井间地震反射波叠加成像的DLCDP法

DLCDP method for the stacking and imaging of crossborehole seismic reflection waves

为了对有倾角地层的井间反射波进行叠加成像，同时减少对初始模型的依赖，提出了一种新方法（DLCDP）。它首先针对倾斜界面进行抽道集，形成井间的超道集，然后利用平均振幅能量准则进行深度、倾角和速度三重扫描，获得井间反射波叠加成像。本文用射线追踪法和声波方程有限差分法制作了合成的井间地震记录，通过模型试算，证实了这种方法的可行性。

Dip layer common depth point(DLCDP) method is put forward so as to stack and image the cross-borehole reflection waves from dip layers with less dependence of initial model. The method includes two main steps:to form cross-borehole supergathers by sorting gathers for dip layers,and to achieve the stacking and imaging of cross-borehole reflection waves by performing the scans of depth,dip angle and veIocity according to average amplitude energy rule. Cross-borehole seismic records are synthesized by using ray tracing and finite difference methods. Model computation has proved the method feasible.