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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,616 documents.
Groundwater Investigation Using Electrical Resistivity Imaging Technique at Sg. Udang, Melaka, Malaysia
Zeinab Asry, Abdul Rahim Samsudin, Wan Zuhairi Yaacob, Jasni Yaakub
Geological Society of Malaysia (GSM)
..., M.H. & Barker, R.D., 1995. Least-squares deconvolution of apparent resistivity pseudosections. Geophysics, 60: 1682–1690. Loke, M.H., 1997...
2012
Enhanced Wellbore Placement Accuracy Using Geomagnetic In-Field Referencing and Multi-Station Correction
Stefan Maus, Matthew Herzl, Shawn DeVerse
Unconventional Resources Technology Conference (URTEC)
... errors are determined over multiple surveys, the method of least squares can be used to estimate the bias and scale error of each sensor. Once...
2015
A Critical Review on Microbial Enhanced Oil Recovery Using Artificial Sandstone Core: Mathematical Model
Farizal Hakiki
Indonesian Petroleum Association
... and are determined simultaneously by the least squares method based on experimental data. Viscosity Model Pelofsky’s viscosity correlation is seen in Equation (5...
2014
Bayesian uncertainty quantification for reservoir parameter changes estimated from time-lapse machine learning
Jinsong Chen, Chang Li, Lei Wei, Anusha Sekar, Maisha Amaru
International Meeting for Applied Geoscience and Energy (IMAGE)
... and Exhibition, Paper Number SPE-146771-MS, doi: https://doi.org/10.2118/146771-MS. Li, C., M. Meadows, and T. Dygert, 2019, Warping least-squares inversion...
2024
Horizon Modeling using a Three-Dimensional Fault Restoration Technique
Karen S. Hoffman, John W. Neave
Indonesian Petroleum Association
... and contouring two-dimensional surfaces. Gridding techniques such as minimum tension, least squares, or nearest neighbor are among the most popular, as well...
2000
Theory of Nuclear Transmission Densitometry Applied to Sedimentology and Geotechnology
Peter V. Meyers, Wesley J. Van Sciver, Adrian F. Richards
Journal of Sedimentary Research (SEPM)
... relationship with -1sat given in m3/kg. The line intermediate between m = 2500 and 2900 kg/m3 is a computer-drawn least squares fit to the 1680 data...
1974
A Simple Photogrammetric Method to Improve Quantitative Image Analysis in Geoscience Research: RESEARCH METHODS PAPERS
Jesus E. Caracuel, Javier Cardenal, Jorge Delgado-Garcia, Santiago Garcia-Lopez
Journal of Sedimentary Research (SEPM)
... information about morphology, spatial distribution, and linear or surface measurements of features. The simplest and least time-consuming method is taking...
2000
Physics-Informed Machine Learning Approach for Closed-Loop Reservoir Management Using RGNet
Zhenyu Guo, Sathish Sankaran
Unconventional Resources Technology Conference (URTEC)
.... (2002). Weighted least squares support vector machines: robustness and sparse approximation. Neurocomputing, 48(1), 85–105. Suykens, J. A. K...
2024
Rate of Penetration (ROP) Modeling Using Hybrid Models: Deterministic and Machine Learning
Chiranth Hegde, Cesar Soares, K. E. Gray
Unconventional Resources Technology Conference (URTEC)
... to the final ROP model. The least squares algorithm is used to minimize the 𝑙2 norm. The premise of using linear regression is that ROP predictions from...
2018
Pore structure of sediments from Green Canyon 955 determined by mercury intrusion
Hugh Daigle, Yi Fang, Stephen C. Phillips, and Peter B. Flemings
AAPG Bulletin
... shapes. Using nonlinear least squares optimization, we were able to fit this model to our data successfully at low capillary pressures, but the results...
2022
New Methods for Assessment of Permeability and Saturation-Dependent Relative Permeability in Tight Rock Samples
Sabyasachi Dash, Zoya Heidari
Unconventional Resources Technology Conference (URTEC)
... of the magnetization decay is done using Lawson and Hanson’s nonnegative least square regression method (Lawson and Hanson 1995; Aster et al. 2005...
2024
Normal Geothermal Gradient in United States
C. E. Van Orstrand
AAPG Bulletin
...) the solution of which by the method of least squares gives EQUATION (5) the residuals (v1, v2, ... vn) being subject to the condition EQUATION (6) Following...
1935
Machine learning-based residual moveout picking
Farhad Bazargani, Wenjun Zhang, Anu Chandran, Zaifeng Liu, Harry Rynja
International Meeting for Applied Geoscience and Energy (IMAGE)
... Adler, F., R. Baina, M. A. Soudani, P. Cardon, and J.-B. Richard, 2008, Nonlinear 3D tomographic least-squares inversion of residual moveout in kirchhoff...
2022
Estimation of helical fiber pitch angle and trace spacing from colocated DAS, accelerometer, and geophone datasets
Kevin W. Hall, Don C. Lawton, Kristopher A. Innanen
International Meeting for Applied Geoscience and Energy (IMAGE)
.... Monsegny, J. E., K. W. Hall, D. O. Trad, and D. C. Lawton, 2021, Least-squares DAS to geophone transform: First International Meeting for Applied...
2022
Use of Automatic Moment Tensor Inversion in Real Time Microseismic Imaging
Michael Kratz, Michael Thornton
Unconventional Resources Technology Conference (URTEC)
... and Richards, 1980). A least squares inversion (Sipkin, 1982) is utilized for the full moment tensor solution. This provides a general fit solution...
2015
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
Stress State Derived from Microseismicity Induced by Hydraulic Fracturing: Downhole and Surface Monitoring
Zuzana Jechumtálová, František Stanĕk, Leo Eisner, G.Randy Keller
Unconventional Resources Technology Conference (URTEC)
...ed to increase (by a factor 2) the importance of the clear P-wave amplitudes and compensate for the larger S-wave amplitudes in the least-squares inversi...
2016
From well logs to 3D models: A case study of automated stratigraphic correlation in the Midland Basin
Keyla Gonzalez, Zoltan Sylvester, Alejandro Valenciano, Ben Lasscock
International Meeting for Applied Geoscience and Energy (IMAGE)
... is left unconnected from the graph, it is removed from the analysis. Using least-squares optimization, ChronoLog creates a consistent set of pairwise depth...
2024
Soft soils: A study on their electrical resistivity values and geotechnical properties (porosity, SPT and particle size distribution)
Najmiah Rosli, Rosli Saad, Nazrin Rahman, Nur Azwin Ismail
Geological Society of Malaysia (GSM)
... an existing borehole. The measured 2-DRI data was then subjected to least-squares inversion in conjunction with a smooth constraint to obtain true...
2020
Quantitative Interpretation of Sedimentary Structures Formed by River Dunes
Suzanne F. Leclair, John S. Bridge
Journal of Sedimentary Research (SEPM)
... of bedform heights, h: p(h = h - 1e-h//() [EQUATION (2)] where and can be estimated using least-squares minimization techniques (Press et al. 1986...
2001
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
Insights into the Regional Evolution of the Outer Fold-and-Thrust Belt, Niger Delta, from Combining New Techniques in 3-D Sequential Geomechanical Restoration with Decompaction; #41026 (2012)
Pauline Durand-Riard and John H. Shaw
Search and Discovery.com
....-M. Morvan, 1997, A least-squares method for multisurface unfolding: Journal of Structural Geology, v. 19/5, p. 735-743. Maerten, L., Gillespie, P...
2012
Tracerscan – A Spectroscopy Technique for Determining the Distribution of Multiple Radioactive Tracers in Downhole Operations
L. L. Gadeken, H. D. Smith Jr., Choung Nguyen
Indonesian Petroleum Association
... spectroscopy logging. This elemental separation can be achieved using spectral stripping techniques6 or using a weighted least-squares algorithm similar...
1986
Towards more accurate reservoir imaging using FWI: An OBN case study at Trion
Zhen Wang, Sen Mei, Zhuocheng Yang, Joakim Blanch, Ezequiel Genova, Juan-Mauricio Florez-Nino, Humberto Salazar-Soto, Alfredo Vazquez-Cantu
International Meeting for Applied Geoscience and Energy (IMAGE)
... models, which led to better migrated images from least-squares (LS) Kirchhoff and reverse time migration (RTM). However, the reservoir image below...
2022
U-Th-Pb Systematics of Precambrian Rocks in the Laramie Mountains, Wyoming
I. T. Nkomo, J. N. Rosholt, J. R. Dooley, Jr.
Earth Science Bulletin (WGA)
.... (1969), Least-squares fitting of straight line with correlated errors: Earth and Planet. Sci. Lett., v. 5, pp. 320–324. Zartman, R. E. (1965...
1979