【作者】 张厚柱；

【导师】 徐秉业； 杨慧珠；

【作者基本信息】 清华大学 ， 固体力学， 1996， 博士

【摘要】 综合储层物性参数反演是地球物理勘探界具有重大实际意义的课题。本文建立了物性参数反演的综合反演体系并讨论了应用中的有关问题。 首先,本文建立了子波反演和波阻抗反演的理论,提出了最小绝对值准则优化问题的迭代加权共轭梯度算法。此准则较最小平方准则可以更好地消除噪音及大误差数据的不良影响。 本文建立了测井反演和岩性反演的理论和算法,指出了综合应用多种测井资料在消除反演结果的偶然性方面的重要性,并视速度和密度为二个独立的参数,采用可将地震解释、测井资料有效结合起来的多约束复形调优法作为岩性反演最优化问题的求解方法。 最后利用两个实例讨论了算法的精度和分辨能力,得出了工程人员易于接受和具有直观性的各种岩性参数。更多还原

【Abstract】 The inversion of reservoir parameters constrained by logging materials is a very important research topic not only in Geophysics but also in Geophysical Prospecting. The theory and algorithm presented here point out problems that are often met in practical use.On the basis of optimization methods, theory of wavelet and wave impedance inversion is set up. A new algorithm — Iterative Reweighted Conjugate Gradient Method which can eliminate the influence of outlier and noise is given here.The bridges between wave impedance inversion and real seismic data processing are founded by logging inversion and lithological parameter inversion. Velocity and density are assumed as two independent parameters. We select the Method of Optimum Adjustment In Complex Shape which can combine geological interpretation with logging materials and human’s experience so that the results may be easily controlled.Two examples from seismic prospecting are given in order to test the effect, accuracy and resolving power of the algorithm.更多还原