Author/Authors :
Hong, Yi-du Quanzhou Institute of Equipment Manufacturing - Haixi Institutes - Chinese Academy of Sciences, Quanzhou, Fujian, China , Lin, Bai-quan School of Safety Engineering - China University of Mining and Technology, Xuzhou, Jiangsu, China , Xiang, Hua Department of Offshore Oil and Gas Field Development - Faculty of Oil and Gas Field Development - Gubkin Russian State Universityof Oil and Gas, Moscow, Russia , Zhu, Chuan-jie School of Safety Engineering - China University of Mining and Technology, Xuzhou, Jiangsu, China , Wang, Zheng School of Safety Engineering - China University of Mining and Technology, Xuzhou, Jiangsu, China , Nie, Wen Quanzhou Institute of Equipment Manufacturing - Haixi Institutes - Chinese Academy of Sciences, Quanzhou, Fujian, China
Abstract :
The experimental work in this paper investigated the effect of microwave energy on pore structure and gas permeability of coal cores. Fifteen coal samples were irradiated under the condition of 2.45 GHz with 6 kW. The effect of microwave irradiation on the pore structure of coal samples was evaluated by nuclear magnetic resonance (NMR). The water saturation degree has little influence on transverse relaxation time T2 distribution before the microwave treatment. By contrast, water saturation degree obviously affects the T2 distribution after the microwave energy treatment. Coal permeability increased after microwave energy treatment. But fractal dimension decreased after microwave energy treatment. The results show that microwave energy has a potential for degassing coal seams.
