关键词: 三参数同步反演方法, 协方差矩阵, 贝叶斯参数估计理论, 岩石物理约束, 仿真实验

Abstract:

The prestack three-term simultaneous inversion method can be used to simultaneously acquire the information of P-wave impedance, S-wave impedance and density to quantify fluid saturation of reservoir.A new prestack three-term simultaneous inversion method was developed on the linearized approximation of the Zoeppritz equation and Bayesian parameter estimation theory. The covariance matrix was used to describe the degree of the correlation between parameters. The petrophysical relations of parameters were used to constrain the inversion results. The more steady, accurate and reliable solutions were obtained. The simulation test and practical application of this method show that all inverted parameters are almost perfectly retrieved for reservoir description.

Key words: three-term simultaneous inversion method, covariance matrix, Bayesian parameter estimation theory, petrophysical constraint, simulation test