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The AAPG/Datapages Combined Publications Database

Showing 178 Results. Searched 188,628 documents.

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Compositional Fidelity of Subfossil Mollusk Assemblages in Streams and Lakes of the Southeastern Pampas, Argentina

Eleonor Tietze, Claudio G. De Francesco


... autocorrelation is an inevitability of the natural world, making ecological variables more similar the nearer they are measured along spatial gradients...


Evaluation of oxygen isotope and Sr/Ca ratios from a Maldivian scleractinian coral for reconstruction of climate variability in the northwestern Indian Ocean

David Storz, Eberhard Gischler, Jens Fiebig, Anton Eisenhauer, Dieter Garbe-Schönberg


..., when ordinary least square correlations are not significant. As two additional statistical methods, we applied autocorrelation functions...


New Seismic Method in Populated Areas (A Case Study in the Surabaya Area, East Java, Indonesia)

Suyitno Patmosukismo, A. Syahbuddin, G. Alameda

Indonesian Petroleum Association

... of reflexion coefficients. ACFY(t): Autocorrelation function of the emitted sequence. The symbol * represents the convolution operator. If one...


Application of Data Analytics for Production Optimization in Unconventional Reservoirs: A Critical Review

Srikanta Mishra, Luan Lin

Unconventional Resources Technology Conference (URTEC)

... (KM) - Models the response as a trend term with an autocorrelation structure, where neighboring observations have similar responses [10]  Self...


The economic environment and the growth in reserves from known gas fields in the Gulf of Mexico

Kevin F. Forbes, Ernest M. Zampelli

CSPG Bulletin

... using fixed effects estimation. Reported standard errors are robust to heteroskedasticity and intragroup autocorrelation. The results for each...


Three-Dimensional Seismic Modeling and Seismic Facies Imaging

Hongliu Zeng , Noel Tyler , Milo M. Backus

GCAGS Transactions

... autocorrelation at each grid node. The rock-properties of the shaly units and the total stratal thickness of each sand-shale pair were interpolated...


Field and Modelling Studies of Cambrian Carbonate Cycles, Virginia Appalachians: DISCUSSION

Michael G. Kozar, Lawrence J. Weber, Kenneth R. Walker

Journal of Sedimentary Research (SEPM)

... spectral analysis and autocorrelation analysis (Schwarzacher and Fischer 1982; Goldhammer et at. 1987). However, these methods are not easily applicable...


Squeezing Every Last Drop Out of a Coarse 3D Oil Sands Dataset for Refining 3D Survey Design … A Case History; #41500 (2014)

Sylvestre Charles, Jim Hostetler, Jiwu Lin, Xiaoming Luo

Search and

... migration (60 fold). Figure 4. Test shot gathers and autocorrelation plots from a deep time window. Figure 5. COCA plots at two different locations: very...


The Origin of High-Frequency Platform Carbonate Cycles and Third-Order Sequences (Lower Ordovician El Paso Gp, West Texas): Constraints from Outcrop Data and Stratigraphic Modeling

R. K. Goldhammer, P. J. Lehmann, P. A. Dunn

Journal of Sedimentary Research (SEPM)

..., we made time-series tests, both autocorrelation and maximum-entropy spectral analysis, on the cycle data; see Dunn (1991) for techniques. By time...


Spectral Analysis of the Middle Triassic Latemar Limestone

Linda A. Hinnov, Robert K. Goldhammer

Journal of Sedimentary Research (SEPM)

...", this method computes the autocorrelation function of a time series out to lag M (with M <= N/3), tapers this function, and applies a (real-valued) Fourier...


Chapter 9. Australia: Satellite Lineaments in Southeast Australia

K. L. Burns, J. Shepherd

Utah Geological Association

...) are the azimuths of faults which precisely coincide with ERTS lineaments in ground location. Curves (5) and (8) are autocorrelation functions for dolerite...


Tidal Cycles: Annual Versus Semi-Lunar Records

Bernadette Tessier

Special Publications of SEPM

... and autocorrelation MARTINO, R. L., AND SANDERSON, D. D., 1993, Fourier and autocorrelation analysis of estuarine tidal rhythmites, lower Breathill Formation...


Mapping and Quantifying the Clay Aggregate Microporosity in Medium- to Coarse-Grained Sandstones Using the 14C-PMMA Method

Paul Sardini, Abderrazak El Albani, Dimitri Pret, Stephane Gaboreau, Marja Siitari-Kauppi, Daniel Beaufort

Journal of Sedimentary Research (SEPM)

... of Investigations 2001, v. 2, Saskatchewan Geological Survey, Miscellaneous Report 2001-4.2, p. 240–251. Rubin, D.M., 2004, A simple autocorrelation algorithm...


Identification of Shale Sweet Spots Using Kep Property Estimates from Log Analysis and Geostatistics

Larry Chorn, Jeffery Yarus, Suzanne del Rosario-Davis, Jason Pitcher

Unconventional Resources Technology Conference (URTEC)

.... In quarter-sections where the property quality varies rapidly with distance (i.e., low autocorrelation in latitude and longitude), the mean property...


Regional Stratigraphic Analysis of a Pennsylvanian Carbonate Shelf and Margin in Kansas

W. Lynn Watney, Ricardo A. Olea, John C. Davis

Kansas Geological Society

..., outcrops, and wireline logs. Correlations of natural gamma-ray response within these genetic units were derived using computer-assisted autocorrelation...


Use of Thousand-Channel Seismic in Canning Basin

A. Moore, E. Allison

Petroleum Exploration Society of Australia (PESA)

... of the central peak of the Autocorrelation of the pilot sweep. Cmax N =t ~ - I P, . P, = N t ~ I P 2, = Since in a sign-bit system a sample P can only...


A Review of Seismic Acquisition Trials and Procedures in the Cooper Basin, South Australia

J. R. Hughes, N. A. Fitzgerald

Petroleum Exploration Society of Australia (PESA)

... source wavelet (produced by the autocorrelation of the sweep) for a series of comparisons made at single VP locations at each side of a well location...


Shallow Water Seismic Operations on the North West Shelf

T. J. Allen, D. Brown, J. Wardell

Petroleum Exploration Society of Australia (PESA)

... 7 and 8 are autocorrelograms of the records in Figures 5 and 6, respectively. The autocorrelogram is simply an autocorrelation of each trace...


Modeling the Semivariogram: New Approach, Methods Comparison, and Simulation Study

A. Gribov, K. Krivoruchko, J. M. Ver Hoef

AAPG Special Volumes

... of autocorrelation that is used to obtain a default lag size for the grid method in estimating the empirical semivariogram or covariance (see stage 2 below). Based...


Exploration of the North Seribu Area, Northwest Java Sea

Roberto Fainstein

Indonesian Petroleum Association

... shown (Fig. 12) is minimum phase the final data is zero phase and may be obtained by autocorrelation of all the individual record traces. Therefore...


Integrated reservoir characterization of low resistivity thin beds using three-dimensional modeling for natural gas exploration

Lim Yen Jun, Lo Shyh Zung

Geological Society of Malaysia (GSM)

..., autocorrelation of reflectivity and white noise factor. This method can effectively determine optimal time shift between well log reflectivity...


Application of Isotope Chronostratigraphy in the Northern Gulf of Mexico

Douglas F. Williams, Dwight Trainor

GCAGS Transactions

... methods (i.e., autocorrelation, cross-correlation, spectral analysis, etc.) makes Isotope Chronostratigraphy a powerful technique. Integration...


Horse Canyon Field, A 3-D Seismic Model for Upper lsmay Algal Mound Production, Southern Paradox Basin, Utah

Richard O. Louden, Donald D. Lehman, Walter E. Johnson, Duncan L. Edwards

Rocky Mountain Association of Geologists

... map of the 3-D data volume using properties of the amplitude and autocorrelation. Figure courtesy of TriCon Geophysical, Inc. The Rocky Mountain...


Estimating Exploration Potential

W. W. Hambleton, J. C. Davis, J. H. Doveton

AAPG Special Volumes

... by the functional relationship. (The "uncertainty" function shown in Figure 7 is a simple spatial autocorrelation model and has much in common...


Pre-Alleghenian (Pennsylvanian-Permian) Hydrocarbon Emplacement Along Ordovician Knox Unconformity, Eastern Tennessee

Frederick M. Haynes , Stephen E. Kesler

AAPG Bulletin

... autocorrelation (holes "predict" organic content of adjacent holes), thus precluding traditional inferential statistical analysis (Clark and Hosking, 1986...


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