地质条件复杂地区瑞雷波勘探正演模拟  

Forward modeling of Rayleigh wave exploration in geologically complicated areas

作　　者：侯世宁 薛海飞[2] 董守华[2] 于鹏飞[2] 智敏[3] 

机构地区：[1]河南永煤集团股份有限公司,河南永城476600 [2]中国矿业大学资源与地球科学学院,江苏徐州221116 [3]煤炭科学研究总院西安研究院,陕西西安710054

出　　处：《煤田地质与勘探》2010年第6期66-70,共5页Coal Geology & Exploration

基　　金：国家重点基础研究发展计划(973计划)项目(2009CB219603);国家科技重大专项(2008ZX05035)

摘　　要：为研究复杂地质条件对瑞雷面波频散曲线的影响,采用有限差分地震数值模拟方法,对3种模型进行正演模拟,得出了某一时刻的波场快照与单炮记录。对模拟记录进行频散分析的结果表明:单层均匀介质没有频散现象;起伏地表两层均匀介质的频散曲线相速度只和介质本身的参数有关,不受地形的影响;水平地表含软夹层介质中,瑞雷波频散现象非常明显。In order to study the influence of complicated geological conditions on frequency dispersion curves of Rayleigh surface wave, the paper, using finite difference seismic numeric modeling, carried out forward modeling on three models, obtained wave field snapshot and single shot record at certain time. Analysis of frequency dispersion of modeled record showed that there was no frequency dispersion in single layer homogeneous medium, phase velocity of frequency dispersion curves in double layer homogeneous media on relief surface was only related to the parameters of media themselves, and was not influenced by topography, in media with interbedded soft layer in flat surface, frequency dispersion of Rayleigh wave was very evident.

关 键 词：瑞雷波 有限差分 正演模拟 交错网格 频散特性 波动方程 

分 类 号：P631.4[天文地球—地质矿产勘探]