| 准噶尔和吐哈盆地侏罗系煤层气储集特征 |
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| 引用本文： | 桑树勋,秦勇,郭晓波,陈玉华.准噶尔和吐哈盆地侏罗系煤层气储集特征[J].高校地质学报,2003,9(3):365-372. |
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| 作者姓名： | 桑树勋 秦勇 郭晓波 陈玉华 |
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| 作者单位： | 1. 中国矿业大学，江苏徐州 221008; 2. 枣庄矿业集团公司，山东枣庄 277100 |
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| 基金项目： | 国家重点基础研究发展规划(973)项目(2002CB211703)资助 |
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| 摘 要： | 西北侏罗纪陆相盆地低煤级煤层气藏勘探开发近年来受到越来越多的关注，煤层气成藏机制是该区煤层气勘探开发的重要基础工作，而煤层气储集是煤层气成藏的关键地质过程。研究表明：准噶尔、土哈两个侏罗纪陆相盆地低煤级煤储层具有高孔容、高孔比表面积、高游离气储集潜力和低原位吸附气体能力的特征，深部煤储层储集气量显著高于浅部煤储层；浅部煤储层中基本上为吸附气，深部煤储层中吸附气、游离气、溶解气共存，游离气的重要性随埋深增加而增大；构造高点和构造圈闭对深部煤层气成藏具有重大影响，煤层气与常规气兼探与共采在理论上可行。深部煤层气藏可能较浅部煤层气藏更具开发价值。
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| 关 键 词： | 低煤级煤 煤层气 储集 侏罗系 准噶尔盆地 吐哈盆地 |
| 文章编号： | 1006-7493(2003)03-365-08 |
| 收稿时间： | 2003-09-20 |
Storing Characteristics of Jurassic Coalbed Gas in Junggar and Tuha Basins |
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| SANG Shu-xun,QIN Yong,GUO Xiao-bo,CHEN Yu-hua.Storing Characteristics of Jurassic Coalbed Gas in Junggar and Tuha Basins[J].Geological Journal of China Universities,2003,9(3):365-372. |
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| Authors: | SANG Shu-xun QIN Yong GUO Xiao-bo CHEN Yu-hua |
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| Institution: | 1. China University of Mining and Technology, Xuzhou 221008, China; 2. Zaozhuang Mining Group, Zaozhuang 277100, China |
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| Abstract: | Coalbed gas exploration and development of the low-rank coal reservoirs in the Jurassic continental basins of Northwest China is drawing more an more attentions ．The reservoirforming mechanism is important for the exploration an d development of the coalbed gas because the coalbed gas store is one of the key geological processes．The results of this study indicate that there are high pore volume，high pore specific surface area，high free gas storing potential and low gas absorption in the low-rank coal reservoirs of the Jurassic continental basins in the Junggar and Tuha Basins and the gas storage quantity in the deep coal reservoirs might be remarkably higher．The shallow coal reservoirs pools primarily absorption gas ， but in the deep coal reservoirs ，absorption，dissociation and dissolution gases may coexist．The structural elevation and traps might influence greatly the formation of deep coalbed gas pools． Concurrent exploration and development for both coalbed gas and normal natural gas is theoretically feasible，however，the deep coalbed gas reservoirs might be more valuable for the development． |
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