基于随机介质模型的近地表波场模拟及分析  

Near-surface wave field simulation and analysis based on random media models

作　　者：肖云飞[1] 殷厚成[1] 孙成禹[2] 陈林[1] 常鉴[1] 徐国庆[1] 彭代平[1] 

机构地区：[1]中国石油化工股份有限公司石油物探技术研究院,江苏南京210014 [2]中国石油大学(华东)地球资源与信息学院,山东青岛266555

出　　处：《石油物探》2011年第4期336-344,23,共9页Geophysical Prospecting For Petroleum

摘　　要：为了更好地研究野外实际近地表波场特征,特别是瑞雷面波的波场特征,根据弹性波方程,采用交错网格有限差分算法对基于随机介质模型的近地表波场进行了模拟和分析。通过半空间随机介质模型的模拟,分析了瑞雷面波能量在水平和垂直传播方向上的衰减情况以及震源埋深对面波能量的影响;利用层状随机介质模型的模拟,分析了不同随机介质自相关长度对近地表波场的影响。In order to give a better research on the near-surface wave characteristics in the field(focusing on Rayleigh wave),on the basis of random media model establishment,in terms of elastic wave equation,we applied straggered grid finite difference algorithm to simulate and analyze the near-surface wave field of random media model.By simulating semi-space random media model,the energy attenuation of Rayleigh wave in horizontal and vertical directions was analyzed,and the impact of source depth on Rayleigh wave energy was studied.By simulating layered random media model,the impact of different self-coherent length on near-surface wave field was analyzed.

关 键 词：近地表 随机介质模型 交错网格 瑞雷面波 震源埋深 

分 类 号：P631.4[天文地球—地质矿产勘探]