基于ModEM的大地电磁三维反演可视化工具包开发及应用

发布时间：2018-03-10 20:32

本文选题：大地电磁　切入点：三维反演　出处：《东华理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着计算机软硬件水平的提高与三维反演理论的不断发展,大地电磁三维反演算法的实用化研究已成为研究热点。ModEM是一套应用于一系列电磁地球物理数据集三维反演的并行模块化反演系统,但该系统缺少配套的辅助工具包而不利于用户使用。据此,本文开展基于ModEM的大地电磁三维反演可视化工具包开发及其应用的研究。本文首先介绍三维NLCG反演方法的基本原理,并对基于三维NLCG反演算法的模块化三维反演并行软件ModEM基本原理及组织架构作了阐述,ModEM由通用反演层、接口层、数值计算层等三个层级组成,主要实现大地电磁数据集三维反演功能。然后采用Python语言编写与ModEM软件配套的工具包程序,包含数据分析模块、输入文件模块、结果成图模块等三个功能模块,实现了显示测点位置分布图,响应参数成图,拟合误差分析,生成ModEM所需的输入文件(数据文件、初始模型文件、控制文件、协方差文件),以及对反演结果多种形式可视化成图与保存功能,并对参数设置与文件格式进行说明及给出相应示例。最后利用自开发的ModEM工具包结合ModEM反演软件对江西省圳头地热田音频大地电磁测深数据进行三维反演,揭示了区域内地热资源赋存状态及不同方向断裂的交互关系,并对区域地热资源初步评价,验证了ModEM工具包的可靠性与实用性。
[Abstract]:With the continuous development of computer hardware and software level and 3D inversion theory, practical research on three dimensional magnetotelluric inversion algorithm has become a hot research topic in.ModEM is a set of parallel modular inversion system is applied to a series of electromagnetic geophysical data in 3D inversion, but the lack of aid kit facilities and is not conducive to the user. Therefore, the research on the development and application of visualization package with three dimensional magnetotelluric inversion based on ModEM. This paper introduced the principle of 3D NLCG inversion, and inversion algorithm of 3D NLCG based modular parallel 3D inversion software ModEM basic principle and structure are described by the general ModEM, inversion layer, interface layer the numerical calculation, the three level layer etc., mainly for the magnetotelluric data set. Then the 3D inversion function written with ModE Python language M software toolkit program, including data analysis module, input module, the three function module chart module, realizes measuring point distribution, response parameter mapping, error analysis, input file generation required by ModEM (data files, initial model files, control files, file covariance), as well as on the inversion results various forms of visual mapping and preservation of function, and gives the corresponding explanation and examples of settings and file format parameters. Finally using the self developed ModEM toolkit for 3D inversion of Jiangxi province zuntou geothermal field audio magnetotelluric data with ModEM inversion software, reveals the interactive relationship between the occurrence of geothermal resources the region and different direction of fracture, and the regional geothermal resources evaluation, to verify the reliability and practicability of the ModEM toolkit.

【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P631.325

【相似文献】