三维各向异性介质三分量数据波型分离

SEPARATION OF WAVE TYPES FROM 3-C DATA OF 3-D ANISOTROPY

长春地质学院地物系,长春130026

Dep. of Geophysical of Changchuen Geological Unuversity

波场分离作为偏移和反演前的准备工作,已显得越来越重要了。各向同性介质的波型分离取得了一定的成效。近来各向异性介质的波型分离也得到了关注,但进展不大。本文提出了在ω—P域对普适的三维各向异性介质三分量资料进行波型分离的方法。它充分利用了本征位移场与采集坐标系中三分量资料的线性关系,通过线性变换、使得qP、qS1、qS2三种波型彻底分离。

It seems more and more important to separate the wave fild as a prepare work before migration and imversion. The separation of wave type of isotropy have some effect. It was noticed that how to separate the wave type of an isotropy but little progress had got.A method for sepqrating the wave types in w-P domain of 3-C data from any 3-D anisotropy mdeium was introduced here. To utilize the linearize relation of 3-C data between normal displacements field and the gathering coordinate, and use the linear Iransformation, we can separte the three types of qP,qSl,qS2 thoroughly.