Specialized processing of a massive distributed acoustic sensing (DAS) 3D VSP in a producing well

Ali Sayed, Francesca Twynam, Ran Bachrach, Philippe Caprioli, Marcus Holloway, Qingsong Li, Reetam Biswas, Daniel Tebo, Sam Buist

International Meeting for Applied Geoscience and Energy (IMAGE)

... and decimated to 33.4 ft [10 m] in space and 4 ms in time. The spatial decimation was optimized to align the gauge length notch with the spatial Nyquist...

Induced polarization chargeability calibration standards

John E. E. Kingman, Terry J. Ritchie, Peter Rowston*

Petroleum Exploration Society of Australia (PESA)

... as a moving average or FIR digital filter. Filters with multiple gain zeros (notches) at the sampling Nyquist frequency serve best in this regard. For example...

Exploring the Sub-Salt Play in the Frontier Amadeus Basin„Insights from Regional 2D Seismic and Potential Field Data

Emma Hissey, Jennifer Clifford, Tim Debacker

Petroleum Exploration Society of Australia (PESA)

... Increment 1 Sweep frequency Sweep type Sweep length Number of sweeps per VP Front & Back – end tapers Instrumentation Recorder Filters Data Format...

Data Enhancement from a 486-Channel Streamer

Bill Dragoset, Ken Larner

Pacific Section of AAPG

... the Nyquist frequency. Whereas the coherence levels in the two figures are comparable at late times (below about 2.5 sec), the coherence levels for the beam...

Characterization and simulation of transverse noise waves of a multisensor solid streamer

Viktor Smirnov, A. Sourice, J. Ribette, J. Mars, P. Herrmann

International Meeting for Applied Geoscience and Energy (IMAGE)

... spectrum. The angle and frequency dependent reflection of the seismic wavefield at the water-air interface causes destructive interference...

Fracture and Deformation Band Visualization Using Full-Resolution 3D Ground Penetrating Radar (GPR) in Cretaceous Carbonates, #40499 (2010)

Mark Grasmueck, Gregor P. Eberli, Pierpaolo Marchesini, Miquel Coll, Rizky P. Sekti, Juliette Lamarche, Brita Graham Wall, Paul Gillespie

Search and Discovery.com

... is quarter-wavelength as spatial sampling. EQUIPMENT AND ACQUISITION METHOD 1 3 2 A) Centimeter Positioning of the antenna Nyquist criterion...

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...

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...

Advances in Geophysical Techniques for the Detection of Drilling Hazards and Their Application to Seismic Exploration

D. C. N. Pratt, Tong Pow Mun

Southeast Asia Petroleum Exploration Society (SEAPEX)

... equations. “Geophysics”, V 50, pp 609–614. 5. Taner, M.T., and Sheriff, R.E., 1977, Application of Amplitude, Frequency and Other Attributes...

The contribution of recent developments in signal processing technology and geological constraints to the reimaging of narrow-azimuth streamer data in the north-eastern Gulf of Mexico

Hongyan Li, Jarred Hostetler, Nadxieli De La Rosa Perez, Hugo Enrique Munoz Cuenca, Zhao Ge, Wilson Ibanez, Courtney Steichen, Ruoyu Gu, Jarrod Hutson, Michiru Tomida

International Meeting for Applied Geoscience and Energy (IMAGE)

..., but to Nyquist frequency at a 4-ms sample rate. A previous raytracing study (Espinoza et. al, 2017) indicated that the maximum aperture to model salt-related...

Unraveling the Origin of Carbonate Platform Cyclothems in the Upper Triassic Durrenstein Formation (Dolomites, Italy)

Nereo Preto, Linda A. Hinnov

Journal of Sedimentary Research (SEPM)

... requires an additional degree of interpretation, which reduces the objectivity of the analysis. The highest resolvable (Nyquist) frequency for a cyclothem...

Abstract: Spontaneous Potential as a Method for Mapping Degrading Organic Contaminants: An Explanation of its Variable Efficacy; #90172 (2014)

Sarah Forté, Laurence R. Bentley

Search and Discovery.com

.... Examples of anomalies include: −600 mV over a jet fuel plume (Shi, 1998), −80 mV over tomato canning waste (Nyquist and Corry, 2002) and −400 mV over...

Comparison of Seismic Reconvolution and Gabor Deconvolution in Improving Seismic Images to Detect Local Fluid Trapping

Madaniya Oktariena, Wahyu Triyoso

Indonesian Petroleum Association

... with frequency range from 0 to its Nyquist. Figure 3B: Comparison of initial Post-Stack Seismic data, enhanced seismic by Seismic Reconvolution...

Integrated Quantitative Stratigraphy of the Cenomanian-Turonian Bridge Creek Limestone Member Using Evolutive Harmonic Analysis and Stratigraphic Modeling

Stephen R. Meyers , Bradley B. Sageman , Linda A. Hinnov

Journal of Sedimentary Research (SEPM)

... the Nyquist frequency (maximum frequency resolvable) far above that of most End_Page 631------------------------ FIG. 3. Simple models...

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...

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...

Preservation of Structural Information Across Prospect Portfolios

Search and Discovery.com

Velocity estimation via model order reduction

Alexander V. Mamonov, Liliana Borcea, Josselin Garnier, Jrn Zimmerling

International Meeting for Applied Geoscience and Energy (IMAGE)

... according to the Nyquist sampling rate for the essential frequency of f (t) (the largest frequency in the interval outside of which f (ω) is small). Using...

Analysis of Fracture Injection Tests using Signal Processing Approach

I. Eltaleb, A. Rezaei, F. Siddiqui, M. M. Awad, M. Mansi, B. Dindoruk, M. Y. Soliman

Unconventional Resources Technology Conference (URTEC)

... Engineers. Cramer, H., & Grenader, U. (1959). The Nyquist frequency is that frequency whose period is two sampling intervals. In Probability...

Cyclostratigraphic and Ichnofacies Analysis of the Upper Albian Salmon Peak Formation, Maverick

Laura C. Zahm , Charles Kerans , James L. Wilson

GCAGS Transactions

...) results in a nyquist frequency of 79 meters (258 feet). The window size was designated Figure 3. Upper Albian paleogeography of Texas and Mexico showing...

Improved Understanding and Interpretability Beneath the Complex Accretionary Section in West Timor, Indonesia, Via Marine Broadband Seismic and Beam Depth Migration

Mazin Farouki, Felice D'Alterio, Erika Gentile

Indonesian Petroleum Association

... the receiver ghost and associated ghost frequency notches via wavefield separation of the recorded data into its component up-going and down-going wavefields...

Spectral Analysis of the Middle Triassic Latemar Limestone

Linda A. Hinnov, Robert K. Goldhammer

Journal of Sedimentary Research (SEPM)

..., undersampled or imperfectly sampled processes tend to contain amplified components at the Nyquist frequency, with which this line coincides. The estimated...

Long Climatic Time Series from Sediment Physical Property Measurements

Timothy D. Herbert, Larry A. Mayer

Journal of Sedimentary Research (SEPM)

... interval corresponding to the Nyquist frequency in a manner not known a priori. To evaluate the evolutionary aspect of climate, however, densely sampled data...

Filtering of Depositional Events and the Completeness of Sedimentary Sequences

Kevin D. Crowley

Journal of Sedimentary Research (SEPM)

... successive reversals for the section is known to be 40,000 years from sea-floor data, it is necessary to sample the section at a Nyquist frequency...

Detection of Astronomical Cycles in the Stratigraphic Record by Frequency Modulation (Fm) Analysis

Linda A. Hinnov , Jeffrey Park

Journal of Sedimentary Research (SEPM)

... evolving cross-phase out to the Nyquist frequency. This, plus low coherence in this part of the spectrum, is indicative of low to no signal...