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The AAPG/Datapages Combined Publications Database
Showing 1,687 Results. Searched 201,049 documents.
Improvements on airborne gamma-ray spectrometry inversion
Jessica D. Weihermann, Yaoguo Li, Saulo P. Oliveira, Francisco J. F. Ferreira, Adalene M. Silva
International Meeting for Applied Geoscience and Energy (IMAGE)
..., notably in the represents an improvement over AGRS inversion, as ternary plots by reducing ambiguous false colors and traditional least-squares...
2024
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)
... by the presence of 4D noise are usually mitigated by designing filters that minimize least-squares differences between baseline and monitor data...
2024
The Value of Building a Multiscale, Regional Geomodel for Reserves Assessment of the Midland Basin
Robin Dommisse, Livia Sivila, Frank Male, H. Scott Hamlin
Unconventional Resources Technology Conference (URTEC)
... validation was used to validate the model. Without cross-validation, ML can provide unrealistically high R2 metrics. Ordinary least squares, Lasso, random...
2018
Dynamic Evolution and Overhang Development of Salt Structures in the North Louisiana Salt Basin: Quantitative Models
Kenneth Petersen , Ian Lerche , Allen Lowrie
GCAGS Transactions
... not exist an inverse procedure that is guaranteed to search a multi-dimensional set of parameters and also find the global least squares best fit...
1992
The Isotopic Age of the Flathead Sandstone (Middle Cambrian), Montana: NOTES
Sambhudas Chaudhuri, Douglas G. Brookins
Journal of Sedimentary Research (SEPM)
... method with a resultant age of 555 ± 18 m.y. and initial Sr (87/86) of 0.7183 ± 0.001 as determined by least squares analysis. A single Rb-Sr age...
1969
ReGenerating the Gippsland Basin
J. Firth, K. Zhao, S. Birdus, N. Mudge, J. Zhou
Petroleum Exploration Society of Australia (PESA)
... inversion (FWI) and least-squares Q pre-stack depth migration (LSQPSDM), are essential to stabilize AVO inversion and to improve the understanding...
2018
New Joint Categorical/Continuous Simultaneous Inversion Technology (Paper C9)
M. Kemper
Geological Society of Malaysia (GSM)
... the synthetic seismic Spp(θ) so obtained with the real seismic Sreal(θ). Use some optimization apparatus (e.g. the conjugate gradient method, or least squares...
2012
Settling Velocities of Natural Sand Grains in Air
Bingquan Cui, Paul D. Komar, Jumpei Baba
Journal of Sedimentary Research (SEPM)
... by simple least-squares linear regression of the logs of the values of the measured settling rates, Wm, versus the expected rate ws for a sphere having...
1983
Profiler-Sonobuoy Measurements in Colombia and Venezuela Basins, Caribbean Sea
William J. Ludwig , Robert E. Houtz , John I. Ewing
AAPG Bulletin
... in Figure 3. A plot of sediment-interval velocities versus one-way reflection time in the sediments appears in Figure 4 together with the least-squares...
1975
Compaction Curves
Brewster Baldwin , Crispin O. Butler
AAPG Bulletin
... and Halley (1982) show data with a scatter of some 20% at any given depth. They present a least-squares exponential fit. Their curve (Figure 4, curve S-H...
1985
Geothermal gradient and temperature of hydrogen sulfide-bearing reservoirs, Alabama continental shelf
Seiichi Nagihara, Michael A. Smith
AAPG Bulletin
... line is the linear, least-squares fit to the plot. Depth ranges of the H2S-bearing James and the Norphlet reservoirs are also indicated.For the data...
2005
Abstract: Inexact Full Newton Method for Full Waveform Inversion Using Simultaneous Encoded Sources; #90187 (2014)
Amsalu Y. Anagaw and Mauricio D. Sacchi
Search and Discovery.com
... techniques. Here, we adopt the conjugate gradient least-squares (CGLS) method to solve equation [8]. The CGLS scheme requires only the action of the Hessian...
2014
NW Shelf Digital Atlas A Tool for Regional Exploration
Adam Smith, Huw Edwards, Daryl Gould, Shane Westlake
Indonesian Petroleum Association
... this limitation, a combination of computer and manual interpretation incorporating additional well control was applied in those cases. A least squares...
2007
Correlation and Age of the Upper Jurassic Morrison Formation from Magnetostratigraphic Analysis
M. B. Steiner, S. G. Lucas, E. M. Shoemaker
Rocky Mountain Section (SEPM)
... 1062, p. 90 and 95. Kirschvink, J.L., 1980, The least-squares line and plane and the analysis of paleomagnetic data: Geophys. J., 62, p. 699–718...
1994
A Compensated Spectral Natural Gamma Ray* Logging System
C. Kessler, R. Washa, G. S. Yarbro
Indonesian Petroleum Association
... to be detected, which permits additional measurements of formation lithology in open holes and casing thickness in cased wells. The least squares calculation...
1984
MB Field Reservoir Simulation Study
Dodi Hidayat
Indonesian Petroleum Association
... 9. Figure 8. Sidewall Core Analysis Figure 9. Porosity versus Permeability (test) The least-squares regression fit of these data is: where...
1991
Simultaneous inversion of velocity and angle-dependent reflectivity
Nizar Chemingui, Yang Yang, Jaime Ramos-Martinez, Guanghui Huang, Dan Whitmore, Sean Crawley, Elena Klochikhina, Sriram Arasanipalai
International Meeting for Applied Geoscience and Energy (IMAGE)
... reflectivity reflectivity, equivalent to a non-linear least-squares RTM, is shown in Figure 2B. Importantly, the angle gathers (Figure 2C) were...
2023
Ultrasonic velocity tomography of rock sample
Tian Xie, Jiajia Zhang
International Meeting for Applied Geoscience and Energy (IMAGE)
...ps://doi.org/10.1190/segam2020-3428143.1. Qingyang, L., Y. Guo, Q. Cai, F. Meng, G. Qin, and N. Li, 2019, Multi-sources least-squares reverse time migrati...
2023
Application of Fourier Transform Infra-Red Spectroscopy in Determination of Reservoir Properties
John Woods
Indonesian Petroleum Association
... appropriate spectral reprocessing programs were applied which included second derivative and least squares to solve overlap issues for the mineralogy...
2014
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
Prestack Depth Imaging Within the Makassar Straits, Eastern Kalimantan, Indonesia
Chris Willacy, Suryadi Oemar, A. Edy Hermantoro, Paul Gilleran
Indonesian Petroleum Association
... traveltimes which are then evaluated for a least squares fit with the observed traveltime picks. The model is automatically updated in depth...
2000
Effects of Sea-Level Rise on Deltaic Sedimentation in South-Central Louisiana
John T. Wells
Special Publications of SEPM
... by constructing a non-linear least-squares fit to the data points for each flood year and extracting a value for subaerial land at the mean sea-level...
1987
Geophysics used to help find good quality groundwater in the Vientiane Plain, Lao PDR
Michael Hatch, Okke Batelaan, Eddie Banks, Somphasith Douangsavanh
Petroleum Exploration Society of Australia (PESA)
..., 1996. Rapid least-squares inversion of apparent resistivity pseudosections by a quasiNewton method, Geophysical Prospecting, vol. 44, 131-152...
2019
Robust phase-driven time warping FWI for salt reconstruction
Guanghui Huang, Alejandro Alcudia-León, Jaime Ramos-Martínez, Nizar Chemingu
International Meeting for Applied Geoscience and Energy (IMAGE)
... for overcoming cycle-skipping, to conventional least-squares FWI aimed at refining the velocity field. Our new approach prioritizes phase alignment between...
2024
Extended Abstract: Integrating Time-Lapse 3D (4D) Seismic Data with Reservoir Simulators
John Waggoner
Petroleum Exploration Society of Australia (PESA)
... s as the correlation between the two data sets, much as the difference in production data is quantified as the sum of least squares differences. Both the production...
2000