Marine Circular Electric Dipole (MCED): A new innovative electromagnetic technique for the exploration of submarine groundwater resources

海洋圆形电偶极子（MCED）：一种用于海底地下水资源勘探的创新电磁技术

基本信息

批准号：
245337298
负责人：
Professor Dr. Bülent Tezkan
金额：
--
依托单位：
Arbeitsgruppe Angewandte Geophysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/245337298?language=en
关键词：
Marine Circular Electric Dipole MCED

项目摘要

Recent marine electromagnetic measurements yielded the delineation of a 30 km long and at least 3 km wide fresh groundwater body within the deep-seated sub-seafloor aquifer offshore the southern coastal plain of Israel. The results allowed an estimation of unexploited fresh groundwater. However, due to the low resolution of the applied geophysical methods, the results turned out insufficient in order to fully understand the hydrogeological configuration and mechanism controlling the occurrence of this discovery. Especially the lateral geometry of the freshwater body, important for the hydrogeological modeling, could not be resolved. Without such an understanding, a rational management of this unexploited groundwater reservoir is impossible.The proposed project aims at answering the hydrogeological boundary conditions of the fresh groundwater body by implementing for the first time worldwide a high-resolution electromagnetic method based on the application of a Circular Electric Dipole (CED) in the marine environment regarding groundwater studies. In addition to the development of the transmitter antenna, the development of an interpretation scheme (e.g. 1D inversion and 2D/3D forward modeling) for this novel electromagnetic technique will be the main focus of the project. Based on the results of the geophysical study, a management scheme for future usage of this groundwater resource can be developed.The research will result in an increased potential of fresh groundwater resources in Israel and in the development of a new high-resolution marine electromagnetic technology, which can be applied worldwide not only for submarine groundwater but also for hydrocarbon and gas-hydrate exploration. Theoretical model studies with synthetic data have shown that the MCED technique has a better lateral resolution of the resistive groundwater layer compared to the conventional marine Long Offset Electromagnetic (LOTEM) technique using the inline/broadside configuration

最近的海洋电磁测量在以色列南部沿海平原近海的深层海底含水层内描绘出了一个长 30 公里、宽至少 3 公里的淡水地下水体。结果可以对未开发的地下水进行估计。然而，由于所应用的地球物理方法的分辨率较低，结果不足以充分了解控制这一发现发生的水文地质构造和机制。特别是对于水文地质建模很重要的淡水体的横向几何形状无法解决。如果没有这样的认识，就不可能对这个未开发的地下水库进行合理管理。该项目旨在通过在全球范围内首次实施基于应用的高分辨率电磁方法来回答淡水地下水体的水文地质边界条件。与地下水研究有关的海洋环境中的圆形电偶极子（CED）。除了发射机天线的开发之外，为这种新型电磁技术开发解释方案（例如 1D 反演和 2D/3D 正向建模）将是该项目的主要重点。根据地球物理研究的结果，可以制定该地下水资源未来使用的管理方案。该研究将增加以色列淡水地下水资源的潜力，并开发新的高分辨率海洋电磁技术，不仅可以在全球范围内应用于海底地下水，还可以用于碳氢化合物和天然气水合物勘探。使用合成数据的理论模型研究表明，与使用内嵌/宽边配置的传统海洋长偏移电磁 (LOTEM) 技术相比，MCED 技术对电阻性地下水层具有更好的横向分辨率