高精度有限差分瑞雷面波模拟及频散特征提取  

High precision finite difference Rayleigh wave simulation and frequency dispersion characteristics extraction

作　　者：秦臻[1] 张才[1] 郑晓东[1] 徐基祥[1] 宋建勇[2] 宋雪娟[1] 

机构地区：[1]中国石油勘探开发研究院物探所,北京100083 [2]中国石油大学资源与信息学院,北京102249

出　　处：《石油地球物理勘探》2010年第1期40-46,共7页Oil Geophysical Prospecting

基　　金：前陆盆地油气成藏规律;关键技术及目标评价(项目编号:2008ZX05003)项目资助

摘　　要：瑞雷面波频散特征与地下介质特性有着密切的联系。利用瑞雷面波频散特征可反演浅层的地质结构。本文使用了灵活的高阶有限差分算子、合理的自由地表边界条件和高效的SPML吸收边界条件,获得了高精度的瑞雷面波正演记录。在此基础上将数值模拟提取的频散特征与理论的频散特征进行对比,两者非常吻合,验证了瑞雷面波有限差分模拟的精度很高,可用来深入研究复杂情形下瑞雷面波的频散特征。The frequency dispersion characteristics of the Rayleigh wave are much related to characteristics of subsurface media.The frequency dispersion characteristics of the Rayleigh wave can be used to invert the shallow geological structures.In this paper the flexible high order finite difference operator,the reasonable surface boundary conditions and the efficient SPML absorption conditions were utilized so that the high precision Rayleigh wave forward modeling records were obtained,based on the records the frequency dispersion characteristics extracted from modeling and the theoretical frequency dispersion characteristics were correlated,it can be seen that they match very well.The results proved that the Rayleigh wave finite difference modeling has high precision and the modeling method can be utilized to study the frequency dispersion characteristics of the Rayleigh wave in complex situation.

关 键 词：高精度有限差分 瑞雷面波 频散特征 特征提取 数值模拟 吸收边界条件 有限差分算子 有限差分模拟 

分 类 号：P631.4[天文地球—地质矿产勘探]