Abstract
Data processing techniques have been investigated for clarifying structures and physical properties of geothermal reservoirs in the deep underground by seismic exploration using multiple wells. They include the initial motion time-distance tomography, amplitude tomography, diffracted wave tomography, and structure imaging using reflected wave or scattered wave. When applying these data processing methods to observed records, weak and minor signals essentially required are canceled due to averaging the analytical fields. In this study, influence of inhomogeneous media on the wavefield was evaluated. Data were analyzed considering frequency by using wavelet transform by which time-frequency can be easily analyzed. From the time-frequency analysis using wavelet transform, it was illustrated that high frequency scattered waves, generated by scatterer like cracks or by irregularity on the reflection surface, arrive behind direct P-wave and direct S-wave. 5 refs., 8 figs.
Matsushima, J;
Rokugawa, S;
Kato, Y;
[1]
Yokota, T;
Miyazaki, T;
[2]
Ichie, Y
[3]
- The University of Tokyo, Tokyo (Japan). Faculty of Engineering
- Geological Survey of Japan, Tsukuba (Japan)
- The University of Tokyo, Tokyo (Japan)
Citation Formats
Matsushima, J, Rokugawa, S, Kato, Y, Yokota, T, Miyazaki, T, and Ichie, Y.
Wavefield analysis in inhomogeneous media by wavelet transform; Wavelet henkan ni yoru fukinshitsu baitai no hadoba kaiseki.
Japan: N. p.,
1996.
Web.
Matsushima, J, Rokugawa, S, Kato, Y, Yokota, T, Miyazaki, T, & Ichie, Y.
Wavefield analysis in inhomogeneous media by wavelet transform; Wavelet henkan ni yoru fukinshitsu baitai no hadoba kaiseki.
Japan.
Matsushima, J, Rokugawa, S, Kato, Y, Yokota, T, Miyazaki, T, and Ichie, Y.
1996.
"Wavefield analysis in inhomogeneous media by wavelet transform; Wavelet henkan ni yoru fukinshitsu baitai no hadoba kaiseki."
Japan.
@misc{etde_472623,
title = {Wavefield analysis in inhomogeneous media by wavelet transform; Wavelet henkan ni yoru fukinshitsu baitai no hadoba kaiseki}
author = {Matsushima, J, Rokugawa, S, Kato, Y, Yokota, T, Miyazaki, T, and Ichie, Y}
abstractNote = {Data processing techniques have been investigated for clarifying structures and physical properties of geothermal reservoirs in the deep underground by seismic exploration using multiple wells. They include the initial motion time-distance tomography, amplitude tomography, diffracted wave tomography, and structure imaging using reflected wave or scattered wave. When applying these data processing methods to observed records, weak and minor signals essentially required are canceled due to averaging the analytical fields. In this study, influence of inhomogeneous media on the wavefield was evaluated. Data were analyzed considering frequency by using wavelet transform by which time-frequency can be easily analyzed. From the time-frequency analysis using wavelet transform, it was illustrated that high frequency scattered waves, generated by scatterer like cracks or by irregularity on the reflection surface, arrive behind direct P-wave and direct S-wave. 5 refs., 8 figs.}
place = {Japan}
year = {1996}
month = {Oct}
}
title = {Wavefield analysis in inhomogeneous media by wavelet transform; Wavelet henkan ni yoru fukinshitsu baitai no hadoba kaiseki}
author = {Matsushima, J, Rokugawa, S, Kato, Y, Yokota, T, Miyazaki, T, and Ichie, Y}
abstractNote = {Data processing techniques have been investigated for clarifying structures and physical properties of geothermal reservoirs in the deep underground by seismic exploration using multiple wells. They include the initial motion time-distance tomography, amplitude tomography, diffracted wave tomography, and structure imaging using reflected wave or scattered wave. When applying these data processing methods to observed records, weak and minor signals essentially required are canceled due to averaging the analytical fields. In this study, influence of inhomogeneous media on the wavefield was evaluated. Data were analyzed considering frequency by using wavelet transform by which time-frequency can be easily analyzed. From the time-frequency analysis using wavelet transform, it was illustrated that high frequency scattered waves, generated by scatterer like cracks or by irregularity on the reflection surface, arrive behind direct P-wave and direct S-wave. 5 refs., 8 figs.}
place = {Japan}
year = {1996}
month = {Oct}
}