Results 141 to 150 of about 203 (193)
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Seismic Reflection Principles—Basics
2016Seismic reflection events are caused by the impedance contrasts at layer interfaces having a minimum width (Fresnel Zone). Seismic studies to represent reliably the subsurface geology, require quality data, which depend on signal-to-noise ratio and resolution, the latter being the ability to image thin geologic features separately.
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Seismic reflection and refraction
1990Abstract The ice cover of the Arctic Ocean restricts research vessels, limiting the number of miles of seismic reflection and refraction lines in the area. Figures 1 and 2 show the distribution of the lines, andTables 1 and 2 provide references keyed to those figures.
H. R. Jackson +3 more
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2016
A seismic field is created as a result of a sudden mechanical impact that occurs at a point inside a medium. The created packet of energy (called the seismic energy pulse) spreads out from the source zone in all directions.
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A seismic field is created as a result of a sudden mechanical impact that occurs at a point inside a medium. The created packet of energy (called the seismic energy pulse) spreads out from the source zone in all directions.
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Journal of Geophysical Research, 1961
The theory originally due to Cagniard is recast in a form that makes the approximate numerical calculation of the shape of the reflected pulse simple. A new set of potentials is introduced from which the displacement components can be calculated by differentiations that are easier to perform than those with the usual scalar and vector potentials.
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The theory originally due to Cagniard is recast in a form that makes the approximate numerical calculation of the shape of the reflected pulse simple. A new set of potentials is introduced from which the displacement components can be calculated by differentiations that are easier to perform than those with the usual scalar and vector potentials.
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2018
A systematic seismic investigation of Osaka Bay is presented in this chapter. Multichannel reflection records from 19 lines totaling 456 km in length were acquired by the Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST); the Hydrographic and Oceanographic Department of the Japan Coast Guard (JCG); and ...
Yasuto Itoh, Keiji Takemura
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A systematic seismic investigation of Osaka Bay is presented in this chapter. Multichannel reflection records from 19 lines totaling 456 km in length were acquired by the Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST); the Hydrographic and Oceanographic Department of the Japan Coast Guard (JCG); and ...
Yasuto Itoh, Keiji Takemura
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On the distribution of seismic reflection coefficients and seismic amplitudes
Geophysics, 1995Abstract Reflection coefficient sequences from 14 wells in Australia have a statistical character consistent with a non-Gaussian scaling noise model based on the Levy-stable family of probability distributions. Experimental histograms of reflection coefficients are accurately approximated by symmetric Levy-stable probability density ...
Scott Painter +2 more
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A Unified approach to seismic reflection imaging
56th EAEG Meeting, 1994Given a seismic record of either displacement or pressure seismograms and assuming a laterally inhomogeneous, isotropic three-dimensional (3-D) macro-velocity model, we provide a complete theory of seismic reflection imaging. It consists of (a) a Kirchhoff-type weighted diffraction stack to transform (migrate) the seismic data from the record space (i ...
M. Tygel, P. Hubral, J. Schleicher
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Seismic Detection Of Viscous Contaminent Using Shallow Seismic Reflection
11th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1998We conducted a high resolution very shallow seismic experiment in order to image the effect of viscous fluids on signal attenuation in surface acquired seismic data. We mixed 20 liters of honey with 200 liters of beach sand. Then we buried the mixture in a pit at depth of 1 m in the center of the seismic line. We collected two CDP seismic .
Ran Bachrach, Amos Nur, James Rickett
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An introduction to seismic reflection data: acquisition, processing and interpretation
2020Knowledge of the subsurface can be ascertained from outcrop extrapolation, drilling, mining and geophysical measurements. Geophysical techniques help us to fully understand the evolution of sedimentary basins by creating images of the subsurface. This is especially important in basins where either the trend of the stratigraphy or the lack of outcrop ...
Cox, David R. +2 more
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Journal of Structural Geology, 2006
Seismic reflection characteristics of several common folded structures have been investigated by forward synthetic modeling in order to interpret correctly the seismic data from ancient and modern orogenic belts. The studied folds include single-order open folds, close folds and asymmetric inclined folds as well as multi-order folds.
Shaocheng Ji, Changxing Long
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Seismic reflection characteristics of several common folded structures have been investigated by forward synthetic modeling in order to interpret correctly the seismic data from ancient and modern orogenic belts. The studied folds include single-order open folds, close folds and asymmetric inclined folds as well as multi-order folds.
Shaocheng Ji, Changxing Long
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