Results 181 to 190 of about 920,120 (239)
Shallow 3D Reflection Seismics
, 2016 High-resolution 3D reflection seismology for near-surface applications is a noninvasive geophysical approach that uses sound wave reflected from subsurface discontinuities to infer and delineate the discontinuities.
Christian Berndt, Dennis Wilken
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Pitfalls In Shallow Seismic Reflection
7th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1994Substantial progress has occurred during the past 15 years in development of shallow CDP seismic-reflection techniques, but there are occasional interpretation problems with the resulting data. We discuss examples of the pitfalls of the method, along with some procedures to help avoid them.
Don W. Steeples, Richard D. Miller
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Effects of Attenuation on Seismic Reflections
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019Seismic reflections at an interface are often regarded as the variation of the acoustic impedance (product of seismic velocity and density) in a media. In fact, they can also be generated due to the difference in absorption of the seismic energy. In this work, we investigate the impacts of attenuation on seismic reflections based on the diffusive ...
Haixia Zhao +3 more
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Seismic reflectivity attributes
International Meeting for Applied Geoscience & Energy, 2015Summary Seismic structural attributes (e.g., curvatures and similarity), which are usually extracted from post-stack seismic data, have been been widely used to help seismic interpretation. Because seismic data is band limited and contaminated with noise, which results in low resolution of the extracted attribute outputs.
Rui Zhang, Bo Zhang
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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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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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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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Chinese Journal of Geophysics, 2007
AbstractA layer‐by‐layer waveform inversion method is developed to derive the velocities of a multi‐layered model. Firstly, one new concept, medium perturbation‐response, is introduced and the gradient method for waveform inversion is analysed. Essentially, waveform inversion is to extract residual structural information between the real earth and ...
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AbstractA layer‐by‐layer waveform inversion method is developed to derive the velocities of a multi‐layered model. Firstly, one new concept, medium perturbation‐response, is introduced and the gradient method for waveform inversion is analysed. Essentially, waveform inversion is to extract residual structural information between the real earth and ...
openaire +1 more source