井间地震串联滤波波场分离方法

本文根据井间地震波场响应以及多种波场分离方法的性能，采用基于Ｋ－Ｌ变换的特征向量滤波与中值滤波相结合的串联滤波方法分离井间地震观测到的上、下行反射波。数值计算结果表明：在波场分离过程中，由于同时综合考虑了地震波能量主分量分布以及反射波同相轴时差两个参数，使得分离效果明显、处理更为简便，具有滤波特征矢量的选取条件更为宽松、无需精确确定拉平轴的时间等特点。

WAVE FIELD SEPARATION WITH A CASCADED FILTER ON CROSSWELL SEISMIC DATA

This paper presents a cascaded filter to separate the upgoing and downgoing reflection waves of crosswell seismic data, which is based on the K L transform and median filter. The excellent separating results of a synthetic common shot gather of crosswell seismic data show that the main advantages of this approach are that there is no difficulty to select the first few eigenimages for a low pass filter and that there is no need to pick up the time of an arrival accurately, which will be horizontally aligned.