地震反射系数的相角变化  

The phase angle change for seismic reflection coefficient

作　　者：孟宪军[1] 刘福平[2,3] 王玉梅[1] 孔庆丰[1] 慎国强[1] 杨长春[3] 

机构地区：[1]中国石化胜利油田有限公司物探研究院,山东东营257022 [2]北京印刷学院.北京102600 [3]中国科学院她质与地球物理研究所.北京100029

出　　处：《石油地球物理勘探》2010年第A01期121-124,共4页Oil Geophysical Prospecting

基　　金：国家863项目(2007AA060500);国家自然基金项目(10705049);北京市自然基金项目(1083011)资助

摘　　要：地震反射系数相角是地震反射波的重要属性之一,对地震资料反演起着重要作用。本文基于Zoeppritz方程,通过算例绘制了反射系数相角曲线,分析了反射系数相角随入射角的变化特点。在入射角小于临界角范围内P波、转换S波的反射系数都有可能存在相角的突变,即有可能存在极性反转,突变位置取决于地层参数;地震波发生广角反射后,反射系数相角随入射角的增大逐步减小,变化范围在0°～-180°之间。The phase angle of the seismic reflection coefficient is one of the important attributes for the seismic reflection wave,It plays an important role in seismic data inversion.Based on the Zoeppritz equation,the reflection coefficient phase angle curve was mapped through calculation example,and the characteristics of the reflection coefficient phase angle varying with the incidence angle was analyzed in this paper.If the incidence angle is less than the critical angle,the sudden change for the phase angle may exist for the reflection coefficients of P-wave and S-wave,polarity reversal may developed,the location of the sudden change depends on the parameters of the strata.When wide angle reflection happens for the seismic wave,the reflection coefficient phase angle gradually decreases with the increase of the incidence angle,varying between.

关 键 词：反射系数 相角 ZOEPPRITZ方程 广角反射 极性反转 

分 类 号：P631.425[天文地球—地质矿产勘探]