URTEC)
... algorithm setting for preliminary algorithm training and validation. For polynomial regression, ordinary least squares linear regression with 2nd degree...
2020