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The AAPG/Datapages Combined Publications Database
Showing 1,680 Results. Searched 200,293 documents.
Optimized downward continuation for the one-way wave equation in TTI media
Cosmin Macesanu, Faqi Liu
International Meeting for Applied Geoscience and Energy (IMAGE)
... coefficients a, b, . . . are usually estimated by a least squares fit to the exact function P, whose value depends on the direction of waves (encoded...
2022
Mineral Resource Estimation and Statistical Exploration
F. P. Agterberg
CSPG Special Publications
.... The method then proceeds by smoothing the intercept for any direction a by replacing it by the value of a parabola fitted by least squares to all intercepts...
1980
3D Seismic Data Interpolation by Frequency Domain Local 2D Prediction
Xishuo Wang
Search and Discovery.com
... ) on the CMP grid of (xmrNx, ymrNy), where Nx, & Ny define the input data block size (Nxtnx & Nytny to guarantee an overdetermined least squares system...
Unknown
3D Seismic Data Interpolation by Frequency Domain Local 2D Prediction
Xishuo Wang
Search and Discovery.com
... ) on the CMP grid of (xmrNx, ymrNy), where Nx, & Ny define the input data block size (Nxtnx & Nytny to guarantee an overdetermined least squares system...
Unknown
Abstracts: Ground Roll Attenuation Using LWD; #90173 (2015)
Ken Kocon and M. Sacchi
Search and Discovery.com
... Geophysicists (Ed.), 74th Annual International Meeting, Expanded Abstracts (2004). Theune, U., M. Sacchi, and D. Schmitt. “Least-squares local Radon transforms...
2015
Presalt time-lapse seismic monitoring with joint 4D FWI
Filipe Rudrigues, Gabriel Brando, Danilo Albuquerque, Danilo Froes, Benjamin Huard, Luis Cypriano, Roberto Pereira, Adel Khalil
International Meeting for Applied Geoscience and Energy (IMAGE)
... different types of surveys. Wang et al. (2017) show the importance of least-squares migration (LSM), as well as dedicated 4D processing, to attenuate...
2024
Abstract: How to Attenuate Diffracted Noise: (DSCAN) A New Methodology; #90211 (2015)
Ali Karagul, Todd Mojesky, XinXiang Li, and Necati Gulunay
Search and Discovery.com
... be subtracted from the record either by straight subtraction (Figure 1c) or by least squares subtraction, if desired. Figure 3a, 3b and 3c show...
2015
Theory and Methodology for Seismic Texture Analysis: Implications for Seismic Facies Visualization and Interpretation
Dengliang Gao
GCAGS Transactions
... with the model by calculating regression gradient based on a linear least-squares regression analysis. To minimize the impact of phase of wiggle traces...
2006
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
Abstract: Multi-trace Acoustic-impedance Inversion with Transform-domain Sparsity Promotion; #90174 (2014)
Sanyi Yuan, Shangxu Wang, Ning Tu, and Xiang Li
Search and Discovery.com
... data recovery with curvelet frames: Geophysical Journal International, 173(1), 233–248. Herrmann, F. J., and Li, X, 2011, Efficient least-squares...
2014
Abstracts: Determining Elastic Constants of an Orthorhombic Material by Physical Seismic Modeling; #90173 (2015)
Faranak Mahmoudian, Gary F. Margrave, P. F. Daley, and Joe Wong
Search and Discovery.com
... will be least-squares inverted for anellipsoidal deviation parameters E12 , E13 , E23 . Finally, using the relationships between anellipsoidal deviation...
2015
Machine learning and explainable AI for predicting missing well log data with uncertainty analysis: A case study in the Norwegian North Sea
Sushil Acharya, Karl Fabian
International Meeting for Applied Geoscience and Energy (IMAGE)
... regression, Principal Component Regression (PCR), Partial Least Squares Regression (PLSR), random forest, and bidirectional long short-term memory (Bi-LSTM...
2024
Abstract: A Ray+Waveform Inversion for the Potency Tensor; #90187 (2014)
Scott Leaney and Chris Chapman
Search and Discovery.com
...ng the generalized inverse, , computed using a complex SVD routine. The inversion process can be viewed as vector beam-forming, or least-squares tim...
2014
Land surface-related multiple attenuation based on wave-equation deconvolution
Gordon Poole, Brandon Li, Mattia Miorali, Keith Mills, John Tickle
International Meeting for Applied Geoscience and Energy (IMAGE)
... attenuation for land data using least- squares multiple imaging: PESGB PETEX Conference, Extended Abstracts. Pica, A., G. Poulain, B. David, M. Magesan...
2022
Comparison of the Descriptors of Sediment Grain-Size Distributions: DISCUSSION
Basanta K. Sahu
Journal of Sedimentary Research (SEPM)
... for computation of Edgeworth's estimators by nonlinear least squares method will be great and in view of the inaccuracies of sieve data (as pointed out in A above...
1971
Generating a New Approach for Continuous Reservoir Model Updating: Non-Gaussian Priors & Nonlinear Data Functions in EnKF (Paper P17)
S. Forghany, A. A. Asgari, T. Behrouz
Geological Society of Malaysia (GSM)
... zero becomes more practical specially in a closed-loop reservoir management setting. References Anderson, J. L., 2003. A Local Least Squares Framework...
2012
Abstract: Sub-Basalt Integrated Geophysical Study Islandmagee, Northern Ireland; #90171 (2013)
M. Best, R. Charters, K. Morrison, and C. Nahas
Search and Discovery.com
.... References Loke, M.H., and Barker, R.D., 1996, Rapid least-squares inversion of apparent resistivity pseudosections by a quasi-Newton method: Geophysical...
2013
Abstract: Sub-Basalt Integrated Geophysical Study Islandmagee, Northern Ireland; #90171 (2013)
M. Best, R. Charters, K. Morrison, and C. Nahas
Search and Discovery.com
.... References Loke, M.H., and Barker, R.D., 1996, Rapid least-squares inversion of apparent resistivity pseudosections by a quasi-Newton method: Geophysical...
2013
Generative modeling for inverse problems
Rami Nammour
International Meeting for Applied Geoscience and Energy (IMAGE)
... of acoustic data (pressure or displacement). This IP is nonlinear and large scale. Formulating its solution as an output least squares optimization problem...
2022
Empirical Relation Between Carbonate Porosity and Thermal Maturity: An Approach to Regional Porosity Prediction: DISCUSSION
Alton Brown
AAPG Bulletin
... of hydrocarbon reservoirs at all but shallowest depths. Dashed line is least squares fit of all reservoir porosities against depth (Table 1). Dotted lines...
1985
Examination of the Creaming Methods of Assessment Applied to the Gippsland Basin, Offshore Australia
D. J. Forman, A. L. Hinde
AAPG Special Volumes
... wells have been drilled plotted against new-field wildcat number. The straight line has been fitted by the least-squares method. Table 1. Values of r...
1986
Elastic reverse time migration with more than pressure data
Denes Vigh, James Xu, Xin Cheng, Zongcai Feng, Bing Bai
International Meeting for Applied Geoscience and Energy (IMAGE)
... provides affordable, accurate P/S separation. Feng (2017) outlined a way of extending the elastic RTM to least-squares mode, analyzing the artifacts...
2024
Improving reservoir imaging with FWI: A case study in the Columbus Basin, offshore Trinidad
Xiaolei Song, Simon Luo, Hu Jin, Imtiaz Ahmed, Akkel Paul, Nirala Boodoo, Ganyuan Xia, Sean Cardinez, Rodney Johnston
International Meeting for Applied Geoscience and Energy (IMAGE)
... with a conventional reverse-time migration image, FDR provides additional structural information with more balanced illumination thanks to a least-squares...
2024
Land seismic multi-parameter FWI imaging
Mason Phillips, James McLeman, Vlada Avramovic, Tom Rayment, Stuart Schmitt, Mike Varner, Yasser Khalifeh, Ahmad Ammar Chahine, Eskil Jersing
International Meeting for Applied Geoscience and Energy (IMAGE)
...—including all orders of multiples—when estimating the subsurface models. The inclusion of multi-scattering events, together with the least-squares...
2024
Criteria to Determine Borehole Formation Temperatures for Calibration of Basin and Petroleum System Models, #40463 (2009)
Kenneth E. Peters and Philip H. Nelson
Search and Discovery.com
... and temperature for each run, temperature extrapolation less than the range of temperature data, and deviations from the least squares regression line...
2009