| 井内偏心声源激发的三维声场的数值研究 |
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| 引用本文： | 沈建国,张海澜. 井内偏心声源激发的三维声场的数值研究[J]. 地球物理学报, 2000, 43(2): 279-286 |
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| 作者姓名： | 沈建国 张海澜 |
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| 作者单位： | 中国科学院声学研究所,北京100080 |
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| 基金项目： | 国家自然科学基金!19574064 |
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| 摘 要： | 为了研究环形声波测井仪和扇区水泥胶结测井仪的工作原理，本文利用实轴积分 法计算了井内靠近井壁的偏心声源激发的声场，得到了在井壁不同位置的接收波形，分析了 直达波、井壁反射波、纵波、横波和面波在这些波形中的反映．偏心声源激发的三维声场没有 轴对称性，比井轴上的居中声源的情况复杂．
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| 关 键 词： | 偏心声源 声波测井 环形声波 扇区水泥胶结测井 |
| 收稿时间： | 1998-12-31 |
NUMERICAL STUDY ON 3D ACOUSTIC FIELD GENERATED BY ECCENTRIC SOURCES IN BOREHOLE |
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| SHEN JIAN-GUO,ZHANG HAI-LAN. NUMERICAL STUDY ON 3D ACOUSTIC FIELD GENERATED BY ECCENTRIC SOURCES IN BOREHOLE[J]. Chinese Journal of Geophysics, 2000, 43(2): 279-286 |
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| Authors: | SHEN JIAN-GUO ZHANG HAI-LAN |
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| Affiliation: | Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | To investigate the principle of two new logging tools, Circumferenctial Acoustical Device (CAD) and Sector Bond Tool(SBT), the real axis integration is used to study the 3 dimension acoustic field generated by a source close to the borehole wall. Waveforms at different positions on the wall of a pulse sourcer with the center frequency of 85kHz are calculated and analysed. The waveforms are composed of the direct wave, reflected wave, longitudinal wave, shear wave and interface wave. |
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| Keywords: | Eccentric source Well logging Circumferential acoustical device Sector bond tool. |
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