| 煤系页岩气的基本特点与聚集规律 |
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| 引用本文： | 曹代勇,王崇敬,李靖,秦荣芳,杨光,周济.煤系页岩气的基本特点与聚集规律[J].煤田地质与勘探,2014,42(4):25-30. |
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| 作者姓名： | 曹代勇 王崇敬 李靖 秦荣芳 杨光 周济 |
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| 作者单位： | 中国矿业大学地球科学与测绘工程学院; |
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| 基金项目： | 国家自然科学基金项目(40872105);高等学校博士学科点专项科研基金项目(20110023110003);中央高校基本科研业务费专项资金项目(2010YD11) |
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| 摘 要： | 煤系页岩气是页岩气的重要类型之一。从煤系岩性组合、煤系页岩气地化特征和盖层条件等方面入手，剖析了煤系页岩气的生、排烃能力及保存条件，总结了中国煤系泥页岩的分布特征与发育规律。研究表明:煤系干酪根以腐殖型(III型)为主，H/C较低，总有机碳TOC值高；生烃母质的性质导致煤系泥页岩以生气为主，且具有长期缓慢生烃、排气态烃困难、滞后，排烃效率低、残留烃量大等特点；煤系中的煤层既是良好的气源岩，又对下伏层位的页岩气起到封盖作用，因此，煤系泥页岩具备较好的聚集成藏潜力。
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| 关 键 词： | 煤系 页岩气 基本特征 聚集规律 保存条件 |
| 收稿时间： | 2013-05-29 |
Basic characteristics and accumulation rules of shale gas in coal measures |
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| Abstract: | shale gas in coal measures is one of the important types of shale gas. This paper studies the hydrocarbon generation and expulsion capacity and preservation conditions of shale gas in coal measures, discusses the development features and distribution rules of shale in China's coal measures. The research indicates that the main characteristics of coal shale are as follow:humus type (type III) of kerogen is predominant, H/C is lower and TOC is higher than that of the usual shale; the low efficiency of oil generation which gives priority to long-term gas generation, difficult and hysteretic gaseous hydrocarbon expulsion, low efficiency of expulsion hydrocarbon and large volume of residual hydrocarbon because of the nature of organic matter; coal seam is not only good source rock, but also is cap-rock with good sealing ability for underlying layers. Therefore shale in coal measures holds favorable ability of gas accumulation and enrichment potential. |
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