文献类型：期刊文献

中文题名：随机-均匀介质散射波特征相干分析研究

英文题名：Coherence analysis of scattered wave characteristics in random-uniform medium

作者：李灿苹[1];刘学伟[2];李颖[1];赵桂艳[1]

机构：[1]广东海洋大学信息学院,湛江524088;[2]中国地质大学(北京)地球物理与信息技术学院,北京100083

年份：2009

卷号：24

期号：4

起止页码：1392

中文期刊名：地球物理学进展

外文期刊名：Progress in Geophysics

收录：CSTPCD、、CSCD2011_2012、北大核心2008、北大核心、CSCD

基金：广东海洋大学人才引进专项基金项目(0812182);国家重点基础研究发展973计划课题(2009CB219505)资助

语种：中文

中文关键词：随机介质;自相关长度;散射波特征;相干技术

外文关键词：random medium, autocorrelation lengths, scattering wave characteristics, coherence technique

中文摘要：基于统计学方法建立了随机-均匀介质模型,利用有限差分法进行正演模拟,根据地震剖面中散射波同相轴随着模型横向自相关长度的增大其连续性逐渐变好的特点,通过相干技术研究了散射波同相轴的连续性.研究结果表明,当模型横向自相关长度与地震波长比值较小(a/λ<1)时,散射波同相轴连续性较差,其相干值变化不明显;当模型横向自相关长度与地震波长比值较大(a/λ>1)时,散射波同相轴连续性明显变好,其相干值明显增大.

外文摘要：A random-uniform medium model was constructed based on the statistical method and was forward modeled using the finite-difference method. According to the feature that the continuity of scattered waves in seismic sections gradually becomes better with lateral autocorrelation lengths in models becoming larger, event continuity of scattered wave was studied by coherence technique. The research results show that event continuity of scattered wave is worse when the ratio of lateral autocorrelation length to seismic wavelength is smaller （a/λ〈 1）, and the coherence values variety is not obvious. When the ratio of lateral autoeorrelation length to seismic wavelength is larger （a/λ〉1）, event continuity of scattered wave becomes better obviously, and the coherence values increase distinctly.