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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,621 documents.
Abstract: Time-varying Wavelet Estimation and Deconvolution; #90171 (2013)
Mirko van der Baan
Search and Discovery.com
... was an employee of the University of Leeds when the majority of this work was done. References Berkhout, A. J., 1977, Least-squares inverse filtering...
2013
Abstract: Processing 3-C Heavy Oil Data for Shallow Shear-wave Splitting Properties; #90174 (2014)
Richard Bale, Tobin Marchand, Keith Wilkinson, Kurt Wikel, and Robert Kendall
Search and Discovery.com
... = 1, ..., N, where A t 1 2 A1 t A2 t and ΔAt 1 2 (1) A1 t A2 t . Equation (1) can be inverted in a least-squares...
2014
Abstract: High Resolution 5D Interpolation: Measuring and Compensating for 5D Leakage; #90174 (2014)
Peter Cary and Mike Perz
Search and Discovery.com
... interpolation (Trad, 2009) generates the new data by using two constraints, a least-squares fitting constraint on the input data and a weighted L2-norm...
2014
Abstract: Petroleum Systems and Quantitative Oil Chemometric Models for Heavy Oils in Alberta and Saskatchewan to Characterize Oil-Source Correlations; #90174 (2014)
M. Fay, S. Larter, B. Bennett, L. Snowdon, and M. Fowler
Search and Discovery.com
..., alternating least squares (ALS) quantitative oil compositional models are used to calculate theoretical oil-source rock mixing ratios in the region...
2014
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
Abstract: How much well do you need in Acoustic Impedance Inversion?; #90174 (2014)
Heather J. E. Lloyd and Gary F. Margrave
Search and Discovery.com
... a single log containing well data from the surface to a depth of 2300 m. For the velocity log least squares linear gradient was applied...
2014
Abstract: AVAZ Inversion for Anisotropy Parameters of a Fractured Medium; #90174 (2014)
Faranak Mahmoudian, Gary F. Margrave, and Joe Wong
Search and Discovery.com
... form can be written as, Gnm6m61 Rnm1. (5) The unknown vector m will result from a damped least-squares inversion, as m (GT G )1GT R where...
2014
Abstract: Estimation of Dispersive Parameters of Surface Wave Using the Generalized S Transform; #90187 (2014)
Roohollah Askari and Robert J. Ferguson
Search and Discovery.com
... be solved using the least squares solution by finding an appropriate value for the wavenumber perturbation . The assumption is | | 1. The cost function...
2014
Abstracts: Three-dimensional Stress Orientations Determined by Anelastic Strain Recovery Measurements and their Comperison with Borehole Breakouts; #90173 (2015)
Weiren Lin
Search and Discovery.com
... strain tensor including orientations of the three principal strains can be determined by least-squares analysis (Figure 2 AAPG Search and Discovery...
2015
Abstract: Model Parametrization Strategies for Newton-Based Acoustic Full Waveform Inversion; #90224 (2015)
Amsalu Y. Anagaw
Search and Discovery.com
...) methods are used for full waveform inversion. Theory Waveform inversion often uses the least-squares misfit defined as the l2 norm of residual between...
2015
Overpressure and Hydrocarbon Accumulations in Tertiary Strata, Gulf Coast of Louisiana; #41000 (2012)
Philip H. Nelson
Search and Discovery.com
... the number of values in wells with numerous mud weight values, reducing the bias of over-reported wells. Pressure gradients were determined by least-squares...
2012
Understanding Attributes and Their Use in the Application of Neural Analysis Case Histories Both Conventional and Unconventional, #41473 (2014).
Deborah Sacrey, Rocky Roden
Search and Discovery.com
...-Based Coherence Least-Squares-Based Coherence AVO attribute volumes are computed from prestack data (gathers) . They include combinations of near...
2014
Using Multiple Downhole VSP Arrays for Monitoring and Locating Passive Microseisms in the Oil Reservoirs; #41561 (2015)
Zuolin Chen
Search and Discovery.com
... x 4 matrix of partial derivatives of t with respect to the four components of θe(xe,ye,ze,t0e) at final iteration of a least-squares hypocenter...
2015
3D Inversion of Time-Domain Electromagnetic Data for Ground Water Aquifers, #41610 (2015).
Elliot M. Holtham, Mike McMillan, Eldad Haber
Search and Discovery.com
... regularization functional. To minimize the non-linear objection function ϕ (m) we use the non-linear least squares method and reduce the data misfit until we...
2015
Analysis of Recent and Historical Salt-Crust Thickness Measurements and Assessment of their Relationship to the Salt Laydown Project, Bonneville Salt Flats, Tooele County, Utah
W. W. White III, Moises Terrazas
Utah Geological Association
... method). The CPS/PC program uses the least squares algorithm to extrapolate thickness values from the actual data points to grid nodes that comprise...
2006
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
REGIONAL TECTONIC SETTING OF THE HILLABEE GREENSTONE
James F. Tull, Stephen H. Stow
Alabama Geological Society
.... Petrology, v. 12, p. 1-65. Wright, T.L, and Doherty, P.C., 1970, A linear programming and least squares computer method for solving petroWright, T.L...
1979
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
Computer Sand Volume Determinations in the Long Beach Unit of the Wilmington Oil Field
Xenophon C. Colazas, Donald D. Clarke, John H. Robinson, Daniel D. Moreno
Pacific Section of AAPG
... and a weighted least squares fit of a. surface passing through the point is performed. Each point is weighted by its distance from the center point...
1980
Characterization of Fracture Networks Using Close-Range Photogrammetric Mapping and CIS Analysis
J.A. Coe, E.P. Nelson
Rocky Mountain Association of Geologists
... were calculated by using a least squares fit of digitized points to a planar surface (Dueholm, 1979). Residual errors, calculated by the least...
1997
No large bias within species between the reconstructed areas of complete and fragmented fossil leaves
Eric R. Hagen, Dana L. Royer, Ryan A. Moye, Kirk R. Johnson
PALAIOS
...-variables, unlike ordinary least-squares regression that only incorporates uncertainty in the dependent variable. SMA is appropriate when...
2019
Tensile radiation from slip in a medium with rough fractures
Scott Leaney, Chris Chapman
International Meeting for Applied Geoscience and Energy (IMAGE)
...) included a compliance coupling term in 2D modelling of single well imaging data and inverted using least-squares migration. While non-zero coupling...
2022
An adaptive filter-based approach for the Marchenko multiples elimination scheme
Rodrigo S. Santos, Marcelo S. Souza, Daniel E. Revelo, Victor Koehne, Reynam C. Pestana, Diego F. Barrera, Laila D. L. Vergne, Jonathas Maciel
International Meeting for Applied Geoscience and Energy (IMAGE)
... be balanced to satisfy the requisites of the MME. Santos et al. (2021) proposed to formulate the MME technique as a least-squares problem (LSMME...
2023
Evaluation of Factor Effects on Material Balance Calculations Using Statistical Design Methods
J. C. Hsie, H. M. Munir, W. E. Gerbacia
Indonesian Petroleum Association
... technique" and least squares method for best fit of the data points. Havlena and Odeh4 first modified the basic equation in the form Y = N + C X...
1993
The Age of the North Mokka Anticline, Axel Heiberg Island, Canadian Arctic Archipelago: an Application of the Paleomagnetic Fold-Test
K.C. Jackson, H.C. Halls
CSPG Bulletin
... and Its Mineral Deposits. Geological Association of Canada, Special Paper 20, p. 457-486. Kirschvink, J.L. 1980. The least-squares line and plane...
1985