从单一pp波数据中提取出来的弹性参数与岩性以及孔隙内流体之间的联系是不充分的,这就造成了在油藏的解释中包含有大量的不确定性.通过加入PS波数据信息,可以有效降低反演的多解性,提高反演的稳定性.笔者所研究的反演方法是基于精确的Zoeppritz方程,利用广义线性反演方法,通过迭代的思想来反演出纵波速度、横波速度和密度.该方法相对单一pp反演可以有效提高横波速度的估计精度.%The elastic parameters inverted from PP-wave data couldnt reflect the variation of the lithology and the fluid in pore adequately , which results in large uncertainty in the interpretation of oil reservoir. If the information of PS-wave data is added as the constraint, the interpretation ambiguity could be reduced effectively and the stability of inversion could be improved considerably. The method of the joint inversion presented in this paper uses the theory of GLI (generalized linear inversion) to invert P-wave velocity, S-wave velocity and density iteratively based on the exact Zoeppritz equation. And the precision of S-wave velocity inverted from the joint inversion is improved largely compared with that of inversion by only using PP-wave data.
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