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全波形反演同时利用地震波的振幅和相位信息,基于最小二乘思想反演介质参数,具有高分辨率、高精度等优点.但是,在地震数据的处理过程中运用全波形反演的运算成本非常高.为了解决这个问题,本文通过线性时移函数将多个炮记录压缩为若干个平面波记录,实现了一种基于平面波编码的时间域多尺度全波形反演方法.通过对Marmousi模型的反演测试以及与常规全波形反演对比分析,验证了本文方法的较高的运算效率和较强的抗噪声能力.
The full waveform inversion has the advantages of high resolution and high accuracy by using the amplitude and phase information of the seismic wave simultaneously and retrieving the medium parameters based on the least square method, however, the operation cost of the full waveform inversion is used in the process of seismic data processing Very high.In order to solve this problem, this paper realizes a time-domain multi-scale full waveform inversion method based on plane wave coding by compressing multiple shots into several plane wave records by linear time-shift function.Through the analysis of the anti-error of the Marmousi model The performance test and comparison with the conventional full waveform inversion show that the proposed method has high computational efficiency and strong anti-noise ability.