| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Coupling of Acoustical Plane p-Wave to a Cased Borehole |
| QIU Chang-Chun1, ZHANG Bi-Xing1, ZHANG Yu-Jun2, CUI Zhi-Wen2 |
| 1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 1001902College of Physics, Jilin University, Changchun 130023 |
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| Cite this article: |
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QIU Chang-Chun, ZHANG Bi-Xing, ZHANG Yu-Jun et al 2009 Chin. Phys. Lett. 26 114301 |
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Abstract Theoretical and numerical study on the coupling acoustic field of the plane p-wave to a cased borehole is carried out. The medium outside the cased borehole is modeled as the porous medium. The scattering field characteristics in the cased borehole are investigated when a plane fast p-wave is incident in tilt to the cased borehole from the porous medium. The scattering fields inside and outside the cased borehole are analyzed and deduced by Biot's theory under the boundary conditions on each interface, and they are numerically studied. It is found that the scattering field has strong resonant characteristics and there exists a series of resonant frequencies and peaks. The effects of the frequency, radii of each interface, incident angle, porosity, and other parameters on the resonant acoustic field have been investigated in detail in the fast and slow formations respectively.
The resonant characteristics of the scattering field are also analyzed from the physical sense.
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| Keywords:
43.20.+g
43.35.+d
43.60.+d
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Received: 11 May 2009
Published: 30 October 2009
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| PACS: |
43.20.+g
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(General linear acoustics)
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43.35.+d
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(Ultrasonics, quantum acoustics, and physical effects of sound)
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43.60.+d
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(Acoustic signal processing)
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[1] White J E 1953 J. Acoust. Soc. Am. 25 906
[2] Blair D P 1984 Geophysics 49 398
[3] White J E and Welsh E 1988 Geophysical Prospecting 36 417
[4] Wang K X, White J E and Wu X Y 1996 Chin. J.Geophys. 39 133
[5] Qiu C C 2008 Master Degree Thesis (Jilin University)
[6] Pao Y H and Mow C C1976 J. Acoust. Soc. Am. 591046
[7] Biot M A 1956 J. Acoust. Soc.Am. 28 168
[8] Biot M A 1956 J. Acoust. Soc.Am. 28 179
[9] Hu H S 2003 ACTA Phys. Sin. 52 1954 (inChinese)
[10] Zhang B X, Wang K X and Dong Q D 1995 J. Acoust.Soc. Am. 97 3462
[11] Zhou S H, Wang K X and Ma J et al 1995 Chin. J.Geophys. 38 1195
[12] Zhang B X, Wang K X and Dong Q D 1996 J. Acoust.Soc. Am. 99 682
[13] Carcione J M and Picotti S 2006 Geophysics 71 |
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