Controlling geological factors and coalbed methane enrichment areas in Southern Wuxiang Block, Qinshui Basin

被引：0
|
作者：
Song H. [1 ,3 ]
An H. [1 ]
Liu S. [1 ,3 ]
Yu Z. [2 ]
Jin Y. [1 ,3 ]
Wang B. [2 ,4 ]
Wang C. [1 ,3 ]
机构：
[1] School of Resources and Environment, Henan Polytechnic University, Jiaozuo
[2] State Key Laboratory of Coal and Coalbed Methane Co-Mining, Jincheng
[3] Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region of Henan Province, Jiaozuo
[4] Institute of Efficient Development and Utilization of Coal-measure Gas, Jiaozuo
来源：
Meitan Xuebao/Journal of the China Coal Society | 2021年 / 46卷 / 12期
关键词：
Analytic hierarchy process; Coalbed methane(CBM); Enrichment area prediction; Fuzzy evaluation; Qinshui Basin; Southern Wuxiang block;
D O I：
10.13225/j.cnki.jccs.2020.1911
中图分类号：
学科分类号：
摘要：
Using the coal samples from the Carboniferous-Permian Taiyuan Formation (No.15) and Shanxi Formation (No.3) in southern Wuxiang block, Qinshui Basin, Shanxi Province, the authors studied the sedimentary facies, geological structures, gas-bearing property, and coal seam occurrence characteristics, investigated the main geological controlling factors of coalbed methane (CBM) enrichment, and comprehensively evaluated the CBM favorable enrichment areas based on the fuzzy mathematics evaluation and analytic hierarchy process method. The results show that① The peat flat in the Taiyuan Formation, and the peat swamp in the Shanxi Formation are the most favorable facies belts for the development of coal seams.② No.15 coal seam of the Taiyuan Formation and No.3 coal seam of the Shanxi Formation have the same occurrence pattern. They are monoclinic structures with a north-northeast strike and a westward dipping trend. The buried depth deepens gradually from east to west. The thickness of No.15 coal seam increases gradually from southwest to northeast, and No.3 coal seam gradually thickens from north to south as a whole.③ The larger coal thickness and buried depth, the better sealing ability with sandy mudstone/mudstone, and simple geological structures or with developed reverse faults will benefit the increase of gas content in coal reservoirs.④ Finally, the comprehensive evaluated results using multi-level fuzzy mathematics indicate that the CBM favorable enrichment areas of No.15 and No.3 coal seams are the areas surrounding the exploration wells of W26-W31-W41 and W1-W20-W2 respectively. © 2021, Editorial Office of Journal of China Coal Society. All right reserved.
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页码：3974 / 3987
页数：13
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