| 声波测井中首波与次首波的理论研究 |
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| 引用本文： | 王秀明,王冠贵.声波测井中首波与次首波的理论研究[J].地球物理学报,1990,33(6):733-739. |
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| 作者姓名： | 王秀明 王冠贵 |
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| 作者单位： | 1. 大庆石油学院，黑龙江 151400;
2. 江汉石油学l究，湖北 434102 |
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| 摘 要： | 本文讨论了裸眼井中由点状声源激发的首波与次首波问题,认为:首波与次首波分别是以地层纵波速度Vc和地层横波速度Vs传播的几何衰减波。同时给出了泄漏波的解析式,而泄漏纵波和泄漏横波的截止频率分别为远场处的首波与次首波的传播特征频率。
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| 关 键 词： | 声波测井 首波与次首波 特征频率 泄漏波 泥浆波 |
| 收稿时间： | 1987-05-08 |
A THEORETIC INVESTIGATION ON COMPRESSIONAL AND SHEAR ARRIVALS IN AN ACOUSTIC LOG |
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| WANG XIU-MING HAN DE-WANG WANG GUAN-GUI.A THEORETIC INVESTIGATION ON COMPRESSIONAL AND SHEAR ARRIVALS IN AN ACOUSTIC LOG[J].Chinese Journal of Geophysics,1990,33(6):733-739. |
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| Authors: | WANG XIU-MING HAN DE-WANG WANG GUAN-GUI |
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| Institution: | 1. Da Qing Petroleum Institute, Heilongjiang 151400;
2. Jiang Han Petroleum Institute, Hubei 434102 |
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| Abstract: | In this paper, the compressional and shear arrivals excited by a point source are analyzed. It is pointed out that the compressional and shear arrivals, propagating along a borehole with Vc and Vs respectively, are attenuated waves. In far-field, their characteristic frequencies are equal to the cut-off frequencies of leaky compressional and shear modes respectively. The elastic wave function of leaky modes has been obtained. |
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| Keywords: | Acoustic logs Compressional arrivals Shear arrivals Characteristic frequencies Leaky modes Fluid waves |
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