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The AAPG/Datapages Combined Publications Database
Showing 1,680 Results. Searched 200,293 documents.
Determination of Well Productivity Using Pump Downtime Data
Jeff Spath
Indonesian Petroleum Association
... unknowns (PI and skin). The model is then compared, in a least squares sense, with the actual runtime data. The unknowns are updated and the process...
2000
Kinematic, Chemical, and Petrological Development of Protomylonite Within the Scove Canyon Segment of the Cuyamaca-Laguna Mountains Shear Zone, Peninsular Ranges, Southern California
Shane M. Howell, Corrin S. Gallarano, Gary H. Girty
Pacific Section SEPM
... in the elemental masses of Ba, Sr, Eu, Cu, and Ni were indicated by least squares analysis, and, though not well understood, may be the result...
1997
Multivariate Based Analysis of Methane Adsorption Correlated to TOC and Mineralogy Impact from Different Shale Fabrics
Sayed Ameenuddin Irfan, Nadiah Mohd Azli, Firas A. Abdulkareem, Eswaran Padmanabhan
Unconventional Resources Technology Conference (URTEC)
.... The multivariate analysis is carried out using the partial least square (PLS) method and support vector regression (SVR), along with random forest regression...
2021
Three-dimensional joint inversion of seismic and gravity data using Gramian constraints and Gauss-Newton approach
Hao Zhu, Hongzhu Cai, Xinyu Wang, Ziang He, Lichao Liu, Xiong Xiong, Xiangyun Hu
International Meeting for Applied Geoscience and Energy (IMAGE)
... physical parameters or their spatial gradients. The optimization problem is addressed using the Gauss-Newton method, and a least-squares approach...
2024
Grain Size Measurement in Thin Section and in Grain Mount: NOTES
Richard E. Smith
Journal of Sedimentary Research (SEPM)
... of the slope, for the length of the "a" axis measured in thin section and grain mount obtained by the method of least squares is: Y = .719 + .791 X (9) where Y...
1966
Abstracts: A New f-p Domain Weighting Function in Minimum Weighted Norm Interpolation of Seismic Data; #90173 (2015)
Zhengsheng Yao, Mike Galbraith, and Randy Kolesar
Search and Discovery.com
... be formulated as an underdetermined least squares inverse problem. In order to force interpolation to follow the directions of seismic events, the weighting...
2015
Abstracts: Evaluation of a New 5D Seismic Volume Reconstruction Method: Tensor Completion versus Fourier Reconstruction; #90173 (2015)
Nadia Kreimer and Mauricio D. Sacchi
Search and Discovery.com
.... The operator indicates the 4D inverse Fourier transform. The cost function (3) is minimized using Iterative Reweighted Least-squares (IRLS) following...
2015
Abstract: A Stable Criterion for Shear-Wave-Splitting Analysis; #90174 (2014)
Xinxiang Li and Jeff P. Grossman
Search and Discovery.com
.... LAS panel (e) is from Bale et al.’s least-squares method. Panel (f) is from a full-scan method with objective function of radial stack power...
2014
Testing Periodicity of Depositional Cyclicity, Cisco Group (Virgilian and Wolfcampian), Texas
Wan Yang , Michelle A. Kominz
Journal of Sedimentary Research (SEPM)
... thickness, and in reality, m is usually larger than n. Unconstrained least-squares regression is used to solve the overconstrained linear problem in Eq 1...
1999
Seamount Age Estimates from Paleomagnetism and Their Implications for the History of Volcanism on the Pacific Plate
William W. Sager
Circum Pacific Council Publications
... new poles are in cluded. Ten are seminorm method results from seamounts with previously published least-squares models (seamounts...
1992
Seismic resolution enhancement with self-supervised learning
Shijun Cheng, Tariq Alkhalifah, Haoran Zhang
International Meeting for Applied Geoscience and Energy (IMAGE)
... methods, numerous techniques have been developed to enhance seismic resolution. The least squares deconvolution (LSD) stands out as one of the most...
2024
Detecting igneous rocks in the presalt with elastic FWI
Gabriel Pacheco, Ana Araújo, Diego Costa, Karine Pereira, Luis Cypriano
International Meeting for Applied Geoscience and Energy (IMAGE)
... algorithms, such as Time-Lag FWI (TLFWI, Zhang et al., 2018) and Least-Squares RTM (LSRTM, Wang et al., 2016), have helped overcome many imaging challenges...
2024
Relation of Carbon Dioxide Content of Apatite of the Phosphoria formation to Regional Facies
Robert A. Gulbrandsen
Rocky Mountain Association of Geologists
... western A and South Carolina, and the western United States. A least-squares for e x p r e s s i o n y=a+bx least-squares line for the expression y=a+bx...
1971
Evaluation of Two Methods for Determining Soil Gas Permeabilities from Pneumatic Tests
Xun-Hong Chen
Environmental Geosciences (DEG)
... method provides the averaged parameter values, which are considered to best fit the measured data because this technique uses the nonlinear least squares...
1997
The South East Asia Gravity Project: Papua New Guinea
D. C. Manton, J. D. Fairhead
Papua New Guinea (PNG) Petroleum Convention Proceedings
... by a least squares method to produce cor rections for each cruise. Thus systematic errors can be minimised and a unified data set created. Linking Land...
1993
Paleomagnetism of the Upper Eocene Gries Ranch Formation, Grays Harbor County, Washington
Donald R. Prothero, Casey Burns
Pacific Section SEPM
... using the least squares method of Kirschvink (1980), and Fisher statistics were calculated for all three samples at this site. IRM acquisition analysis...
2001
Improved channel imaging using full-waveform inversion for deepwater Lingshui giant gas reservoir in South China Sea
Tao Wu, Dun Deng, Zijing Gong, Jie Cui, Rong Li, Lianlian Liu
International Meeting for Applied Geoscience and Energy (IMAGE)
...., 2015; D. Vigh et al., 2016). A workflow to integrate AdFWI, least-squares based FWI (LSFWI) and multi-scale common-image-point (CIP) tomography...
2024
A Technique for Identifying Hydrocarbons Using “Old Electric Logs” and Contemporary Sonic Logs
Lee Sanders
West Texas Geological Society
... of gas a day. Figure 2B displays the least-squares regression analysis for the data set in the “pay zone”. The mean sonic travel time is 71 microseconds...
1995
Time-lapse matching of OBN seismic data using 2D convolutional neural networks
Ramon C. F. Araújo, Gilberto Corso, Samuel Xavier-de-Souza, João M. de Araújo, Tiago Barros
International Meeting for Applied Geoscience and Energy (IMAGE)
... geometry used to model the baseline survey. Rectangle indicates the reservoir region. RESULTS The proposed method is compared against the least-squares...
2024
The Importance of the Pseudo N-D Logs in Petrophysical Analysis of Well Tembang-8ST4 (A Case Study)
Yana Hendrayana, Bowo Pangarso, Miftahul Firdaus
Indonesian Petroleum Association
... Regression (MLR). MLR allows us to predict an output log from a number of different input logs using a least squares regression routine, which finds...
2013
Abstract: Uncertainty Space for Microseismic Event Locations using a Double Difference Algorithm; #90174 (2014)
Timur Mukhtarov
Search and Discovery.com
... and Least Squares Problems. ACM Transactions on Mathematical Software, 8(2), 195-209. Waldhauser, F. and Ellsworth, W.L., 2000, A Double-Difference...
2014
High-fidelity GPR image super-resolution via deep-supervised machine learning
Kai Gao, Carly M. Donahue, Bradley G. Henderson, Ryan T. Modrak
International Meeting for Applied Geoscience and Energy (IMAGE)
... suppresses the RTM imaging artifacts at the two ends, a result that is usually available only by the least-squares imaging method. also develop...
2022
A method of relative impedance holography-inversion based on reflection coefficient inversion
Jiangfeng Zheng, Jialin Sun, Zongyu Zhen, Shaoxuan Li
International Meeting for Applied Geoscience and Energy (IMAGE)
...) for spectrum inversion. OMP algorithm can reduce the searching range evidently in each iteration by the least-squares method, and proves to be more...
2022
Structural Significance and Analysis of Mid-Continent Gravity High
Richard L. Coons , George P. Woollard , Garland Hershey
AAPG Bulletin
.... Exploration Geophysicists Yearbook, p. 267. Simpson, S. M., Jr., 1954, Least squares, polynomial fitting to gravitational data and density plotting...
1967
Obtaining Low Frequencies for Full Waveform Inversion by Using Augmented Physics
Eldad Haber, Eran Treister, Elliot Holtham
Petroleum Exploration Society of Australia (PESA)
... the problem of the lack of low frequencies by changing the misfit function from least squares to some other misfit. However, there is a fundamental...
2016