The application and evaluation of the wide field electromagnetic method in the low resistance coverage area-Exemplified by Zhongmu area of Henan Province
TIAN Hong-Jun1,2(), YIN Wen-Bin1,2, LIU Guang-Di1,2, JIANG Yong-Fang1,2, YOU Wen-Bing1,2
1.Hunan Geosun High-Tech Co., Ltd., Changsha 410208, China 2.Hunan Deep Earth Resources Electromagnetic Exploration Engineering Technology Research Center,Changsha 410208, China
Based on an analysis and summary of the physical properties of the gas-bearing shale layer in Zhongmu area of Henan Province, the authors used the wide-area electromagnetic exploration technology to detect shale gas in the low-resistance coverage area of the Nanhua Basin, obtained the distribution regularity and characteristics of the stratigraphic resistivity within 5km under the work area, and ascertained the structural distribution of the work area. In addition, the development characteristics of gas-bearing shales were revealed, with the main target layers being the Permian Taiyuan Formation, Shanxi Formation, Upper Shihezi Formation and Lower Shihezi Formation. The results show that, in the low-resistance coverage area, the wide-field electromagnetic method is an effective detection method to obtain the buried depth and distribution range of deep gas-bearing shale in the Nanhua Basin, providing geophysical parameters for the evaluation of favorable zones in the later period and the optimization of shale gas layers in the block.
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TIAN Hong-Jun, YIN Wen-Bin, LIU Guang-Di, JIANG Yong-Fang, YOU Wen-Bing. The application and evaluation of the wide field electromagnetic method in the low resistance coverage area-Exemplified by Zhongmu area of Henan Province. Geophysical and Geochemical Exploration, 2020, 44(5): 1025-1030.
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doi: 10.11764/j.issn.1672-1926.2014.11.1767
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