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Multi-Frequency Crosswell Seismic Experiment  

Lee, Doo-Sung (Information System Engineering, Hansung University)
Publication Information
Geophysics and Geophysical Exploration / v.10, no.4, 2007 , pp. 223-228 More about this Journal
Abstract
First arrival signals of multi-frequency crosswell seismic data, acquired in wells drilled in granitic rock, were analyzed to investigate the characteristic behavior of the signals at the shear zones. Dominant frequencies of the sources were; 10-, 20-, 40-, 56-, and 80 kHz. No obvious changes in the waveform at the shear zones were found; however, at the shear zones, some degree of velocity reductions were observed in the signals of all frequency sources. The 80 kHz signal is slightly faster than 10 kHz signal in the survey region, and the velocity difference between the two signals were found largest at the shear zone where the permeability measured greatest in the survey interval.
Keywords
Multi-Frequency; Shear Zones;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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