基于小波分析的瑞雷波频散曲线提取研究

Study of Rayleigh Wave Dispersion Curve Extraction Based on Wavelet Analysis

频散曲线的求取是瑞雷波勘探的基础性工作。为了能够从实测瑞雷波地震记录中准确提取出频散曲线,基于小波分析的多分辨率分析的特点,将小波变换应用到频散曲线的提取研究中。介绍了基于小波分析的频散曲线提取的计算过程和基于Matlab软件的离散数据处理方法,用实例证明了小波分析能够应用于瑞雷波频散曲线的提取,且存在提纯性能好、可靠性高、深部探测精度高等优点。针对母小波选择、计算过程集成化等问题,提出了下一步的研究方向。

Calculating the dispersion curve is the basic research of Rayleigh wave exploration. In order to extract the dispersion curve from the measured Rayleigh wave seismic records accurately, wavelet transform is applied to study the dispersion curve extraction because of its multi-resolution character. It introduces the calculation process of dispersion curve extraction based on wavelet analysis and the processing method of discrete data based on matlab. A practical example is used to prove that the wavelet analysis can be applied to Rayleigh wave dispersion curve extraction, with the advantages of good purification performance, high reliability, high deep detection precision and so on. On the issues of the mother wavelet selection and calculation integration, it also proposes the further research direction.