| 横向各向同性介质中P波辐射图案和振幅炮检距关系 |
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| 引用本文： | 寻浩,董敏煜. 横向各向同性介质中P波辐射图案和振幅炮检距关系[J]. 中国石油大学学报(自然科学版), 1998, 0(1) |
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| 作者姓名： | 寻浩 董敏煜 |
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| 作者单位： | 石油大学地球科学系 |
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| 摘 要： | 地震波在向下传播到反射层并返回地面的过程中，速度各向异性引起的能量聚焦会改变入射和反射波前的能量分布，从而使ＡＶＯ（振幅炮检距关系）特征发生畸变。用解析方法和数值方法分析了横向各向同性介质中的Ｐ波辐射图案。计算结果表明，弱各向异性对ＡＶＯ的影响不容忽视。目前对ＡＶＯ的解释中出现陷井的原因是未考虑各向异性。所给出的近似公式能方便地用于估计Ｐ波幅射图案畸变对ＡＶＯ变化趋势的影响。
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| 关 键 词： | 地震波；横向；各向同性；介质；反射波；波形；辐射；振幅 |
P WAVE RADIATION PATTERNS AND AMPLITUDE VERSUS OFFSET IN TRANSVERSELY ISOTROPIC MEDIA |
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| Xun Hao,Dong Minyu. P WAVE RADIATION PATTERNS AND AMPLITUDE VERSUS OFFSET IN TRANSVERSELY ISOTROPIC MEDIA[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 1998, 0(1) |
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| Authors: | Xun Hao Dong Minyu |
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| Abstract: | Energy focusing resulting from velocity anisotropy can be used to modify the distribution of eneryg along the wavefront of the wave traveling down to the reflector and back up to the surface,which can distort signatures of AVO (amplitude versus offset). P wave radiation patterns in transversely isotropic media are analyzed by using analytical and numerical methods. Calculation shows that the effect of weak isotropy on AVO should not be neglected.The given approximate expression can provide a convenient way to estimate the impact of the distortions of the radiation patterns on AVO. |
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| Keywords: | seismic wave lateral isotropic media reflected wave waveform radiation amplitude |
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