近地表散射波的叠后衰减  

Post-stack attenuation of near-surface scattered wave.

作　　者：郭向宇[1] 凌云[1] 魏修成[2] 

机构地区：[1]石油地球物理勘探局 [2]石油大学

出　　处：《石油地球物理勘探》2002年第3期201-208,共8页Oil Geophysical Prospecting

摘　　要：近地表的地形起伏变化和岩性变化可能引发近地表的散射波 ,这种次生干扰波在时距关系、频率特性等方面都与反射波和绕射波相似 ,在记录上的识别和压制有一定的困难。利用散射波的波动特性 ,在叠后通过波场延拓使其聚焦成像 ,然后通过压制强噪声的手段将其衰减 ,是我们对这种噪声研究的一种新的探索。The near surface scattered wave can be caused by near surface topographical relief and variation of lithological change,this secondary interference is similar to reflection and diffraction in time distance relation and character of frequency,which brings about some difficulty in its recognition and suppression on the records. Making a new approach to study this noise by us is using wave character of scattered wave,by post stack wave field continuation to make imaged,and then make it attenuated by means of strong noise attenuation method.

关 键 词：近地表散射波 叠后衰减 散射波 次生干扰 波场延拓 偏移成像 中值滤波 地震勘探 

分 类 号：P631.44[天文地球—地质矿产勘探]