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The AAPG/Datapages Combined Publications Database
Showing 154 Results. Searched 200,357 documents.
Abstracts: Noise Examples from Two Microseismic Datasets; #90173 (2015)
Andy St-Onge and David Eaton
Search and Discovery.com
... spectrum of the noise ranges from D.C. to about 800 Hz., at which point it drops to the 1333 Hz. Nyquist frequency. It can be shown that most...
2015
Acquisition geometry design based on full-wavefield migration
Billy A. Revelo Obando, Gerrit Blacquire
International Meeting for Applied Geoscience and Energy (IMAGE)
... for an adequate signal-to-noise ratio (SNR). The source and receiver sampling of the ultimate acquisition geometry would satisfy the Nyquist-Shannon criterion...
2022
Abstract: Reflectivity Color Correction in Gabor Deconvolution; #90211 (2015)
Carlos Montana and Gary Margrave
Search and Discovery.com
... are noise in the seismic data, inaccuracies in the sonic log recording process, and the difference between the seismic Nyquist frequency...
2015
Abstract: Black Box Recording of Passive Seismicity: Pitfalls of not Understanding your Acquisition Instrumentation and its Limitations; #90187 (2014)
Ted Urbancic and Andreas Wuestefeld
Search and Discovery.com
... recording system yields an undistorted picture of ground motion from 15Hz to the Nyquist frequency as imposed by the digitizer or the high-frequency...
2014
Abstracts: Revisiting Homomorphic Wavelet Estimation and Phase Unwrapping; #90173 (2015)
Roberto H. Herrera and Mirko van der Baan
Search and Discovery.com
... phase due to the time shifting, except near the Nyquist frequency due to lack of signal. Finally we tested the performance of these algorithms...
2015
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
Diagnostic Applications of Borehole Hydraulic Signal Processing
Connor J. Clark, Jennifer L. Miskimins, Dana L. Gallegos
Unconventional Resources Technology Conference (URTEC)
.... The highest mathematically resolvable frequency occurs at half of the sampling rate, called the Nyquist or folding frequency. The Nyquist frequency...
2018
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
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
Seismic Interpretation and Characterization of Igneous Rocks in Jan Mayen Microcontinent, Norwegian-Greenland Sea, #51369 (2017).
K.O. Omosanya, D. Harishidayat, S.E. Johansen
Search and Discovery.com
... theoretical frequency of 250 Hz (Nyquist frequency). On the other hand, the older vintages (JM 1979 and JM-1988) have vertical sampling rate of 4 ms (Nyquist...
2017
Multiple Aliasing Problems in Marine Data
P. Chia, C. O. Kuek, P. Ward, K. S. Lee
Geological Society of Malaysia (GSM)
... is to be expected, the aliased noise is mapped exactly on one half of the K Nyquist for the Paper presented at GSM Petroleum Geology Seminar 1991 Bulletin...
1992
Enhancing Seismic Interpretation Using Crosswell Seismic: Case Study From Indonesia
Tri Handayani, Zeppy Irwanzah, M. Taslim, Sanjeev Dogra, Ajay Nalonnil, Bruce Marion, Pedro Carrillo Reyes
Indonesian Petroleum Association
... attenuation and for longer distances between wells. Operating at a frequency range of 30Hz–800Hz, this source produces about 20 dB more amplitude than...
2011
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
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: Time-varying Wavelet Estimation and Deconvolution; #90171 (2013)
Mirko van der Baan
Search and Discovery.com
... for enhanced robustness, while (3) ensuring that the amplitude at the Nyquist frequency remains zero. This procedure leads to a symmetric, zero-phase wavelet...
2013
Abstract: Compressive Sensing Challenged; #91204 (2023)
Jan de Bruin
Search and Discovery.com
... in the quality of the final seismic images. It is sometimes said that we have always under-sampled seismic wavefields because applying the Nyquist rule...
2023
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
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
Predicting and Detecting Carbonate Cemented Zones Within Latrobe Group Reservoirs of the Gippsland Basin
Mark Bunch
Petroleum Exploration Society of Australia (PESA)
.... Equivalent beats for the full-band seismogram have a period of 8 ms – at the Nyquist limit – but they are drowned out by modal frequency response, which...
2018
Australian Insights into Streamer Technology Innovations
Andrew Long
Petroleum Exploration Society of Australia (PESA)
... impedance inversion are absent, operations are methodology is less sensitive to streamer depth way up to the Nyquist frequency. Thu s, the exposed...
2009
Magnetic Spectrum of the San Kampaeng Geothermal Area, Northern Thailand
Somsri Sertsrivanit, Charn Tantisukrit, Surachai Praserdvigai
Geological Society of Malaysia (GSM)
... to the highest frequency or nyquist frequency at 0.005 cycle/metre. In Figure 3, the high amplitude energy spectrum is TO TAL Fig. 4. M A G N E T IC F...
1986
Effect of near offset seismic data in shallow subsurface modeling using full-waveform inversion
Md Iftekhar Alam, Salman Abbasi
International Meeting for Applied Geoscience and Energy (IMAGE)
... data volume on the resolution for FWI models is observed. Nyquist frequency and Fresnel zone are often discussed when it comes to the data resolution...
2024
Abstract: A Compressive Sensing Seismic Data Reconstruction Approach Based on Accelerated Iterative Threshold; #91204 (2023)
Lieqian Dong, Mugang Zhang, Xueyong An, Datong Zhou, Yunlei WangDong
Search and Discovery.com
... Lieqian Dong, Mugang Zhang, Xueyong An, Datong Zhou, Yunlei Wang Dong BGP, CNPC Abstract Compressive sensing (CS) breaks through the limitation of Nyquist...
2023
Pre-drill Reservoir Evaluation Using Passive Seismic Imaging
Charles Sicking, Jan Vermilye, Ashley Yaner
Unconventional Resources Technology Conference (URTEC)
... and cannot be easily modeled. These noises are suppressed using the trace filtering workflow that includes cepstral filtering and low cut frequency...
2016