CAJ | 학술논문

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。
매계혈암기시혈암기적중요류형지일。종매계암성조합、매계혈암기지화특정화개층조건등방면입수，부석료매계혈암기적생、배경능력급보존조건，총결료중국매계니혈암적분포특정여발육규률。연구표명：매계간락근이부식형(III형)위주，H/C교저，총유궤탄TOC치고；생경모질적성질도치매계니혈암이생기위주，차구유장기완만생경、배기태경곤난、체후，배경효솔저、잔류경량대등특점；매계중적매층기시량호적기원암，우대하복층위적혈암기기도봉개작용，인차，매계니혈암구비교호적취집성장잠력。
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.