Effects of electric-acoustic and acoustic-electric conversions of transducers on acoustic logging signal |
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| Authors: | Lin Fa WenYan Xie Yong Tian MeiShan Zhao Li Ma DaQun Dong |
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| Institution: | 1 School of Electronics Engineering, Xi’an University of Post and Telecommunications, Xi’an 710121, China; 2 PetroChina Liaohe Oilfield Company, Panjin 124013, China; 3 The James Franck Institute and Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA; 4 Department of Digital Media and Art, Xi’an University of Post and Telecommunications, Xi’an 710121, China; 5 School of Marine Engineering, Northwest Polytechnical University, Xi’an 710071, China |
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| Abstract: | Based on an acoustic logging transmission network and the engineering pattern of a sliding wave in acoustic logging, analysis
and calculations have been performed in a study of the effects of the electric-acoustic and acoustic-electric conversions
of the transducers on the acoustic logging signal. The results show that acoustic-electric conversion through the transducer
can cause not only a serious disturbance in the signal amplitude, but also an apparent transmission delay. For engineering
applications, the amplitude variation and transmission delay must be accounted for in a practical analysis of the acoustic
logging signal in rocks. The results also show that with enhanced understanding and proper justification, the error caused
by the acoustic-electric conversion can be significantly reduced in evaluation of the cement bond quality of a cased well,
and the accuracy of rock porosity calculated using the measured acoustic velocity can be increased. |
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| Keywords: | transducer acoustic-electric conversion transmission delay |
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