瑞利波波形反演的发展现状及展望

Development status and prospect of Rayleigh waveform inversion

常规多道面波分析技术反演过程需要计算基于水平层状介质假设基础上的理论频散曲线,从而导致该方法的水平分辨率无法满足横向不均匀复杂介质的要求。而目前已成为人们研究热点的全波形反演技术,其反演过程基于波动方程求解,对瑞利波而言,无需根据频散方程计算频散曲线,理论上克服了常规多道面波分析技术横向分辨能力的"先天不足"。因此,瑞利波波形反演是瑞利波勘探领域中一个重要的发展方向。论文回顾了全波形反演的发展历史,剖析了瑞利波波形反演的发展现状及存在问题,指出了瑞利波波形反演需要进一步研究的问题和发展趋势,为瑞利波波形反演研究提供了一定的研究思路。

The theoretical dispersion curves based on the assumption of horizontal layered-elastic media is needed to be calculated in the inversion for the conventional multichannel analysis technique of surface waves(MASW).As a result,the horizontal resolution of this method can not meet the requirements of the lateral inhomogeneous complex media.At present,fullwaveform inversion technology has become a research hotspot,whose inversion process is based on the solution of wave equation.For Rayleigh waveform inversion,it is unnecessary to calculate the dispersion curves according to the dispersion equation.In theory,it overcomes the'inborn deficiency'of the conventional MASW method in the lateral resolution ability.Therefore,Rayleigh waveform inversion is an important development direction in Rayleigh wave exploration field.The development history of full waveform inversion is fully reviewed in this paper.And the development status and the existing problems in Rayleigh wave inversion are also analyzed.Furthermore,the problems needed to be studied further and the development trends of Rayleigh wave inversion are pointed out.It provides some research ideas for the study of Rayleigh waveform inversion.The research achievement s have certain reference significance.