构造应力场三维数值模拟的有限单元法  

Finite Element Method of 3-D Numerical Simulation on Tectonic Stress Field

作　　者：田宜平[1] 刘雄[1] 李星[2] 魏民[3] 

机构地区：[1]中国地质大学计算机学院,湖北武汉430074 [2]中国地质大学数理学院,湖北武汉430074 [3]中国地质大学资源学院,湖北武汉430074

出　　处：《地球科学（中国地质大学学报）》2011年第2期375-380,共6页Earth Science-Journal of China University of Geosciences

基　　金：国家科技重大专项"大型油气田及煤层气开发"(No.2008ZX05051)

摘　　要：目前构造应力场的研究主要是基于平面的二维分析,随着油气成藏过程三维模拟的发展,应力场的三维数值模拟显得越来越重要.从三维空间角度出发,分析了应力场的有限元模拟与求解的整个过程.基于不规则六面体单元的角点网格数据模型,对有限元求解法进行了分析与研究并提出计算方法.基于不规则角点网格数据模型的三维构造应力场有限元计算方法是本文的创新点.最后用上述方法对东营凹陷的牛庄-王家岗区域三维应力场进行了实际模拟计算,计算结果相比于其他数据模型更符合实际情况.Analysis of the tectonic stress field plays an important role in petroleum accumulation dynamics simulation.The current study on stress field is mainly focused on two-dimensional analysis of plane.With development of the three-dimensional simulation of petroleum forming process,three-dimensional numerical simulation of stress field becomes increasingly important.In this paper,the finite element simulation of stress field and solution of the whole process,based on three-dimensional space,are discussed.After analysis and study of finite element method,the calculation method,based on irregular hexahedral element described by the corner-point grid data model,is put forward in the paper.The three-dimensional finite element method of tectonic stress field,based on irregular corner-point grid data model,is the innovation of this paper.Finally,the above method is used in actual three-dimensional stress field simulation calculation in Dongying depression-Niuzhuang Wangjiagang region.The results,compared to other data models,are more realistic.

关 键 词：构造应力场 三维数值模拟 有限元 数学模型 

分 类 号：P628[天文地球—地质矿产勘探]