基于各向异性扩散滤波的地震图像增强处理  

Seismic image enhancement based on anisotropic diffusion

作　　者：严哲[1] 顾汉明[1] 蔡成国[1] 

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院,湖北武汉430074

出　　处：《石油地球物理勘探》2013年第3期390-394,506+327-328,共5页Oil Geophysical Prospecting

基　　金：国家自然科学基金项目(41104063);中国地质大学(武汉)中央高校基本科研业务费专项资金资助项目(CUG130103)联合资助

摘　　要：为了在提高地震资料信噪比的同时,保护断层等重要构造信息在处理过程中不受到破坏,本文将地震相干属性值作为断层信息保护因子引入到各向异性扩散滤波中,并提出了一种基于各向异性扩散滤波的地震图像增强处理方法。文中首先介绍了该算法的基本原理,然后通过模型试算验证算法的效果,最后对实际数据的处理效果进行了分析,并将此方法与基于Kuwahara滤波的保边增强技术进行了对比。结果表明,该法在保护断层等构造信息的同时,提高了资料的信噪比和可解释性,可为后期的自动或者人工构造解释提供了更好的数据基础。With technology development in seismic data processing and interpretation,automatic interpretation of seismic data became possible.However,automatic interpretation of seismic data requires higher signal noise ratio(SNR).In order to improve the SNR of seismic data and preserve fault and other information,we propose here a new seismic image processing method based on anisotropic diffusion.This approach has three ingredients: firstly,computing the structure tensor which providing the information on local orientation of the reflection layers;then,applying the seismic coherence attribution in the diffusion tensor as the faults preserving factor;and finally,smoothing along the reflection layers and preserving the faults.Both model and real data examples show that this method obtains remarkable improvements.

关 键 词：各向异性扩散 断层信息保护 地震图像增强 

分 类 号：P631[天文地球—地质矿产勘探]