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APPLIED GEOPHYSICS  2018, Vol. 15 Issue (1): 118-124    DOI: 10.1007/s11770-018-0655-z
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Automatic pickup of arrival time of channel wave based on multi-channel constraints
Wang Bao-Li1
1. Xi’an Research Institute of China Coal Technology & Engineering Group, Xi’An 710077, China.
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Abstract Accurately detecting the arrival time of a channel wave in a coal seam is very important for in-seam seismic data processing. The arrival time greatly affects the accuracy of the channel wave inversion and the computed tomography (CT) result. However, because the signal-to-noise ratio of in-seam seismic data is reduced by the long wavelength and strong frequency dispersion, accurately timing the arrival of channel waves is extremely difficult. For this purpose, we propose a method that automatically picks up the arrival time of channel waves based on multi-channel constraints. We first estimate the Jaccard similarity coefficient of two ray paths, then apply it as a weight coefficient for stacking the multi-channel dispersion spectra. The reasonableness and effectiveness of the proposed method is verified in an actual data application. Most importantly, the method increases the degree of automation and the pickup precision of the channel-wave arrival time.
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Key wordsseismic channel wave   dispersion   multi-channel constraint   Jaccard similarity coefficient   arrival time picking     
Received: 2017-10-31;
Fund:

This work is supported?by?the National Major Scientific and Technological Special Project during the 13th Five-year Plan Period (No. 2016ZX05045003-005).

Cite this article:   
. Automatic pickup of arrival time of channel wave based on multi-channel constraints[J]. APPLIED GEOPHYSICS, 2018, 15(1): 118-124.
 
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