可控源音频大地电磁法资料处理毕业论文.doc

摘  要
根据可控源音频大地电磁法（CSAMT）的原理和方法，对观测数据进行平滑、极化视电阻率的识别、静态校正、空间滤波等处理，取得可靠的张量阻抗要素、视电阻率、相位及其他有关的大地电磁响应函数，供资料解释使用。并对可控源音频大地电磁法的用处及其国内外发展现状进行了分析，对可控源音频大地电磁法资料处理的步骤以及可控源音频大地电磁法,山下非远场改正法进行了的简单的论述，重点对可控源音频大地电磁法静态校正的方法和原理进行阐述。在处理实例的过程中，利用MTSoft2d 软件，对实测数据进行编辑平滑、曲线拟合、静态校正等预处理和定量反演解释，利用surfer软件对反演结果进行成图，并作出资料解释。

关键词： CSAMT；视电阻率；静态校正；MTSoft2d。

Processing Data by the Application of Controlled Source Audio-frequency Magnetotellurics Sounding

Abstract: Based on the methods and theories of CASMT, the author has acquired reliable tensor impedance elements, apparent resistivity, phase and other relevant Mt response functions for this thesis writing trough a comprehensive analyzing and smooth processing of the data that has been collected, plus recognition of the polarization apparent resistivity, static correction and spatial filtering. Furthermore, this paper analyzes the application and development of CASMT both domestic and abroad, and briefly discusses the CSAMT and near field method. This article also makes an elaborate explanation of smooth processing of the data, recognition of the polarization apparent resistivity, static correction and spatial filtering. The author also does a lot of work on data processing and furthermore inversion analysis by the use of MTSoft2d, and mapping the outcome with the help of Surfer. And finally makes a relevant geological interpretation.

Key words: CSAMT; apparent resistivity; static correction; MTSoft2d.

目录

可控源音频大地电磁法资料处理 i
摘  要 i
Abstract ii
第一章 前言 1
1.1 论文研究目的和意义 1
1.2 国内外研究发展现状 1
1.3 论文研究内容和思路 3
第二章 CSAMT方法原理 4
2.1 可控源音频大地电磁法（CSAMT） 4
2.2 CSAMT法的采集系统 5
第三章 CSAMT资料处理 8
3.1 数据平滑 8
3.2 CSAMT静态效应校正 9
3.3 CSAMT山下非远场改正法 20
第四章 应用实例 22
4.1 利用MTsoft2D软件处理数据 22
4.2 预处理前后对比 32
4.3 surfer成图及资料解释 36
结  论 38
致  谢 39
参考文献 40