Elastic impedance normalization
Elastic impedance normalization
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DOI：
10.1190/1.1451331
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发表时间：
2002
期刊：
影响因子：
3.3
通讯作者：
D. Whitcombe
中科院分区：
文献类型：
--
作者：
D. Whitcombe
弹性阻抗或EI功能使远偏移距角度叠加数据能够使用为声阻抗反演而开发的技术进行反演。EI函数的一个不受欢迎的特征是其维度随入射角θ而变化，并且提供随θ显著改变的数值。通过使用常量αo、βo和ρo修改EI函数可以克服这些问题。这些修改允许以先前公式所不具备的方式在一定角度范围内的弹性阻抗值之间进行直接比较。这些修改既不会提高也不会降低可从EI函数导出的反射率的精度。
The elastic impedance, or EI, function has enabled far-offset-angle stack data to be inverted using technology developed for acoustic impedance inversion. An undesirable feature of the EI function has been that its dimensionality varies with incidence angle θ and provides numerical values that change significantly with θ . These problems have been overcome by modifying the EI function with constants α o , β o , and ρ o . These modifications allow for a direct comparison between elastic impedance values across a range of angles in a manner that was not available with the previous formulation. The modifications neither improve nor degrade the accuracy of the reflectivity that can be derived from the EI function.