τ—q变换法波场分离
|
摘要
在众多的纵、横波分离方法中.τ-p变换法具有一定的优势、但是,纵、横波的能量在τ-p域往往相互重叠,不容易分开.文中在τ-p变换的基础上对波场分离方法作了改进,提出一种经坐标拉伸的τ-p变换法,称为τ-q变换.在τ-q变换域,纵、横彼的能量分别汇聚到左右分开的不同q的一些点上,因此易于实现分离.合成记录和实际资料的试验证明该方法是可行的.
Various approaches have been proposed to separate P-and S-wave reflections from vector seismic data. Of all the approaches, the τ-p transform method may be comparatively superior when applied to real siesmic data. But in the τ-p domain,the P- and S-wave events may be overlapped and difficult to separate. We improve the τ-p transform methods and propose what we call τ-q transform method. In the transformed τ-q domain the P-and S-wave reflections will be focused onto some non-overlapped points and can be separated easily. Tests on synthetic recordings and real data show that the method is effective and not sensitive to S/N ratio of the data.
Various approaches have been proposed to separate P-and S-wave reflections from vector seismic data. Of all the approaches, the τ-p transform method may be comparatively superior when applied to real siesmic data. But in the τ-p domain,the P- and S-wave events may be overlapped and difficult to separate. We improve the τ-p transform methods and propose what we call τ-q transform method. In the transformed τ-q domain the P-and S-wave reflections will be focused onto some non-overlapped points and can be separated easily. Tests on synthetic recordings and real data show that the method is effective and not sensitive to S/N ratio of the data.
引文
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心