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The AAPG/Datapages Combined Publications Database

Showing 4,115 Results. Searched 187,797 documents.

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Abstract: Properties of Gabor Operators for Seismic Imaging; #90171 (2013)

Michael P. Lamoureux and Gary F. Margrave

Search and Discovery.com

... multipliers used in seismic imaging. Theory of Gabor transforms and multipliers The Gabor transform of a signal is given as a localized Fourier transform...

2013

Abstract: Inversion Approach to Calculate Instantaneous Frequency; #90174 (2014)

Jiajun Han and Mirko van der Baan

Search and Discovery.com

.... The short-time Fourier transform with a 170ms time window (Figure 4) does not distinguish the two Ricker wavelets clearly at 1.1s due to its fixed time...

2014

Abstract: Empirical Mode Decomposition Based Instantaneous Spectral Analysis and its Applications to Heterogeneous Petrophysical Model Construction; #90171 (2013)

Jun-Wei Huang and Bernd Milkereit

Search and Discovery.com

..., such as windowed Fourier transform, wavelet transform, S-transform and Matching Pursuit Decomposition, etc. This paper described the Hilbert-Huang...

2013

Computer Modeling of Minnelusa Formation (Pennsylvanian-Permian) Paleotopography in Eastern Powder River Basin, Wyoming: ABSTRACT

R. Mark Maslyn

AAPG Bulletin

... mi (5 km). Double Fourier transforms are most appropriately used in modeling where such a cyclicity exists. The resulting double Fourier transform...

1982

Abstracts: Empirical Mode Decomposition and Robust Seismic Attribute Analysis; #90173 (2015)

Jiajun Han and Mirko van der Baan

Search and Discovery.com

... that obtained using traditional time-frequency analysis tools, such as Fourier transform and wavelet transforms. Also known as the Hilbert-Huang transform...

2015

Abstracts: Gabor Multipliers for Seismic Modeling and Wavefield Propagators; #90173 (2015)

Michael P. Lamoureux, Gary F. Margrave, and Peter C. Gibson

Search and Discovery.com

... by Gabor multipliers and generalized frame operators. These numerical algorithms are based on a localized version of the Fourier transform and share many...

2015

An Application of Optical Fourier Analysis to the Study of Geological Linear Features in ERTS-1 Imagery of California

Aderbal C. Corrêa, Ronald J. P. Lyon

Utah Geological Association

... beam passing through a transparent reduction of the map. The diffraction pattern obtained in such a way is the two-dimensional Fourier transform...

1974

Seismic Time-Frequency Analysis by Empirical Mode Decomposition; #41513 (2015)

Jiajun Han, Mirko van der Baan

Search and Discovery.com

... Fourier transform. Application on field data thus offers the potential of highlighting subtle geologic structures that might otherwise escape...

2015

Abstract: Reflectivity Color Correction in Gabor Deconvolution; #90211 (2015)

Carlos Montana and Gary Margrave

Search and Discovery.com

...) is the reflectivity, and where Q is the attenuation parameter and H indicates the Hilbert transform operation. Equation (2) states that the Fourier transform...

2015

Utilizing Variably Integrated Spectral Frequency to Extract Entire Fluvial Systems

Pongthep Thongsang, Mirza Naseer Ahmad

Indonesian Petroleum Association

.... Although it is not an absolute values as Fourier transform but it measures similarity between a mother wavelet and a seismic signal (relative frequency...

2013

Mackenzie Delta: A Case of One Residual Gravity Anomaly and 16 Dry Exploration Wells; #41587 (2015)

Hassan Hassan

Search and Discovery.com

... in the Foothills of Northeastern British Columbia using 2D Wavelet Transform* Hassan Hassan1 Search and Discovery Article #41587 (2015)** Posted March 16...

2015

Optical Methods and Equipment for Processing Geophysical Data: ABSTRACT

Arthur L. Ingalls

AAPG Bulletin

... is a 2-dimensional filtering equipment in which 2 Fourier transforms are performed sequentially on the in-put transparency. The first transform produces...

1965

Application of Robust Noise Reduction on a Land 3D Seismic Data

Agus Abdullah, Jesse Shaw

Indonesian Petroleum Association

... of a spatial Fourier transform: (1) − Lxc ks r ∞ ~ GBj ( s, f ) = eikr ros ∫ ω + (ros − rd )... j −∞  λ λ  r  ... exp i 2π  n − n  d...

2012

Abstract: Prestack Depth Migration with the Gabor Transform; #90211 (2015)

Yongwang Ma and Gary Margrave

Search and Discovery.com

...-interpolation (GPSPI) wavefield extrapolation using a Gabor, or windowed Fourier, transform to localize the wavefield. The key to an efficient algorithm...

2015

Creating Singularity Order Attribute of Seismic Signals Using Continuous Wavelet Transform (CWT) for Stratigraphic Interpretation Tools

A.M. Ustad, M.S. Jaya, F.J. Herrman

Indonesian Petroleum Association

... (Herrmann and Stark, 1999). Fractional differentiation/integration is defined by Fourier transform (Zähle, 1995), ) dβ β f (t ) α (iω ) f (ω ) β dt...

2007

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

.... [email protected] and Robert J. Ferguson, CREWES, University of Calgary. Summary We use a mathematical model based on the generalized S transform...

2014

Abstracts: Revisiting Homomorphic Wavelet Estimation and Phase Unwrapping; #90173 (2015)

Roberto H. Herrera and Mirko van der Baan

Search and Discovery.com

... out to be phase unwrapping. In this paper we review several existing phase unwrapping techniques and discuss their advantages and inconveniences...

2015

Abstract: Interpolation of Aliased Seismic Data in the Curvelet Domain; #90172 (2014)

Mostafa Naghizadeh, Mauricio D. Sacchi

Search and Discovery.com

... propose a robust interpolation scheme for aliased regularly sampled seismic data that uses the curvelet transform. In a first pass, the curvelet transform...

2014

Improving curvature analyses of deformed horizons using scale-dependent filtering techniques

Stephan Bergbauer, Tapan Mukerji, Peter Hennings

AAPG Bulletin

... (Fourier [spectral] analysis, wavelet transform filtering, singular value decomposition, factorial kriging) on a seismically mapped horizon in the North...

2003

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

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