零相位改进型最小熵反褶积方法  

Minimum entropy deconvolution using zero phase restriction

作　　者：李国发[1] 李观寿 张立勤[2] 

机构地区：[1]大港石油管理局物探公司计算中心,300280 [2]大港石油管理局地质研究院

出　　处：《石油地球物理勘探》1996年第3期359-366,共8页Oil Geophysical Prospecting

摘　　要：本文对常规最小熵反褶积方法中存在的一些问题进行了探讨和改进：①为克服最小熵反褶积对弱反射的压制作用，本文采用对数型规范方差模准则；②为了减少最小熵反褶积对输入记录相位的改造，本文对反褶积算子加入了零相位约束；③为了克服局部极值问题并加速收敛，本文按输入记录傅氏谱的特征给出了确定迭代初始滤波器的方法。理论和实际资料处理表明，该方法是一种较理想、较实用的反褶积方法。Some problems in usual minimum entropy deconvolutions are analysed and improved in the following aspects:. The criterion of logarithmic canonical variance modulo is used to eliminatethe negative influence of minimum entropy deconvolution upon weak refIectionwaves.. Zero phase restriction is introduced into deconvolution operator so as to reduce the phase change of input data which is caused by minimum entropy deconvolution.. The method for determining iterative initial filter according to the characteristics of Fourier spectrum of input data is given to solve local extremum problemand to speed up convergence.Theoretical and real data processing results show that this method is a satisfactory and practical deconvolution method.

关 键 词：零相位 最小熵反褶积 地震勘探 地震数据 

分 类 号：P631.443[天文地球—地质矿产勘探]