摘要
绕射波成像方法能有效地对地下小尺度不连续地质体如断层、裂缝、粗糙岩丘边缘、河道等高精度成像,成像优劣的关键在于如何有效地从原始波场记录中分离反射波和绕射波波场.目前,绕射波分离及绕射波成像方法已逐步成为研究热点.本文系统地回顾了绕射波分离及成像方法的发展历程,分析了反射波和绕射波波场特征,并着重介绍了PWD(平面波分解)解构滤波器及其在叠前、叠后分离并成像绕射波的方法原理,探讨了绕射波成像方法的应用前景.
he imaging method on the diffraction wave field is an effective way to identify the subsurface small scale geological discontinuities such as faults,fractures,coarse rock boundary and watercourse,thus the separation about the diffraction and reflection from the original wave field plays an important part in the high resolution imaging.In recent years,the methods on the diffraction extraction and image are gradually becoming the research focus.In this paper,we systematically review the development history of the separation and imaging method about the diffraction wave field,analyze the characteristics of the reflection and diffraction wave field,and then mainly provide the recommended flowchart of applying PWD to separate and image diffraction wave field on both post-stack and pre-stack record,as well as some application prospects of PWD in future.
出处
《地球物理学进展》
CSCD
北大核心
2012年第6期2499-2510,共12页
Progress in Geophysics
基金
国家973项目(2011CB202402)
国家自然科学基金(41104069
41274124)项目
山东省自然科学基金(ZR2011DQ016)联合资助
关键词
绕射波成像
绕射波分离
PWD滤波器
叠前分离
叠后分离
diffraction imaging
diffraction separation
PWD filtering
pre-stack separation
post-stack separation
