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The AAPG/Datapages Combined Publications Database

Showing 4,574 Results. Searched 195,354 documents.

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Theory and Applications of Time Series Analysis to Wireline Logs: Chapter 5

John H. Doveton

AAPG Special Volumes

..., An algorithm for the machine computation of complex Fourier series: Mathematical Computation, v. 19, p. 297-301. Cox, D. R., and P. A. W. Lewis, 1966...

1994

An Exact Method for Characterization of Grain Shape

Robert Ehrlich, Bernhard Weinberg

Journal of Sedimentary Research (SEPM)

...) For the purpose of evaluation, it is convenient to transform the Fourier series of equation (1) to the form [EQUATION (7) wherein the transformations...

1970

Optical Data Processing of Multispectral Photographs of Sedimentary Structures

Howard J. Pincus , Syed A. Ali

Journal of Sedimentary Research (SEPM)

... beam. The resulting diffraction pattern is the two-dimensional Fourier transform of the input, in this case a photograph. Frequency distributions...

1968

Fourier Grain-Shape Analysis of Coastal and Inner Continental-Shelf Sand Samples: Oceanside Littoral Cell, Southern Orange and San Diego Counties, Southern California

Robert H. Osborne, Chia-Chen Yeh

Special Publications of SEPM

... employed in this report makes use of the newer This and more widely used Fast Fourier Transform FFT involves the calculation of many values...

1991

A Semi-analytical Solution of the Induced Stress Change in a Layered Reservoir Based on the Stress Formulation

Shihao Wang, Yanbin Zhang, Ouassim Khebzegga, Bin Wang, Zhe Liu, Xian-Huan Wen

Unconventional Resources Technology Conference (URTEC)

... rocks. We apply Fourier’s transform to the governing hydromechanical equation and enforce continuity conditions on the interfaces between neighboring...

2022

Optimal Configuration and Information Content of Sets of Frequency Distributions

William E. Full , Robert Ehrlich, Stephen K. Kennedy

Journal of Sedimentary Research (SEPM)

... southern Monterey Bay, California--Fourier shape analysis: Jour. Sed. Petrology, v. 49, p. 727-732. SHANNON, E., 1948, The mathematical theory...

1984

Seismic Modelling in 3D for Migration Testing

Search and Discovery.com

... frequency, F is the 2D Fourier transform over the lateral spatial coordinates, F−1 is its inverse, ψsource is a mathematical model of the source, and iz k 2...

2013

Analysis of Spatial Order in Sandstones II: Grain Clusters, Packing Flaws, and the Small-Scale Structure of Sandstones

Christopher M. Prince, Robert Ehrlich, Yannick Anguy

Journal of Sedimentary Research (SEPM)

... to be associated with enhanced fluid flow. Using a two-dimensional Fourier transform it is possible to identify these flawed zones and examine not only...

1995

Magneto-Telluric Method Applied to Geothermal Prospecting*

Gerard Cormy

Southeast Asia Petroleum Exploration Society (SEAPEX)

... on an analysis method which does not use the Conventional Fourier transform. In fact, the recording method provides for a new concept in analysis...

1975

Spectral Decompostion for a More Accurate Image; #41807 (2016)

Rongfeng Zhang

Search and Discovery.com

.... There are several ways of performing spectral decomposition of seismic data in terms of the mathematical method adopted, such as short-time Fourier transform...

2016

Improvement of inverse scattering angle-domain common image gathers using optical flow

Ammir A. Karsou, Sérgio L. E. F. da Silva, Felipe V. Capuzzo, Felipe T. Costa, Jorge Lopez, Roger M. Moreira, Marco Cetale

International Meeting for Applied Geoscience and Energy (IMAGE)

... a frequency-wavenumber Fourier transform. Then, a local plane wave decomposition is used to apply the imaging condition for each angle estimated...

2023

Methodology for Enhancing and Evaluating Geologic Effects of Time Series Models: A Case of Ground Response in Santa Clara Valley, California, #41097 (2012)

Olusola Samuel-Ojo, Lorne Olfman, Linda A. Reinen, Arjuna Flenner, David D. Oglesby, Gareth J. Funning

Search and Discovery.com

... Fourier Transform algorithm for Averaging, Laplacian and Laplacian of Gaussian (LoG) filter. Filtering is a procedure that visits each element...

2012

Abstract: Wide Azimuth Interpolation; #90211 (2015)

Daniel Trad, Jeff Deere, and Scott Cheadle

Search and Discovery.com

... is to regularize the data; this is to move the traces to a regular grid. Antileakage Fourier Transform (Xu et. al, 2005) and the pyramid transform (Hung et...

2015

A Comparison of Fourier and Fractal Techniques in the Analysis of Closed Forms

Stephen K. Kennedy, Wei-Hsiung Lin

Journal of Sedimentary Research (SEPM)

...A Comparison of Fourier and Fractal Techniques in the Analysis of Closed Forms Stephen K. Kennedy, Wei-Hsiung Lin 1992 Vol. 62 No. 5. (September...

1992

Structure-and-Amplitude-Preserving Multi-Channel Deconvolution

Search and Discovery.com

... the following operations: converting data to the FX domain via the Fourier transform, applying a spatial prediction filter and converting back to the TX domain...

2013

Low Frequency Shadow Zone Analysis Based on CWT Spectral Decomposition: Case Study of South Sumatra Basin

Abdul Haris, I Nengah Suabdi, Erwinsyah, Adriansyah, Abdullah Nurhasan, Ahsanul Khair, Ian A. Kainama

Indonesian Petroleum Association

.... A common technique to obtain a time-frequency map is the Short Time Fourier Transform (STFT), which has time-frequency resolution resulting from...

2008

COMPUTER TECHNOLOGY

Brian Shaw

Journal of Sedimentary Research (SEPM)

...COMPUTER TECHNOLOGY Brian Shaw 1981 Vol. 51 No. 2. (June), The rapid rise in the application of statistical, mathematical, and computational...

1981

Computer Mapping: A Review of What is Available and What is Useful for Exploration Purposes

Nigel M. Waters

CSPG Bulletin

... of the Symposium on Mathematical Statistics and Computer Applications in Ore Valuation, Johannesburg, p. 124-141. Whitten, E. H. T., 1979, Review of Probability...

1981

Enhancing the Quality of Seismic Impedance Data; #41961 (2016)

Satinder Chopra, Ritesh Kumar Sharma, Rebecca Daniels, Brian Schulte, Jim Pllishy, Tammy Chow

Search and Discovery.com

...-t domain. The other domains to which seismic data in the x-t domain can be transformed are the tau-p (using Radon transform) and f-x (using Fourier...

2016

Abstracts: Prestack Interpolation of a Sparsely Acquired and Heavily Structured 3D Land Data Set; #90173 (2015)

Dan Negut, Dave Ganley, Muyi Kola-Ojo, Dennis Quinn, Juefu Wang, Angela Truong, and David Emery

Search and Discovery.com

..., Canada [email protected] Summary Two different prestack interpolation methods, 5D interpolation by Fourier reconstruction and dip-scanbased...

2015

Textural and Diagenetic Controlson Sandstone Permeability

Christopher M. Prince

GCAGS Transactions

... a better relationship with permeability. End_Page 43------------------------ 2-D Fourier Analysis A 2-D Fourier transform is used to decompose images...

1999

Identifying Spikes in Sonic Slowness and in Resistivity in the Tuscaloosa Marine Shale Using Continuous Wavelet Transform

Carol Wicks, Samiha Naseem

GCAGS Journal

... is a Fourier Transform windowing technique that uses variable sized windows. Mathematically, the wavelet analysis is a convolution of a wavelet function...

2017

Petroleum Exploration--Real World Examples Using Microcomputers: ABSTRACT

R. Mark Maslyn

AAPG Bulletin

... of double Fourier series to model oil-productive paleotopography in the eastern Powder River basin of Wyoming. Geophysicists are more accustomed...

1982

Grain Size-Frequency Distributions from Thin-Section Data: NOTES

N. H. Gray

Journal of Sedimentary Research (SEPM)

...Grain Size-Frequency Distributions from Thin-Section Data: NOTES N. H. Gray 1969 Vol. 39 No. 4. (December), A general mathematical technique...

1969

Polynomial Amplitude versus Azimuth Inversion in Horizontally Transverse Isotropic Media, as Tested on Fractured Coal Seams in the Surat Basin

Joseph Kremor, Randall Taylor, Khalid Amrouch

Australian Petroleum Production & Exploration Association (APPEA) Journal

... using the elliptic approximation (Rüger 1998) or by using a Fourier transform (Downton and Roure 2015). Wavelet deconvolution iso To extract...

2017

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