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The AAPG/Datapages Combined Publications Database
Showing 154 Results. Searched 200,691 documents.
Comparison of seismic resolution enhancement techniques: Spectral extrapolation vs spectral balancing
Charles I. Puryear
International Meeting for Applied Geoscience and Energy (IMAGE)
.... Figure 1: Spectral balancing workflow Methods The seismic data were first resampled to 1 ms in order to ensure that the Nyquist frequency...
2023
Abstract: Chronologic Surface: A New Method for Dating Martian Landforms; #90172 (2014)
Radu Dan Capitan, Gordon R. Osinski, Marco Van de Wie
Search and Discovery.com
...., Golombek M.P., Hartmann W.K., Hauber E., Jaumann R., P. Masson P., Neukum G., Nyquist L.E. and Carr M.H. 2001. Geological processes and Evolution...
2014
Abstract: Interpolation of Aliased Seismic Data in the Curvelet Domain; #90172 (2014)
Mostafa Naghizadeh, Mauricio D. Sacchi
Search and Discovery.com
... losses, the data should be sampled according to the Nyquist criterion. When this criterion is not honored, reconstruction can be used to recover...
2014
Abstract: Variable-factor S-transform for Time-frequency Decomposition, Deconvolution, and Noise Attenuation; #90172 (2014)
Todor I. Todorov, Gary F. Margrave
Search and Discovery.com
... at Nyquist. We can see good time-frequency resolution for all frequency components. Variable-factor S-transform deconvolution Wiener deconvolution...
2014
Abstract: Borehole Vibration Response to Hydraulic Fracture Pressure; #90187 (2014)
Andy St-Onge, David W. Eaton, and Adam Pidlisecky
Search and Discovery.com
... survey. The data were sampled at time intervals as low as 0.25 msec (equivalent to a Nyquist frequency of 2000 Hz.). Frac-related microseismic...
2014
Abstract: How to Attenuate Diffracted Noise: (DSCAN) A New Methodology; #90211 (2015)
Ali Karagul, Todd Mojesky, XinXiang Li, and Necati Gulunay
Search and Discovery.com
... for the 2D shallow marine high resolution survey (Nyquist frequency=500Hz). The diffractors on this line were mostly broadside diffractors...
2015
Abstract: Interpolation by Angular Deconvolved prior MWNI (AdMWNI); #90224 (2015)
Mark Ng and Dan Negut
Search and Discovery.com
... and Negut (2013) showed that the dip scan can be easily done for all dips in the ω- kx frequency-wavenumber domain. It is achieved by calculating an angular...
2015
Enhancing Vertical Seismic Resolution with Seismic Frequency Restoration and Attributes; #42156 (2017)
Luis Vernengo, Eduardo Trinchero, Maximillian Garcia Torrejon, Ignacio Rovira
Search and Discovery.com
... has a two-millisecond sample interval, it is subsampled to 0.5 milliseconds using the Nyquist frequency as a limit. For the next step, the temporal...
2017
Multichannel compressive sensing for seismic data reconstruction using joint sparsity
Iga Pawelec, Michael Wakin, Paul Sava
International Meeting for Applied Geoscience and Energy (IMAGE)
... acquisition relies on recording the particle motion on a regular grid, with spacing between stations dictated by the maximum frequency of the signal...
2022
Reconstruction of the Subsurface Reflected Wavefield on a Dense Grid from Multisensor Streamer Data
M. Vassallo, K. Eggenberger, D.J. van Manen, P. Watterson, A. Raskopin, A. Özbek
Indonesian Petroleum Association
... are assumed to be linear, and consequently, low-frequency information is extrapolated to high frequencies where aliasing is present. This is the approach...
2013
Field Technique Design for Seismic Reflection Exploration
L. R. Denham
Dallas Geological Society
... at the Nyquist frequency. For example, the standard alias filter in a DFS V with converter dynamic range of 80 dB attenuates at least 70 dB at the Nyquist...
1982
Extending the Resolution of Seismic Reflection Exploration
L. R. Denham
Pacific Section of AAPG
... approach to alias filters is to attenuate to a level comparable with the converter noise at the Nyquist frequency. For example, the standard alias filter...
1980
Identification of Fracture Zone in Field A Using Maximum Entropy Method
Aditya T. Pratama, Leonard J.I. Lisapaly
Indonesian Petroleum Association
... estimator. In this study, we use Matlab© Code based on Marple Equation. AVAILABLE DATA (1.5) where fN is the Nyquist frequency of the studied series, PME...
2005
The digital revolution in mudlogging: An innovative workflow for advanced analysis and classification of drill cuttings using computer vision and machine-learning
Simone Di Santo, Tetsushi Yamada, Karim Bondabou, Mahdi Ammar
International Meeting for Applied Geoscience and Energy (IMAGE)
..., that lead to have the exact pixel size. The resolution analysis led to 35 lines per mm which give the smaller measurable object, as per Shannon/Nyquist...
2022
Codes and Ciphers Simultaneous: Source Separation: PART II
Johan O. A. Robertsson, Dirk-Jan Van Manen, Lasse Amundsen, Martin Landrø
GEO ExPro Magazine
... of ‘popcorn’ fm is the maximum frequency; ks the spatial sampling frequency; and kn = ks /2 is the spatial source sequences to encode multiple airgun Nyquist...
2016
Efficient acquisition and imaging of high-resolution seismic data with the continuous wavefields method
Tilman Klver, Torben Hy
International Meeting for Applied Geoscience and Energy (IMAGE)
... in Figure 7. These f-k spectra demonstrate that spatial bandwidth recovered from the data can be extended beyond the Nyquist wavenumbers for the natural...
2022
An acoustic wave equation with the gradients of velocity and density
Jianyong Bai, Orhan Yilmaz
International Meeting for Applied Geoscience and Energy (IMAGE)
... ), where Vmin is the minimum velocity, and n is the number of points needed to cover the Nyquist frequency ( fN ) for nondispersive propagation. In order...
2023
Active sampling design for seismic data based on dynamic matching distance
Yingjie Xu, Siwei Yu
International Meeting for Applied Geoscience and Energy (IMAGE)
... methods adhering to the Nyquist-Shannon sampling theorem, necessitate high sampling frequencies, which significantly contribute to the sampling theorem...
2024
3D ultra high resolution seismic processing A case study from offshore USA
Bertrand Caselitz, Luca Limonta, Julien Oukili, Jonas Tegnander, Vicky Catterall
International Meeting for Applied Geoscience and Energy (IMAGE)
... the radial distance to the first offset class. The temporal sampling interval of 0.125 milliseconds corresponds to a Nyquist frequency of 4 kHz...
2024
Hybrid 3D Marine Towed-Streamers and Ocean-Bottom Nodes Survey - Challenges and Solutions for Seismic Data Processing and Imaging
Wai Leng Cheah, Wong Li Ming Joyce, Evonne Hooi Rong Yu, Artem Sazykin, Gavin Menzel-Jones
Indonesian Petroleum Association
... dealiasing, we used MPFI. The interpolation was guided by prior data, which, in this case, were the low-frequency and low-wave-number component...
2019
True-Azimuth 3D Surface-Related Multiple Elimination
Roald van Borselen, Rob Hegge, Peter Aaron, Simon Barnes, Andrew Long
Petroleum Exploration Society of Australia (PESA)
.... In particular out in t he frequency domain w ithin an apert ure receiver pairs have a non-zero cross line offset for complex 3D geological areas, the zone...
2009
Broad bandwidths reveal double the expected sediment depth in the Northern Carnarvon Basin
Jo Firth, Mark Stanley
Petroleum Exploration Society of Australia (PESA)
... in elastic properties between the layers. This can significantly affect the seismic image quality by attenuating the high-frequency component and greatly...
2016
Seismic Attributes for Reservoir Property Prediction A Review (Geophysics Poster 16)
Muhammad Sajid, Zuhar Zahir Bin Tuan Harith
Geological Society of Malaysia (GSM)
... zero- to dominant-frequency range is responsive to the presence of fluid whereas the energy loss from dominant to Nyquist-frequency range...
2011
Basic Seismic Processing: Part 7. Geophysical Methods
Peter M. Duncan
AAPG Special Volumes
... tastes of the interpreter. Such things as frequency content, gain, trace spacing, and type of display are all up for grabs (see the chapter...
1992
ABSTRACT: Rejuvenation of a Mature Field Through Application of a Unique Frequency Enhancement Technology; #90007 (2002)
Marcus L. Countiss
Search and Discovery.com
... possible to regain frequencies up to Nyquist frequency (half the sampling frequency) on properly recorded and processed data. 2 AAPG Search...
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