| Acousto-electric well logging by eccentric source and extraction of shear wave |
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| 作者姓名： | 崔志文 王克协 胡恒山 孙建国 |
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| 作者单位： | Department of Acoustics and Microwave Physics, School of Physics,Jilin University, Changchun 130021, China;College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China;Department of Acoustics and Microwave Physics, School of Physics,
Jilin University, Changchun 130021, China;Department of Astronautics and Mechanics,
Harbin Institute of Technology, Harbin 150001,
China;College of Geoexploration Science and Technology, Jilin University, Changchun
130026, China |
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| 基金项目： | Project supported by National Natural Science Foundation of China
(Grant Nos 10534040 and 10272038) and Doctorate Foundation
of the State Education Ministry of China
(Grant Nos 20040183045 and 20030183052). |
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| 摘 要： | The nonaxisymmetric acousto-electric field excited by an eccentric acoustic source in the borehole based on Pride seismoelectric theory is considered. It is shown that the acoustic field inside the borehole, converted electric and magnetic fields and coupled fields outside the borehole are composed of an infinitude of multipole fields with different orders. The numerical results show that both the electromagnetic waves and the seismoelectric field in the borehole, and the three components of both electric field and magnetic field can be detected. Measurements on the borehole axis will be of advantage to determining shear velocity information. The components of the symmetric and nonsymmetric acoustic and electromagnetic fields can be strengthened or weakened by adding or subtracting the two full waveforms logged in some azimuths. It may be a new method of directly measuring the shear wave velocity by using the borehole seismoelectric effect.
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| 关 键 词： | 声电测井 偏心声源 剪力波 提取 多孔介质 |
| 收稿时间： | 6/6/2006 12:00:00 AM |
| 修稿时间： | 2006-06-062006-09-12 |
Acousto-electric well logging by eccentric source and extraction of shear wave |
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| Cui Zhi-Wen,Wang Ke-Xie,Hu Heng-Shan and Sun Jian-Guo.Acousto-electric well logging by eccentric source and extraction of shear wave[J].Chinese Physics B,2007,16(3):746-752. |
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| Authors: | Cui Zhi-Wen Wang Ke-Xie Hu Heng-Shan and Sun Jian-Guo |
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| Institution: | 1.Department of Acoustics and Microwave Physics, School of Physics, Jilin University, Changchun 130021, China ;2.Department of Astronautics and Mechanics, Harbin Institute of Technology, Harbin 150001, China ;3. College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China |
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| Abstract: | The nonaxisymmetric acousto-electric field excited by
an eccentric acoustic source in the borehole based on Pride seismoelectric
theory is considered. It is shown that the acoustic field inside the borehole,
converted electric and magnetic fields and coupled fields outside the borehole
are composed of an infinitude of multipole fields with different orders.
The numerical results show that
both the electromagnetic waves and the seismoelectric field in the borehole,
and the three components of both electric field and magnetic field
can be detected. Measurements on the borehole axis will be of
advantage to determining shear velocity information. The components
of the symmetric and nonsymmetric acoustic and electromagnetic fields
can be strengthened or weakened by adding or subtracting the two full
waveforms logged in some azimuths. It may be a new method of directly
measuring the shear wave velocity by using the borehole
seismoelectric effect. |
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| Keywords: | porous media seismoelectric well logging acoustic source |
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