Time-frequency electromagnetic (TFEM) technology: Data processing
HE Zhanxiang1,2,3, DONG Weibin4, ZHAO Guo4, HOU Yujian1, SHEN Yibin1,3, LIU Xuejun4
1. Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; 2. Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou), Guangzhou, Guangdong 511458, China; 3. Department of Earth and Space Sciences SUSTech, Shenzhen, Guangdong 518055, China; 4. GME & Geochemical Surveys, BGP, CNPC, Zhuozhou, Hebei 072751, China
Abstract：Time-frequency electromagnetic (TFEM) technology has been used in oil and gas exploration for more than 20 years and plays an important role in the field. Systematic research on TFEM data processing is of great significance for the development of this method. Regarding TFEM data processing, this paper makes clear its flow and analyzes its characteristics and advantages. Moreover, the paper gives the concept of the electromagnetic attribute, improves the method to extract main electromagnetic attribute parameters, and determines the oil-water identification factor of the TFEM method. The oil-bearing and water-bearing examples of an actual exploration area are presented, and the constraint processing and interpretation method of reservoir target multiplicity is further clarified. An actual section showing the superposition of oil-gas factors and seismic anomalies can better indicate the favorable oil-bearing targets. This research put forwards the development direction of the TFEM data processing method and has important practical value.
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