海底大地电磁信号采集的技术难点

海底大地电磁探测要解决的首要问题是海底信号采集。对于陆上已广泛使用且采集技术已较为成熟的大地电磁测深法来说 ,该方法在海洋中的应用并不是一个简单的方法移植问题。由于海洋环境的严酷、海上作业的风险和海底信号微弱 ,要实现海底大地电磁信号采集面临着重重困难。为实现预期的探测目标 ,需采用一系列高新技术 ,包括微弱信号检测技术、海底多台观测系统的高精度同步技术、智能化控制技术、水下密封承压技术以及硬件系统集成技术等等。对海底大地电磁探测所遇到的难点技术问题作了初步的探讨

Difficulties in the marine magnetotelluric signal acquisition

The main problem of marine magnetotelluric prospecting is the acquisition of marine sea bottom signal. Although the magnetotelluric method applied to the land is mature, the application to the seabed is not a simple transplant of the methods. There are many difficulties in the marine magnetotelluric prospecting due to the cruel environment in the sea, the danger of working on the sea and the faint signal from the seabed. In order to realize the acquisition, a series of high and new technologies should be applied, including the acquisition of faint signal, the high accuracy synchronization technique of many prospecting systems, the intelligent control technique, the technique of squeeze-bearing under the water and the integration of the hardware systems and so on. In this article, the difficulties that we came cross during the prospecting are discussed preli-minarily. The research should be gone into and consummated because the marine magnetotelluric prospecting is applied in China for the first time.