| 岩石声频散的实验研究及声波速度的外推 |
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| 引用本文： | 张元中,楚泽涵,李铭,罗曼.岩石声频散的实验研究及声波速度的外推[J].地球物理学报,2001,44(1):103-111. |
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| 作者姓名： | 张元中 楚泽涵 李铭 罗曼 |
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| 作者单位： | 石油大学地球科学系,北京 102200 |
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| 基金项目： | 中国海洋石油总公司“863”计划资助项目 |
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| 摘 要： | 对岩石声频散进行了实验研究，用不同频率的声学探头使用超声波脉冲穿透法对砂岩和泥岩样品进行了测量，并分析了两者的频散现象.结果表明：在51kHz-1MHz频率范围内，在干燥状态下岩芯有频散现象；在饱水状态下，砂岩的频散现象更明显，岩芯中流体的存在是影响纵波频散的一个重要原因.利用频散方程计算不同频率时的速度值，并与实验结果进行了比较，说明频散方程可以较好的描述砂岩与泥岩的频散关系.
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| 关 键 词： | 砂岩 泥岩 声频散 实验 外推 |
| 文章编号： | 0001-5733(2001)01-0103-09 |
| 收稿时间： | 2000-02-28 |
AN EXPERIMENTAL STUDY OF ACOUSTIC DISPERSION OF ROCK AND EXTRAPOLATION OF THE VELOCITY |
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| ZHANG YUAN,ZHONG,CHU ZE,HAN,LI MING,LUO MAN.AN EXPERIMENTAL STUDY OF ACOUSTIC DISPERSION OF ROCK AND EXTRAPOLATION OF THE VELOCITY[J].Chinese Journal of Geophysics,2001,44(1):103-111. |
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| Authors: | ZHANG YUAN ZHONG CHU ZE HAN LI MING LUO MAN |
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| Affiliation: | Department of Geoscience, University of Petroleum, Beijing 102200, China |
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| Abstract: | The acoustic dispersion of rocks is investigated with experimental method samples of sandstone and shale are measured at different frequencies with ultrasonic pulse penetration method, and then the acoustic dispersions are analyzed. The results show that the dispersion exists in both dry and water saturated sandstone. The water in the rock has important impact on the acoustic dispersion. The velocity of the different frequencies are calculated by the dispersion equation and compared with the measured values, the results show that the dispersions in sandstone and shale are good agreement with the dispersion equation. |
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| Keywords: | Sandstone Shale Acoustic dispersion Experiment Extrapolation |
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