Geological Controls on the CBM Productivity of No.15 Coal Seam of Carboniferous–Permian Taiyuan Formation in Southern Qinshui Basin and Prediction for CBM High-yield Potential Regions
Corresponding Author
Zheng ZHANG
Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074 China
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074 China
State Key Laboratory of Water Resource Protection and Utilization in Coal Mining
Corresponding author. E-mail: [email protected]Search for more papers by this authorYong QIN
Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221116 Jiangsu, China
Search for more papers by this authorXinguo ZHUANG
Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074 China
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074 China
Search for more papers by this authorGuoqing LI
Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074 China
State Key Laboratory of Water Resource Protection and Utilization in Coal Mining
State Key Laboratory of Coal and CBM Co-mining, Shanxi Jincheng Anthracite Mining Group Co. Ltd., Jincheng 048000 Shanxi, China
Search for more papers by this authorDonghai LIU
Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221116 Jiangsu, China
Search for more papers by this authorCorresponding Author
Zheng ZHANG
Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074 China
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074 China
State Key Laboratory of Water Resource Protection and Utilization in Coal Mining
Corresponding author. E-mail: [email protected]Search for more papers by this authorYong QIN
Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221116 Jiangsu, China
Search for more papers by this authorXinguo ZHUANG
Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074 China
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074 China
Search for more papers by this authorGuoqing LI
Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074 China
State Key Laboratory of Water Resource Protection and Utilization in Coal Mining
State Key Laboratory of Coal and CBM Co-mining, Shanxi Jincheng Anthracite Mining Group Co. Ltd., Jincheng 048000 Shanxi, China
Search for more papers by this authorDonghai LIU
Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221116 Jiangsu, China
Search for more papers by this authorAbout the first author: ZHANG Zheng Male; born in 1990 in Hebi City, Henan Province; doctor; lecturer of Faculty of Earth Resources, China University of Geosciences (Wuhan); He is now interested in the study on coal and coalbed methane geology. Email: [email protected]; phone: 15827275189.
Abstract
Coalbed methane (CBM) resources in No.15 coal seam of Taiyuan Formation account for 55% of the total CBM resources in southern Qinshui Basin (SQB), and have a great production potential. This study aims at investigating the CBM production in No.15 coal seam and its influence factors. Based on a series of laboratory experiments and latest exploration and development data from local coal mines and CBM companies, the spatial characteristics of gas production of No.15 coal seam were analyzed and then the influences of seven factors on the gas productivity of this coal seam were discussed, including coal thickness, burial depth, gas content, ratio of critical desorption pressure to original coal reservoir pressure (RCPOP), porosity, permeability, and hydrogeological condition. The influences of hydrological condition on CBM production were analyzed based on the discussions of four aspects: hydrogeochemistry, roof lithology and its distribution, hydrodynamic field of groundwater, and recharge rate of groundwater. Finally, a three-level analytic hierarchy process (AHP) evaluation model was proposed for predicting the CBM potentials of the No.15 coal seam in the SQB. The best prospective target area for CBM production of the No.15 coal seam is predicted to be in the districts of Panzhuang, Chengzhuang and south of Hudi.
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