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| Keywords | |
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time frequency distribution |
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Choi-Williams energy distribution |
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fractured formation |
| Authors | |
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YANG Chuang |
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WANG Zhu-Wen |
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XIANG Min |
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LIU Jing-Hua |
| PubMed | |
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Article by Yang, C. |
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Article by Wang, Z. W. |
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Article by Xiang, M. |
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Article by Liu, J. H. |
Time-frequency characteristics of fractured formation based on Choi-Williams energy distribution
YANG Chuang, WANG Zhu-Wen, XIANG Min, LIU Jing-Hua
College of Geo-exploration Science and Technology��Jilin University��Changchun 130026��China
In order to verify the validity of Choi-Williams energy distribution time- frequency analysis method�� it is used for signal analysis of array acoustic logging�� The study shows that it has a good ability to identify and distinguish the fractured strata and can suppress the cross interference of the multi frequency component signal effec- tively�� and get the time- frequency distribution and characteristics of the acoustic logging signal�� In the compact rock strata��all the waves of acoustic logging signal have no obvious attenuation�� In the fractured strata��the energy of Stoneley wave will be attenuated greatly�� The better fragmentation and permeability of fracture are��the greater effect it has on attenuation of Stonely wave�� The attenuation of S- wave is more obvious in a fracture with better per- meability��