Applications of Shallow High-Resolution Seismic Reflection to Environmental Problems

Richard D. Miller, William E. Doll, Carlene Merey, William E. Black

Environmental Geosciences (DEG)

... from 40 to 150 msec possess high signal-to-noise ratios and suggest repetitive layering with subtle folds and changes in bedding angles. The data...

Resolving DAS versus geophone discrepancies using the DAS transform: A comparative study from the CaMI CCS field research station, Alberta

Ali Sayed, Robert R. Stewart, Marie Macquet, Don Lawton

International Meeting for Applied Geoscience and Energy (IMAGE)

...he 15 to 100 Hz bandwidth. Higher frequencies on the DAS data are filtered down due to the gauge length effect (equation 1). The DAS spectral ratio ...

Mg zonation and heterogeneity in low-Mg calcite microcrystals of a depositional chalk

Chanse J. Rinderknecht, Franek J. Hasiuk, Stephan C. Oborny

Journal of Sedimentary Research (SEPM)

... the signal-to-noise ratio. To obtain chemical compositions along the otherwise qualitative line scans, spot analyses (spot size ≈ 5 nm) were performed...

Quantifying Detection Limits and Uncertainty in X-ray Diffraction Mineralogical Assessments of Biogenic Carbonates

Karen L. Vyverberg, John M. Jaeger, Andrea Dutton

Journal of Sedimentary Research (SEPM)

.... In the signal domain (i.e., PAR), the decision limit (critical level) (YC) is the signal above which we can state that it is not caused solely by noise...

An Interpreter's Guide to Improvements in Depth Imaging Through Model-Based Velocity Estimation and Refinement

Andy Furniss

Indonesian Petroleum Association

... assumption in areas of poor signal to noise or at greater depths where moveout discrepancy is more difficult. Figure 5. Stacking velocity inversion uses...

An Interpreter's Guide to Improvements in Depth Imaging through Model-Based Velocity Estimation and Refinement

Andy Furniss

Petroleum Exploration Society of Australia (PESA)

... in areas of poor signal to noise or at greater depths where moveout discrepancy is more difficult. Both coherency inversion and stacking velocity...

Early Diagenetic Calcites and Associated Bitumens in the "Nordegg Member": Implications for Jurassic Paleogeography of the Western Canada Sedimentary Basin

C.L. Riediger,, M. Coniglio

CSPG Bulletin

...). The lower signal-to-noise ratio of the fracture-fill bitumen (Figs. 6, 7), relative to the other two bitumen samples, indicates a lower concentration...

ABSTRACT: Quantifying Uncertainty in Geological Structures, by Alan D. Gibbs; #90906(2001)

Search and Discovery.com

Bering Sea Velocity-amplitude Anomalies: Exploring the Distribution of Natural Gas and Gas-hydrate Indicators

Ginger A. Barth, David W. Scholl, and Jonathan R. Childs

AAPG Special Volumes

...-channel streamer; for our study, the two channels are summed to improve the signal-to-noise ratio. Data were recorded at a 4-ms sampling interval...

Comprehensive pressure core analysis for hydrate-bearing sediments from Gulf of Mexico Green Canyon Block 955, including assessments of geomechanical viscous behavior and nuclear magnetic resonance permeability

Jun Yoneda, Yusuke Jin, Michihiro Muraoka, Motoi Oshima, Kiyofumi Suzuki, William F. Waite, and Peter B. Flemings

AAPG Bulletin

... µs for the CPMG parameters. By averaging more than 16 signals, signal-to-noise ratios of approximately 10 and 130 were obtained before and after hydrate...

Combined Inversion Recovery and CPMG NMR Interpretation Method for More Accurate Quantification of Liquid Saturations in Organic Rich Mudstones

Robert Krumm, James Howard

Unconventional Resources Technology Conference (URTEC)

... constant diminishes and the distributions lose character, too few and NMR signal may lose resolution in time-space. Figure 2 shows the effect of the quantity...

Organic Facies Variation in Lacustrine Source Rocks in the Southern Malay Basin

Abdul Jalil Muhamad, Awang Sapawi Awang Jamil

Geological Society of Malaysia (GSM)

... higher signal-to-noise ratio, GCMSMS traces also eliminate the possibility of co-elution from two or more compounds. GCMSMS traces of hopanes...

Optimised 3D Land Geophysical Survey Design - A Case Study

P. van Baaren

Papua New Guinea (PNG) Petroleum Convention Proceedings

... poorer signal to noise ratios, the fold taper areas will have less than optimum characteristics for the imaging process. This will increase...

Optimization of Infill Well Development Using a Novel Far-Field Diversion Technique in the Eagle Ford Shale

Yuri Rodionov, Cyrille Defeu, Kush Gakhar, Kevin Mullen, J T. Mayo, Dan Shan, Dmitri Usoltsev, E.A. Ejofodomi

Unconventional Resources Technology Conference (URTEC)

.... This technique, coupled with an acquisition system that filters the data to improve the signal-to-noise ratio, enables a more detailed interpretation...

Clari-Fi’: Broadband Data from Conventional Streamer Acquisition

Nic Woodburn, Tom Travis, Hassan Masoomzadeh, TGS

GEO ExPro Magazine

... spectrum and not the noise. In order to maximise the whitening of the signal spectrum, a multi-dimensional noise attenuation approach is used. Several...

Abstract: A New Method of Multiple Attenuation: Multiple Identification and Subtraction (II); #90171 (2013)

Wen-Jing Wu

Search and Discovery.com

...(a) is a CMP gather of a real data set. Obviously, the signal is damaged by the noise in near offset traces. Multiple-attenuation by Radon transformation...

Abstract: Pseudo ARMA FX Deconvolution for Seismic Data Noise Reduction; #90174 (2014)

Mike Galbraith and Zhengsheng Yao

Search and Discovery.com

... , where S is pure signal and W is additive white noise, then (Sacchi and Kuehl, 2000) (2) where g is the prediction error filter with g(0)=1, and g(1:p...

Abstracts: Recovery of Low Frequency Data from 10Hz Geophones; #90173 (2015)

Malcolm B. Bertram, Gary F. Margrave

Search and Discovery.com

... to take the signal-to-noise decrease due to offset into consideration. Beware that many acquisition systems apply a 3Hz low cut filter by default...

The Subandean Foothills Basins, a Regional Study.

Larry Garmezy, Hanspeter Mohler, Keith James, Harry Doust

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... velocity fields and steep dips. These issues are difficult to resolve because of their coupled nature. The root cause of poor imaging and signal to noise...

Quantifying the Impacts of Competitive Water Adsorption of Kerogen and Clay Minerals on Wettability of Organic-Rich Mudrocks

Archana Jagadisan, Zoya Heidari

Unconventional Resources Technology Conference (URTEC)

... Signal-to-Noise ratio Routine Core Analysis Total Organic Carbon Content Water Adsorption Capacity URTeC 572 14 Nomenclature Tmax T2 Temperature...

Deriving Elastic and Petrophysical Properties From Small Sample Volumes Using Digital Rock Analysis

Vegar Ravlo, Pål-Eric Øren, Cathrine Ringstad

Unconventional Resources Technology Conference (URTEC)

... of FIB1 in Figure 5, and the enhanced signal-to-noise ratio significantly improves the segmentation of the various phases into a labeled 3D volume...

Identification of magnetic enhancement at hydrocarbon-fluid contacts

Sijibomioluwa A. Badejo, Adrian R. Muxworthy, Alastair Fraser, Graham R. Stevenson, Xiang Zhao, and Michael Jackson

AAPG Bulletin

... and show no evidence for any magnetic minerals. In comparison, the signal-to-noise ratio for the oil samples (Figure 4B, C) is much higher (i.e....

Fully 3-D Simulation of Diagnostic Fracture Injection Tests with Application in Depleted Reservoirs

Shuang Zheng, Ripudaman Manchanda, HanYi Wang, Mukul M. Sharma

Unconventional Resources Technology Conference (URTEC)

... the effect of depletion, fracture asymmetry and production duration on the DFIT response. This work for the first time presents the expected DFIT...

Bitumen geochemistry and producibility in the Upper Cretaceous Niobrara Formation shale oil play

Yuanjia Han, Brian Horsfield, Nicolaj Mahlstedt, and Heather LaReau

AAPG Bulletin

... Analysis 4.0 SP5 (Bruker Daltonik GmbH), elemental formulas were assigned to peaks with a signal-to-noise ratio greater than 9, allowing 0 – 100 C, 0 – 200 H...

Telluric Currents and Their Use in Petroleum Exploration

K. Vozoff , R. M. Ellis , M. D. Burke

AAPG Bulletin

... to determine the ratio of Ex at the mobile station to Ex at the base at a number of frequencies (in order to take advantage of the skin effect). The same must...