τ—q变换法波场分离

SEPARATION OF P-AND S-WAVE FIELDS VIA THE τ—q TRANSFORM

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域往往相到重叠，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、横波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.