Time-frequency electromagnetic(TFEM) method: Data acquisition system and its application
HE Zhanxiang1,2,3, CHEN Zhongchang1,3, REN Wenjing4, PANG Hengchang4, TIAN Zhiquan4, SHEN Yibin1
1. SUSTech Academy for Advanced Interdisciplinary Studies, Shenzhen, Guangdong 518055, China; 2. Southern Marine Science and Engineering Guangdong Laboratory, Shenzhen, Guangdong 511458, China; 3. Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology, Department of Earth and Spaces Science, SUSTech, Shenzhen, Guangdong 518055, China; 4. GME & Geochemical Surveys of BGP, CNPC, Zhuozhou, Hebei 072751, China
Abstract：A high-power electromagnetic instrument system is the foundation of deep mineral resource exploration. It is of great significance to develop high-power and high-precision electromagnetic instruments. The time-frequency electromagnetic (TFEM) exploration instrument system based on deep oil and gas exploration demand can realize electromagnetic integration exploration in the time domain and frequency domain simultaneously. The simulation results show that the technical indexes of the system can meet the requirements of integrated exploration of time domain and frequency domain, electric method and magnetic method, and can also realize data acquisition in near and far regions. This time-frequency electromagnetic instrument system independently developed by BGP includes high-power constant-current electromagnetic transmitter and distributed/nodal multi-type electromagnetic signal receiver. The dynamic range of the receiver is greater than 120dB, and the frequency range of the received signal is 0.001-500Hz.The data acquisition experiment proves that its technical index reaches the international level of similar instruments, which can provide strong support for China's deep resource exploration.
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