海洋发射电极的阻抗特性理论分析与实验研究

项目名称： 海洋发射电极的阻抗特性理论分析与实验研究

项目编号： No.41504138

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 天文学、地球科学

项目作者： 王猛

作者单位： 中国地质大学（北京）

项目金额： 22万元

中文摘要： 解决海洋可控源电磁法（MCSEM）发展过程中的基础理论问题，对我国海域天然气水合物和油气资源的勘探有着重要的意义。在进行MCSEM勘探时，一般通过减小发射电极极间电阻的方式来增大人工源电磁场的激励能力，进而提高信噪比。而极间电阻的阻抗特性究竟与哪些影响因素有关，各个因素占据多少权重，正确的极间电阻计算公式又将是什么？这个前沿性的关键问题如果不解决，将影响整个系统的设计。本项目正是立足基础理论，对极间电阻的阻抗特性和众多影响因素展开深入分析，力争从基础理论推导得到严谨的计算结果，根据理论结果，指导室内外的模拟实验。另外提出新的模拟准则，探讨利用大小水槽模拟海洋环境的对应关系和规律。结合水槽、海边和海洋实验，验证理论推导和实验结果。最终得到清晰明了的数学表达式。极间电阻求取问题的解决，将会为我国MCSEM的发展提供积极的理论支撑。

中文关键词： 海洋可控源电磁；发射电极；极间电阻；阻抗特性；理论分析

英文摘要： There is a great importance to solve the fundamental problems in the development progress of Marine controlled-source electromagnetic methods (MCSEM) for the exploration of oil and gas resources. During the MCSEM survey, the way to increase the transmission dipole source moment is to minus the resistance between electrodes. How many influence factors related to the resistance? What are the weights of these factors? What is the correct expression of the resistance? The design of the transmission system is influenced greatly by these questions. In this proposal, we try to execute the derivation of the formula from the basic theories and analysis these influence factors to get the rigorous results. We also should find the relationship between the flume and the ocean to get the new simulation guidelines for the experiment. And we will validate the theoretical derivation and experimental results by carrying out the marine experiments. The clear mathematical expressions of the resistance between the electrodes will provide the support for the MCSEM development in China.

英文关键词： MCSEM;transmission electrodes;electrode resistance;impedance characteristics;theoretical analysis