Rejuvenation of a Mature Field Through Application of a Unique Frequency Enhancement Technology, by Marcus L. Countiss, #40076, (2003)

Search and Discovery.com

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...

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...

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...

Warming is a Benefit to Humans and the Biosphere

John Dale Dunn

GCAGS Transactions

.... Bartzokas, A., P. Kassomenos, M. Petrakis, and C. Celessides, 2004, The effect of meteorological and pollution parameters on the frequency of hospital...

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...

Quantitative Analysis of a Cyclic Peritidal Carbonate Sequence, the Middle and Upper Devonian Lost Burro Formation, Death Valley, California--A Possible Record of Milankovitch Climatic Cycles

Wan Yang , Fraka Harmsen , Michelle A. Kominz

Journal of Sedimentary Research (SEPM)

... as the peaks on Table 3. Nyquist frequency = 24. Four windows were used in the spectral computation. See text for detailed discussions. FIG. 14. Spectra...

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...

Interpretation of Seismic Reflection, Gravity, and Magnetic Data Across Middle Proterozoic Mid-Continent Rift System, Northwestern Wisconsin, Eastern Minnesota, and Central Iowa

Val W. Chandler , Peter L. McSwiggen , G. B. Morey , William J. Hinze , R. R. Anderson

AAPG Bulletin

.... 11, p. 1-4. Nyquist, J. E., and H. F. Wang, 1988, Flexural modeling of the Midcontinent rift: Journal of Geophysical Research, v. 93, p. 8852-8868...

Land 3D Acquisition Techniques Related to S.E. Asian Situation

Walter Ritchie

Indonesian Petroleum Association

... maximum signal frequency (i.e. half-wavelength sampling or Nyquist point) where V = seismic velocity F = max frequency θ = dip angle Method 1...

Fracture and Stratigraphy Characterization Using Full-Resolution 3D Ground Penetrating Radar (GPR) in Cretaceous Carbonates

Rizky P. Sekti, Gregor P. Eberli, Mark Grasmueck, Brita Graham-Wall, Jeffrey Lukasik

Indonesian Petroleum Association

... in all direction). Consequently, positioning precision needs to be better than an eighth of a wavelength (Nyquist, 1928) for correct grid assignment...

Quality Data at a Reduced Price: Innovative Approaches in 3-D Acquisition and Processing

Mars E. Semaan, Michel F. Bee, Maryanto, Gerard Dufourd, Eddy A. Sentani

Indonesian Petroleum Association

... was lower than 200 Hz in both cases. Knowing that the Nyquist frequency for 2 ms sampling interval is 250 Hz, a sample interval of 2 ms was chosen...

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...

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...

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...

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...

Deep-Water Depositional Facies and Reservoir Quality Evaluation Based on Fourier Analysis of Gamma-Ray Logs

Fillon, Richard H., Lawless, Paul N.

GCAGS Transactions

..." (frequency of occurrence) data for 1024 individual bed thicknesses (wavelengths). The bed thickness increments resolved in the spectra are not constant...

Comparison of Bed Form Variance Spectra Within a Meander Bend During Flood and Average Discharge

Raymond A. Levey, Bjorn Kjerfve, Rufus T. Getzen

Journal of Sedimentary Research (SEPM)

...: Math Comput., v. 19, p. 297-301. DALYRYMPLE, TATE, 1960, Flood frequency analysis: U.S. Geol. Survey Water-Supply Paper 1543-A. EDGE, B. L., AND LIU...

Scanning Electron Micrographs of Quartz Sand Grains from Cold Environments Examined Using Fourier Shape Analysis

Julian A. Dowdeswell

Journal of Sedimentary Research (SEPM)

... for Fourier shape analysis, and according to Nyquist's rule at least twice as many points must be known as the number of harmonics extracted. Each grain...

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...

3-D Seismic Fault-Plane Images from Offshore Myanmar, Gulf of Thailand, and Lake Maracaibo: Insight into Regional Stresses and Hydrocarbon Migration Pathways; #40892 (2012)

John D. Pigott and Non Prapasanobon

Search and Discovery.com

... and some lineations may be artifacts resulting from the gridding interpolation process (those smaller than the spatial Nyquist are ignored) Amplitude...

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...

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...

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...

Morphometry of blue land crab (Cardisoma guanhumi) burrows: ichnological context and paleoenvironmental implications

Christopher A. Sparacio, Ilya V. Buynevich, H. Allen Curran, Karen Kopcznsk

PALAIOS

..., Developments in Sedimentology 64: Elsevier, Amsterdam, p. 245–249. KOPCZNSKI, K.A., BUYNEVICH, I.V., CURRAN, H.A., CARIS, J., AND NYQUIST, J.E....