| 套管井中仪器偏心对超声回波的影响 |
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| 引用本文： | 余厚全,屈万里,黄载禄.套管井中仪器偏心对超声回波的影响[J].华中科技大学学报(自然科学版),1997(1). |
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| 作者姓名： | 余厚全 屈万里 黄载禄 |
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| 作者单位： | 华中理工大学电子与信息工程系 |
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| 摘 要： | 根据声波在介质中的传播理论和换能器的声学特性，对在套管井中仪器处于不同偏心情况下的超声回波进行了模拟，研究了偏心对超声回波的影响，并进行了实验验证．数字模拟和实验结果表明：仪器偏心不仅会引起回波信号幅度的变化，而且会导致频谱的改变．当偏心大于４ｍｍ时，对回波的影响比较明显；为了保证套管井测井资料的可靠性，仪器偏心应小于３．５ｍｍ．
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| 关 键 词： | 超声测井 套管 仪器偏心 |
The Influences of Tool Eccentricity in a Casing Well on Ultrasonic Echo |
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| Yu Houquan Doctoral Candidate, Dept. of Electronics & Information Eng.,HUST,Wuhan ,China. Qu Wanli Huang Zailu.The Influences of Tool Eccentricity in a Casing Well on Ultrasonic Echo[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1997(1). |
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| Authors: | Yu Houquan Doctoral Candidate Dept of Electronics & Information Eng HUST Wuhan China Qu Wanli Huang Zailu |
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| Institution: | Yu Houquan Doctoral Candidate, Dept. of Electronics & Information Eng.,HUST,Wuhan 430074,China. Qu Wanli Huang Zailu |
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| Abstract: | According to the theory of sonic propagation in medium and the acoustic characteristics of the ultrasonic transducer, the ultrasonic echoes are simulated under various eccentricities of the tool in a casing well. The influences of tool eccentricity on the echoes are investigated and the experimental verification is carried out. Simulation and experimental results show that the tool eccentricity can not only affect the amplitude, but also the spectrum of the echo. The effects are serious when the eccentricity is larger than 4mm. It is concluded that the eccentricity should be smaller than 3.5mm to guarantee the reliability of the logging data. |
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| Keywords: | ultrasonic logging casing tool eccentricity |
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