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The AAPG/Datapages Combined Publications Database
Showing 1,462 Results. Searched 196,209 documents.
Influence of Depositional Sand Quality and Diagenesis on Porosity and Permeability: Examples from Brent Group Reservoirs, Northern North Sea
S. N. Ehrenberg
Journal of Sedimentary Research (SEPM)
... lines are least-squares fits to points with permeability > 1 mD. Short-dashed line in B shows trend rom unsorted data values in A\. Long-dashed curve...
1997
Carbon Isotope Composition of Natural Methane Occurrences: GEOLOGICAL NOTES
William M. Sackett
AAPG Bulletin
... in Oklahoma, and the highly carbonaceous, Jurassic, Posedonian shale from Germany were pyrolyzed at 500°C. The data and the least squares determined...
1968
Venture Gas Field, Offshore Nova Scotia: Case Study of Overpressuring in Region of Low Sedimentation Rate
Brett S. Mudford , Melvyn E. Best
AAPG Bulletin
... of one standard deviation of the least-squares value of the gradient. Overpressuring occurs in strata with present temperatures greater than 120°C...
1989
Abstract: Seismic Wave Attenuation due to Scattering and Leaky Mode Mechanisms in Heterogeneous Reservoirs; #90171 (2013)
Jun-Wei Huang, Gilles Bellefleur, and Bernd Milkereit
Search and Discovery.com
... mode were calculated from a least-squares fitting of amplitude logarithm versus arrival time of the two arrays. The receiver array is located...
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: Inversion Approach to Calculate Instantaneous Frequency; #90174 (2014)
Jiajun Han and Mirko van der Baan
Search and Discovery.com
... regularized least squares approach is to minimize Hf 2 2 2 Df 2 2 , where D is the classic Tikhonov regularization operator and is a scaling...
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
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
A Critique of the Magnolia Field (Columbia County) Case History
E. E. Rosaire , James M. Forgotson
GCAGS Transactions
..., such points fall on a scatter diagram, rather than a straight line, and least squares can be used to determine the relationship Del = a + b Dr Where Del...
1953
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
Regional Trends of Sandstone Porosity Versus Vitrinite Reflectance—A Preliminary Framework
James W. Schmoker, Timothy C. Hester
Rocky Mountain Section (SEPM)
... are ordinary least-squares regression lines with Rm as the independent variable. A given Rm measurement is the mean of tens of individual reflectance...
1990
A Comparison of Air Photograph and Computer Simulated Wave Refraction Patterns in the Nearshore Area, Richibucto, Canada and Jervis Bay, Australia
Edward A. Bryant
Atlantic Geology
... the programs occurs with this interpolation of depth from a regular gridded matrix. The Wilson program uses a least squares fitting based upon the four...
1974
Prediction of Abnormal Pressure Based on Seismic Data: A Case Study of Exploratory Well Drilling in Pertamina UEP I and UEP II Work Areas
P. Manik, P. A. Soedaldjo
Indonesian Petroleum Association
... be drawn statistically (least squares method). The ITT points which are located to the left of the normal compaction trend line form a subnormal zone...
1984
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
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
AVO and Inversion Contribute to Makassar Exploration Efforts
William L. Soroka, Herry Andiarbowo, Anung Widodo
Indonesian Petroleum Association
.... The inversion builds a layered acoustic impedance (least-squares best fit) model from which a reflectivity series can be computed. With a good result...
1995
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