地球物理反演的Monte Carlo解法

A MONTE CARLO SOLUTION IN GEOPHYSICAL INVERSION

大连理工大学,大连116023

Dalian University of Science and Engineering, Danlian 116023

本文研究地球物理反演的Monte Carlo解法.文中引入马尔可夫地层沉积模型,改进随机搜索点的产生方法.提出兼用地质知识和地震记录对搜索点进行检验的新方法,有效地提高了Monte Carlo反演方法的计算效率.本文的反演方法除了由约束条件引入确定性地质知识外,还通过马尔可夫沉积模型引入了不确定性地质知识,为地质学与地球物理反演的进一步结合开辟了新途径.

This paper studies the Monte Carlo solution in geophysical inversion and proposes to simulate earth's sedimentation model with Markov Chain to improve the procedure for generating radom searching points and to incorporate both geological knowledge and seismic information to verify the searching points. In this way, the calculating efficiency of the Monte Carlo inversion is apparently improved. The distiguishing feature of the inversion method proposed here lies in that the deterministic geologic knowledge is incorporated in constraint conditions and the undetcrministic geologic knowledge is introduced via the design of sedimentation models. Those give rise to a new way in the corporation of geological and geophysical information for parameter inversion.