| 岩块超声横波速度高精度测试方法试验研究 |
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| 引用本文： | 魏建新,狄帮让.岩块超声横波速度高精度测试方法试验研究[J].中国石油大学学报(自然科学版),2011(6). |
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| 作者姓名： | 魏建新 狄帮让 |
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| 作者单位： | 中国石油大学油气资源与探测国家重点实验室;中国石油大学CNPC物探重点实验室;中国石油大学地球物理与信息工程学院; |
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| 基金项目： | 国家科技重大专项课题(2008ZX05004-003) |
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| 摘 要： | 通过不同振动特性和直径的纵横波换能器,利用3种超声波速度测试方法对不同内部结构的大样品进行测试精度研究。试验结果表明:大块岩石横波速度的超声测试精度会受到岩石内部结构和测试方法的影响;垂直透射法可以获得较高测试精度的横波速度,剪切横波也可以得到岩石的非均质性和各向异性程度的信息;间接测试法只能用横波换能器才可以进行横波速度测试,测试到的是岩石横波的平均速度,受岩石内部结构和换能器振动特征的影响,间接法的测试精度会有较大的误差,选用合适的频率和小直径换能器,并增大发射能量可以提高间接法的横波速度测试精度。
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| 关 键 词： | 横波速度测试 岩石试块 间接测试法 超声换能器 测试精度分析 |
Experimental research on ultrasonic method based on laboratory measurement for accurate estimation of shear wave velocity |
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| WEI Jian-xin,,DI Bang-rang.Experimental research on ultrasonic method based on laboratory measurement for accurate estimation of shear wave velocity[J].Journal of China University of Petroleum,2011(6). |
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| Authors: | WEI Jian-xin DI Bang-rang |
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| Institution: | WEI Jian-xin1,2,3,DI Bang-rang 1,3 (1.State Key Laboratory of Petroleum Resource and Prospecting in China University of Petroleum,Beijing 102249,China,2.CNPC Key Physical Exploration Laboratory in China University of Petroleum,3.College of Geophysics and Information Engineering in China University of Petroleum,China) |
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| Abstract: | Through P-and S-waves transducers with various vibration characteristics and diameters,the measurement accuracy of huge size samples with different internal structures was studied by three kinds of ultrasonic measurement techniques.The experimental results show that the measurement accuracy of shear-wave velocity is greatly influenced by internal structure of rock samples and measurement methods.Compared with other measurement methods,transmission method can obtain relatively high measurement accuracy of sh... |
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| Keywords: | shear-wave velocity measurement rock samples indirect measurement method ultrasonic transducers measurement accuracy analysis |
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