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The AAPG/Datapages Combined Publications Database
Showing 1,680 Results. Searched 200,357 documents.
Abstract: Multi-component or Vector Dip Filtering Using the S-transform; #90187 (2014)
Kristof De Meersman and Majda Mihoub
Search and Discovery.com
... and compute the least-squares estimates of the amplitudes d c for the trace at the center. For the vertical component we get 2 d zc d zc cos( zc k x zc...
2014
Abstract: Robust Singular Spectrum Analysis for Erratic Noise Attenuation; #90187 (2014)
Ke Chen and Mauricio D. Sacchi
Search and Discovery.com
... (?). approximately got! SVD in their robust squares (IRLS) the estimate weights are least ˆ ! is the rank the reconstructed (M UV method based on randomized...
2014
Abstract: LSPSM for Pre-and Poststack Time Lapse Studies; #90187 (2014)
Abdolnaser Yousefzadeh and John C. Bancroft
Search and Discovery.com
... which may dominate the changes of the reflectivity model. The least squares prestack Kirchhoff migration (LSPSM) is performed separately on both...
2014
A method to evaluate pore structures of fractured tight sandstone reservoirs using borehole electrical image logging
Liang Xiao, Junran Li, Zhiqiang Mao, and Hongyan Yu
AAPG Bulletin
... and average fracture frequency of damage zones using a partial least squares statistical analysis: Implications for fault zone development: Journal...
2020
Probing deeper: On delineating basement features to investigate fractured aquifers in a rural community
Hendratta Ali, Manika Prasad, Ahmed Ismail, Njilah Isaac Konfor, Yene Atangana Joseph-Quentin, Oluseun Adetola Sanuade, Henry M. D. Agbogun, Mbida Yem, Alice Magha
International Meeting for Applied Geoscience and Energy (IMAGE)
... using smoothnessconstrained least squares inversion technique (Loke and Barker 1996). Several the ERT profiles will be acquired near the available...
2022
The processing method of ERI data based on irregular topography
Wang Hao, Huang Jianping, Li Zhenchun
International Meeting for Applied Geoscience and Energy (IMAGE)
... on inversion method of ERI data, least-squares inversion (Loke et al., 1996), the finiteelement method (Sasaki, 1994) have been proposed and applied...
2022
The Crude Oils of Wyoming—Product of Depositional Environment and Alteration
Richard D. McIver
Wyoming Geological Association
... oils of the Wind River Basin. The solid lines are the best least-squares lines for the data points shown. The dashed lines are the best least-squares...
1962
Application of Geophysical Method to Delineate Contamination in Waste Disposal Site of Ampar Tenang, Dengkil, Selangor D.E.
Abdul Rahim Samsudin, Umar Hamzah, Wan Zuhairi Wan Yaacob, Bahaa-eldin El Wali Abdel Rahim, Loh Yean Sze
Geological Society of Malaysia (GSM)
.... Electrical methods in geophysical prospecting. Oxford, Pergamon Press Inc. LOKE, M.H. AND BARKER, R.D., 1995. Least-squares deconvolution of apparent...
2003
Control and Adjustment of Surveys with the Magnetometer or the Torsion Balance
Donald C. Barton
AAPG Bulletin
..., 1924). T. W. Wright and J. F. Hayford, The Adjustment of Observations by the Method of Least Squares with Application to Geodetic Work, Van...
1929
Seismic Foldout: Gippsland Basin, Australia: New Data Provides Compelling Insights in Unexplored Areas
Jarrad Grahame, CGG
GEO ExPro Magazine
.... These included 3D joint source and receiver deghosting, the latest fullwaveform inversion and least-squares Q pre-stack depth migration (QPSDM...
2022
Seismic Foldout: Quad 35 Hybrid MC3Ds: Innovative multi-parameter FWI for near field exploration
Tor Akermoen, Jeroen Hoogeveen, GEOEX MCG, Kristen Berli, Seismic Partner, Tom Rayment, Percy Mellar
GEO ExPro Magazine
... waveform inversion delivers simultaneous model-building and full wavefield least-squares imaging directly from raw data, without the need...
2023
Quantitative X-Ray Diffractometry of Carbonate Rocks: RESEARCH METHOD PAPER
J. H. Fang, L. Zevin
Journal of Sedimentary Research (SEPM)
... with n unknown Rp. The least-squares solution for Equation 6 is given by [Rp] = [IspIsp]-1[Isp][1] (7) where Isp is the transpose matrix. ANALYTICAL...
1985
High-Resolution Deconvolution with Sparsity and Lateral Continuity Constraints
Juefu Wang
Search and Discovery.com
... Riel, 1990) and least-squares migration (Wang and Sacchi, 2006). One challenge for sparse inversion is that the algorithm can be unstable...
Unknown
Abstract: Compensation for Shear-wave Anisotropy Effects Above a Heavy Oil Reservoir; #90171 (2013)
Richard Bale, Kostya Poplavskii, and Colin Wright
Search and Discovery.com
... by visual inspection. A full analysis, using a robust least-squares method, was then performed which confirmed the initial estimates, and provided...
2013
High-Resolution Deconvolution with Sparsity and Lateral Continuity Constraints
Juefu Wang
Search and Discovery.com
... Riel, 1990) and least-squares migration (Wang and Sacchi, 2006). One challenge for sparse inversion is that the algorithm can be unstable...
Unknown
Abstract: Compensation for Shear-wave Anisotropy Effects Above a Heavy Oil Reservoir; #90171 (2013)
Richard Bale, Kostya Poplavskii, and Colin Wright
Search and Discovery.com
... by visual inspection. A full analysis, using a robust least-squares method, was then performed which confirmed the initial estimates, and provided...
2013
Abstract: Blind Surface Consistent Wavelet Estimation; #90187 (2014)
E. Bongajum, N. Kazemi, and M. D. Sacchi
Search and Discovery.com
.... In this study, we contend that (9) and (10) are equivalent to a surface consistent least squares problem for estimating the source and receiver operators...
2014
Abstract: Modified Euclids Blind Deconvolution Via Sparsity Optimization on a Sphere; #90187 (2014)
Nasser Kazemi and Mauricio D. Sacchi
Search and Discovery.com
... before and after deconvolution via SMBD, respectively. We also estimated the wavelet using the frequency-domain least squares estimator. The wavelet...
2014
Abstract: Time-lapse AVO Inversion; #90187 (2014)
A. Nassir Saeed, Laurence R. Lines, and Gary F. Margrave
Search and Discovery.com
... for the first iteration, which result in a traditional least-squares solution. The estimation of for i=1 is then subsequently substituted again in equation (7...
2014
Abstract: Statics Preserving Sparse Radon Transform; #90224 (2015)
Nasser Kazemi
Search and Discovery.com
... transformation without losing the data is not a trivial task. Hampson (1986) and Beylkin (1987) proposed a damped least squares solution to tackle the problem...
2015
Polarization Filter by Eigenimages and Adaptive Subtraction to Attenuate Surface-Wave Noise; #41565 (2015)
Stephen Chiu, Norman Whitmore, Michael Gurch
Search and Discovery.com
... use a time varying least squares Wiener match filter (Robinson and Treitel, 1980) because of its robustness in processing operations. The noise model...
2015
3D Aeromagnetic Mapping of the Williston Basin Basement; #41588 (2015)
Jiakang Li, Igor Morozov
Search and Discovery.com
... is the background field, and η is the Euler structural index. The method operates by solving the above over-determined equation using the least-squares method...
2015
Computer Mapping: A Review of What is Available and What is Useful for Exploration Purposes
Nigel M. Waters
CSPG Bulletin
... to isolate the regional pattern from the local variations in a spatial data set. The two most common methods involve either the least-squares fitting...
1981
Integrated rock classification in carbonate formations based on elastic and petrophysical properties estimated from conventional well logs
Mehrnoosh Saneifar, Roy Conte, Clotilde Chen Valdes, Zoya Heidari, and Michael C. Pope
AAPG Bulletin
... Symposium, Corpus Christi, Texas, July 6–9, 1982, p. 12–27.Levenberg, K., 1944, A method for the solution of certain problems in least squares...
2015
Mineral-chemistry quantification and petrophysical calibration for multimineral evaluations: A nonlinear approach
Douglas K. McCarty, Paul N. Theologou, Timothy B. Fischer, Arkadiusz Derkowski, M. Rebecca Stokes, and Ann Ollila
AAPG Bulletin
... distribution of trace elements can be performed using the non-negative least squares method. Here the measurement response coefficients for the trace...
2015