Chin. Phys. Lett.  2010, Vol. 27 Issue (9): 094301    DOI: 10.1088/0256-307X/27/9/094301
FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
Imaging for Borehole Wall by a Cylindrical Linear Phased Array

ZHANG Bi-Xing1,2, SHI Fang-Fang1, WU Xian-Mei1, GONG Jun-Jie1, ZHANG Cheng-Guang2

1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190 2School of Geophysics and Oil Resources, Yangtze University, Jingzhou 434023
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ZHANG Bi-Xing, SHI Fang-Fang, WU Xian-Mei et al  2010 Chin. Phys. Lett. 27 094301
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Abstract

A new ultrasonic cylindrical linear phased array (CLPA) transducer is designed and fabricated for the borehole wall imaging in petroleum logging based on the previous theoretical researches. First, the CLPA transducer, which is made up of numbers of the piezoelectric elements distributed on the surface of a cylinder uniformly, is designed and fabricated. By transmitting and receiving acoustic waves with 16 active elements and using different groups of the elements under the control of the electric system, the CLPA can scan all areas of the borehole wall dynamically and rapidly without a traditional mechanism around the borehole axis. Then, the theoretical and experimental investigations are conducted in detail for the borehole wall scanning and imaging by the steel pipe and casing borehole with defects distributed in different shapes and directions. It is shown by experiments that the CLPA transducer has good focusing characteristic and good resolution for the borehole wall imaging in acoustic logging.

Keywords: 43.20.+g      43.35.+d      43.40.+s      43.60.+d     
Received: 07 January 2010      Published: 25 August 2010
PACS:  43.20.+g (General linear acoustics)  
  43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound)  
  43.40.+s (Structural acoustics and vibration)  
  43.60.+d (Acoustic signal processing)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/27/9/094301       OR      https://cpl.iphy.ac.cn/Y2010/V27/I9/094301
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ZHANG Bi-Xing
SHI Fang-Fang
WU Xian-Mei
GONG Jun-Jie
ZHANG Cheng-Guang
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[13] Shi F F 2009 PhD Thesis (Institute of Acoustics, Chinese Academy of Sciences)
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