| 利用多分量地震数据反演近地表横波速度 |
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| 引用本文： | 李晓明,陈双全,李向阳.利用多分量地震数据反演近地表横波速度[J].石油地球物理勘探,2012(4):532-536,682,511. |
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| 作者姓名： | 李晓明 陈双全 李向阳 |
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| 作者单位： | 中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学(北京)CNPC物探重点实验室;Edinburgh Anisotropy Project,British Geophysical Survey,Edinburgh,UK |
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| 基金项目： | 国家自然科学基金项目(No.41074080);国家科技重大专项(2011ZX05019-008)资助 |
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| 摘 要： | 在陆上多波地震资料处理中,转换波资料静校正需要获得准确的近地表横波速度。文中从分析多分量地震记录波场出发,提出利用多波资料中的X与Z分量数据进行近地表横波速度反演的方法。利用X、Z分量上折射波信息,获取水平慢度和偏振角度,进而反演近地表的横波速度。通过数学模型与实际资料的应用,表明反演的近地表横波速度较为准确,可以准确地反映近地表的横波速度变化。
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| 关 键 词： | 近地表 横波速度 偏振分析 折射波 多分量 反演 |
An inversion method for near-surface shear-wave velocity using multi-component seismic data |
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| Li Xiaoming,Chen Shuangquan,and Li Xiang-yang.An inversion method for near-surface shear-wave velocity using multi-component seismic data[J].Oil Geophysical Prospecting,2012(4):532-536,682,511. |
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| Authors: | Li Xiaoming Chen Shuangquan and Li Xiang-yang |
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| Affiliation: | 2,3 1.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China2.CNPC Key Laboratory of Geophysical Prospecting,China University of Petroleum(Beijing),Beijing 102249,China3.Edinburgh Anisotropy Project,British Geophysical Survey,Edinburgh,U.K. |
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| Abstract: | In land multi-component seismic data processing,the accurate near-surface shear-wave velocity is needed in converted-wave static correction.In this paper,we propose a method in which the near-surface shear-wave velocity can be inverted by X and Z component data after analyzing the wave field of multi-component seismic record.Horizontal slowness and polarization angle can be derived using refracted wave information in X and Z component,and then the shear-wave velocity can be inverted.The method is tested on model data and real data.The results show the inverted near-surface shear-wave velocity is reliable,and can be used to characterize exactly the near-surface strata. |
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| Keywords: | near surface shear-wave velocity polarization analysis refracted wave multi-component inversion |
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