利用S_H横波反射资料中的勒夫面波反演浅部横波速度结构

Inversion of the Love Wave in the S_H Wave Reflection Seismic Data for the Shallow S_H-Wave Velocity Structure

由于勒夫波速度与纵波速度无关,勒夫波多道分析方法具有频散曲线简单、能量清晰、反演过程中未知参数少、对初始模型依赖小、反演结果稳定、分辨率高等特点。实验结果表明,利用浅层S_H横波反射地震数据中的勒夫面波信息,反演得到近地表横波速度结构,在浅层地质构造、断层位置、上断点埋深等方面与浅层SH横波反射地震剖面以及地质钻孔数据吻合较好。该方法可为地下构造解释提供更多依据,提高探测成果的可靠性。

Due to the velocity of Love wave is independent of the P wave velocity,the multi-channel analysis of Love wave method has the characteristics of simple dispersion curves,clear energy,less unknown parameters in inversion process,less dependency on the initial model,stable inversion results and high resolution.The results shows that,the near-surface SHwave velocity structure can be obtained by inversion of the love wave in the SH wave reflection seismic data,and the shallow geological structure,fault location and the depth of the breakpoint of the near-surface SHwave velocity structure are in good agreement with the SH wave reflection seismic profile and the drilling data.This technique will provide more explanation for the underground structure basis,and improve the reliability of detection results.