| 贵州对江南井田地面煤层气抽采潜力分析 |
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| 引用本文： | 胡正田,张东亮,万志杰,巩泽文.贵州对江南井田地面煤层气抽采潜力分析[J].煤田地质与勘探,2015,43(5):49-52. |
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| 作者姓名： | 胡正田 张东亮 万志杰 巩泽文 |
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| 摘 要： | 对江南井田位于贵州织纳煤田西部,为高阶无烟煤赋存区,煤层发育具有层数多、厚度薄、成群分布"的特点。采用气含量测试、注入/压降试井、钻孔煤层和煤体结构分析等方法,对煤储层含气性、渗透性、储层压力和地应力等进行了系统分析。采用体积法估算了对江南井田煤层气资源量,评价了煤层气可采性和资源潜力。结果表明:对江南井田煤层气保存条件好,气含量高,资源量大,资源丰度较高;构造作用虽然破坏了煤的原生结构,但可采煤层均以碎裂结构为主,煤储层仍然保留有较好的裂隙网络,储层增渗可改造性强,具有抽采潜力。
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| 关 键 词： | 煤层气 煤储层 抽采潜力 对江南井田 |
| 收稿时间： | 2015-01-22 |
CBM drainage potential of Duijiangnan coal mine,Guizhou province |
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| Abstract: | Duijiangnan Coal Mine is located at the west of Zhina Coal Field, Guizhou Province. Coal seams in this area present the characteristics of thin thickness and multi-seam group. Based on the gas content test, injection/falloff well test, coal structure frequency statistics of boreholes, the gas bearing property, permeability, reservoir pressure and in-situ stress, etc, were systematically studied. The CBM resources extent was estimated with volume method, the recoverability and CBM resource development potential were evaluated preliminarily. Results showed that the gas content from Duijiangnan Coal Mine is high with good preservation condition, the CBM resources are of relatively large amount and high density. The texture of coal that experienced tectonism is mainly cataclastic with natural fracture network, the permeability of coal can be enhanced by hydraulic fracturing, and the CBM resources present relatively good drainage potential. |
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