复杂地表条件下倾角分解法共反射面元(CRS)叠加

摘要

We present an extension of the Common Reflection Surface (CRS) stack that provides support for an arbitrary top surface topography. CRS stacking can be applied to the original prestack data without the need for any elevation statics. The CRS-stacked zero offset section can be corrected (redatumed) to a given planar level by kinematic wave field attributes. The seismic processing results indicate that the CRS stacked section for rugged surface topography is better than the conventional stacked section for S/N ratio and better continuity of reflection events. Considering the multiple paths of zero-offset rays, the method deals with reflection information coming from different dips and performs the stack using the method of dip decomposition, which improves the kinematic and dynamic character of CRS stacked sections.%通过对CRS叠加的改进,将复杂地表的影响考虑在内.这样,复杂地表条件下的CRS叠加就可以直接应用于未作静校正的数据.在基准面重建时,利用CRS运动学波场参数可将CRS叠加剖面校正到一选定的水平面上.地震数据的试算表明,复杂地表CRS叠加得出的剖面与常规处理剖面相比有着较高的信噪比和同相轴连续性.考虑到射线存在多路径的情况,通过倾角分解的方法,将来自各个角度的有效反射信息分别进行处理并参与叠加,有效的改善了CRS叠加剖面的质量.