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用零偏移距VSP不同深度点上观测的直达子波振幅,可直接提取有限测试距离上的振幅衰减值,进而求得不同频率时介质的吸收系数、品质因数、波阻抗参数及介质吸收系数与频率的关系本文根据模型地震试验,提供了VSP直达子波振幅衰减值的提取方法,并从数值上给出了各种参数的实验结果。定量研究这些参数有助于揭示介质的力学性质及空间分布。
With the direct wavelet amplitude observed at different depth points of zero offset VSP, the amplitude attenuation value of the finite test distance can be directly extracted, and then the absorption coefficient, quality factor, wave impedance parameter and dielectric absorption coefficient According to the model earthquake test, this paper provides a method to extract the amplitude attenuation value of VSP direct wavelet, and gives the experimental results of various parameters numerically. Quantitative study of these parameters helps to reveal the mechanical properties and spatial distribution of the medium.