超低频极低频海底电磁探测基础研究

项目名称： 超低频极低频海底电磁探测基础研究

项目编号： No.61271086

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 李凯

作者单位： 浙江大学

项目金额： 80万元

中文摘要： 未来很长时间，开发海底大陆架及深海海底油气资源将是保证我国能源安全供应的重要战略举措之一，也是本项目研究的需求背景。本项目针以海底可控源电磁勘探相关的超低频（SLF：300Hz-30Hz）和极低频（ELF：30Hz以下）波传播为研究对象，研究SLF/ELF波在分层地层或岩层、海水、"地-各向异性电离层波导"和各向异性电离层等不同媒质中的传播机理。主要研究内容包括：研究分层媒质中SLF/ELF水平线天线激励的近区场的频域解和时域解；研究地面SLF/ELF水平线天线在"地-各向异性电离层波导"及海底激励的场；研究SLF/ELF波多模干涉现象及相位稳定性分析。通过深入研究位于海底或者地面上可控源激励的SLF/ELF波在电离层、地-各向异性电离层波导、海水以及海底岩层等区域传播规律的研究，为电磁勘探在我国海洋领域的全面发展打下坚实的基础。

中文关键词： 超低频；极低频；地–各向异性电离层波导；可控源海洋电磁勘探；近区场

英文摘要： In future, the exploration and development of oil and gas resources in deep seabed and undersea continental shelf are important strategic measure to ensure the energy security of China, which are also the required background of this project. We will be interested mainly in the propgation of SLF/ELF (SLF: 300Hz-30Hz; ELF: below 30Hz) electromagnetic wave concerning with the seabed CSEM exploration. In particular, we will attempt to investigate the mechanism of SLF/ELF wave propagation in different regions, such as layered strata or rock, sea, anisotropic Earth-ionosphere waveguide, and anisotropic ionosphere. The research contents include the following respects: the solutions in frequency domain and time domain for the near-field radiated by SLF/ELF horizontal antennas located on the ground; the full-wave solutions for the electromagnetic field in anisotropic earth-ionosphere waveguide or the seabed surface radiated by a horizontal antennas on or near the ground; the analysis on SLF/ELF multimode interference and phas stability. Through the study above-mentioned, the achievements of this project will lay a solid foundation for the marine electromagnetic exploration in China.

英文关键词： Super low frequency；extremely low frequency；anisotropic Earth-ionospheric waveguide；marine control-source electromagnetics method；near-zone field