| 实验室岩心声学速度测试中的频散现象 |
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| 引用本文： | 任科英.实验室岩心声学速度测试中的频散现象[J].石油地球物理勘探,2011(5):779-782,836,665. |
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| 作者姓名： | 任科英 |
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| 作者单位： | 中海石油(中国)有限公司湛江分公司研究院;中国地质大学(武汉)资源学院; |
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| 基金项目： | 国家重大专项(2008ZX05023-004)资助 |
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| 摘 要： | 本文主要对实验室岩心测试中由于高频引起的速度频散现象进行研究。研究中主要采用Gassmann方程计算了干岩样盐水饱和后的纵、横波速度,代替地震勘探频率下的纵、横波速度,并与盐水饱和样品的实测速度进行对比,由此估计速度频散的大小。通过对不同地区实例的研究发现:对物性较好的样品,频散现象较小,此时基于岩心测试数据所作的岩石物理研究可以用来指导地震勘探研究;而对物性较差的样品,频散现象较为明显,此时要审慎应用测试的数据。
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| 关 键 词： | 速度频散现象 岩心声学测试 盐水饱和速度 对比速度 Gassmann方程 |
Velocity dispersion of ultrasonic core measurement in laboratory |
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| Ren Ke-ying,..Zhanjiang Branch of CNOOC Ltd,Zhanjiang,Guangdong ,China.China University of Geosciences,Wuhan,Hubei ,China.Velocity dispersion of ultrasonic core measurement in laboratory[J].Oil Geophysical Prospecting,2011(5):779-782,836,665. |
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| Authors: | Ren Ke-ying Zhanjiang Branch of CNOOC Ltd Zhanjiang Guangdong ChinaChina University of Geosciences Wuhan Hubei China |
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| Affiliation: | Ren Ke-ying1,2.1.Zhanjiang Branch of CNOOC Ltd,Zhanjiang,Guangdong 524057,China2.China University of Geosciences(Wuhan),Wuhan,Hubei 430074,China |
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| Abstract: | This paper mainly discusses velocity dispersion due to high frequency in ultrasonic core measurement of laboratory.We adopt Gassmann's equation to calculate V_P and V_S of the brine-saturation core sample,then contrasted them to actual measured ultrasonic velocities of the samples.Therefore the magnitude of velocity dispersion is estimated.Through research of a few examples in 2 areas in South China Sea,we have found the following discoveries: When the properties of reservoir samples are good,the velocity d... |
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| Keywords: | velocity dispersion phenomena core ultrasonic measurements acoustic velocity of brine-saturated samples contrastive velocity Gassmann's equation |
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