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Nonstationary local signal-and-noise orthogonalization
Geophysics ( IF 3.3 ) Pub Date : 2021-08-18 , DOI: 10.1190/geo2020-0151.1
Yangkang Chen 1 , Sergey Fomel 1
Affiliation  

The local signal-and-noise orthogonalization method has been widely used in the seismic processing and imaging community. This method uses a fixed triangle smoother for regularizing the local orthogonalization weight, which is based on the assumption that the energy is homogeneously distributed across the whole seismic profile. The fixed triangle smoother limits the performance of the local orthogonalization method in processing complicated seismic data sets. We have developed a new local orthogonalization method that uses a variable triangle smoother. The nonstationary smoothing radius is obtained by solving an optimization problem in which the low-pass-filtered seismic data are matched by the smoothed data in terms of the local frequency attribute. The new local orthogonalization method with the nonstationary model smoothness constraint is called the nonstationary local orthogonalization method. We have proven the successful performance of the new method using several synthetic and field data evaluations.

中文翻译:

非平稳局部信噪正交化

局部信噪正交化方法已广泛应用于地震处理和成像领域。该方法使用固定三角形平滑器来规范局部正交化权重,这是基于能量在整个地震剖面上均匀分布的假设。固定三角形平滑器限制了局部正交化方法在处理复杂地震数据集时的性能。我们开发了一种新的局部正交化方法,该方法使用可变三角形平滑器。非平稳平滑半径是通过求解低通滤波地震数据与平滑数据在局部频率属性方面匹配的优化问题获得的。新的具有非平稳模型平滑约束的局部正交化方法称为非平稳局部正交化方法。我们已经使用多种合成和现场数据评估证明了新方法的成功性能。
更新日期:2021-08-19
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