一种同时反演纵波速度和泊松比的方法

本文提出一种角度部分叠加资料同时反演纵波速度和泊松比的方法.以角度部分叠加资料为基础，利用地震波振幅随入射角变化与弹性参数间的数学关系，基于非线性最优化理论，通过将最小平方问题转化为大型带状矩阵的求解问题，采用测井约束逐道外推技术依次求得该角度剖面每个点的纵波和泊松比值.通过由每个角度叠加剖面反演得到的相应角度范围的纵波速度和泊松比剖面的对比分析，进一步得到地震波垂直入射时的纵波速度和泊松比，为地震资料的岩性及含气性解释提供丰富的参数信息.

A P wave velocity and poisson ratio nonlinear inversion method

The method put forward in the paper is partial stack P-wave velocity and poisson ratio inversion simultaneously, using the mathematics relationship between the seismic wave amplitude versus incidence angle and elastic parameters, basing on the theory of nonlinear optimization, through converting the minimum square problem into the problem of large band matrix solution. Through analyzing the P-wave velocity and poisson ratio velumes inverted from every partial stack, P-wave velocity and poisson ratio at normal incidance can be obtained. So parameters ase available for lithologic interpretation and oil-gas bearing analysis.