含多次波数据的奇性反演

Singular inversion of multiple-bearing data.

本文探讨了利用逆散射序列对含有多次波信息的地震数据进行奇性界面反演的可能性。由于 Born近似奇性反演算法仅利用了逆散射序列的线性项 ,因此只能适用于小扰动量介质的反演。文中利用格林函数理论 ,分析了逆散射序列的物理意义 ,指出逆散射序列描述了在散射区域内波与散射点作用后 ,在参考介质中传播到接收点的波动过程。对含多次波信息的 6层地震模型 (含 5个反射界面 )数据的奇性反演结果表明 ,文中方法可以有效地反演界面的位置 ,不仅适用于小扰动量介质的反演 ,对于大扰动量介质同样适用。

The paper discussed the capability using inverse scattering sequence to implement singular interface inversion of seismic data involving multiple information.Since Born-approximate singular inversive algorithm only uses the linear item of inverse scattering sequence,that adapts itself only to the inversion of the medium having small disturbance.Using Green function theory,the paper analyzed the physical meaning of inverse scattering sequence,pointed out the wave process of inverse scattering sequence propagating to receiver points in reference medium after describing wave action on scattering points in scattering region.The results of singular inversion of multiple-bearing seismic model containing 6 layers (involving 5 reflectors) showed that the method in the paper can effectively make inversion of the position of interfaces,not only adapted to the medium having small disturbance but also adapted to the medium having large disturbance.