Time-frequency electromagnetic(TFEM) method: Data acquisition design
HE Zhanxiang1,2, YANG Guoshi3, CHEN Siqi4, ZHAO Guo3, LIU Zihao3, GUO Rongwen4
1. Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China;
2. Department of Earth and Space Sciences, Sou-thern University of Science and Technology, Shen-zhen, Guangdong 518055, China;
3. GME & Geochemical Surveys, BGP Inc., CNPC, Zhuozhou, Hebei 072751, China;
4. School of Geosciences and Info-Physics, Central South University, Changsha, Hunan 410083, China
Abstract：The time-frequency electromagnetic(TFEM) method is a controlled source electromagnetic method developed for oil and gas exploration,which can detect deeply-buried targets.Based on a real geoelectric model and the noise analysis in the Area Q,the characteristics of electromagnetic anomalies caused by geological targets are analyzed by 3D modeling,and the acquisition design is comprehensively studied.A receiving system design with equal-waist trapezoidal region electrode distribution and receiving signal balance and a transmitting system optimal design for target anomaly contrast analysis are proposed.At the same time,based on the single-noise analysis of the stacking times,an excitation design method for excitation period setting and stacking time is also proposed.
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