1. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249;
2. 中国石油大学(北京)CNPC物探重点实验室, 北京 102249;
3. Edinburgh Anisotropy Project, British Ueophysical Survey, Edinburgh, U K
An inversion method for near-surface shear-wave velocity using multi-component seismic data
Li Xiaoming1.2, Chen Shuangquan1,2, Li Xiang-yang2,3
1. State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;
2. CNPC Key Laboratory of Geophysical Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;
3. Edinburgh Anisotropy Project,British Geophysical Survey,Edinburgh,U.K
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.