两淮含煤岩系煤层气与页岩气富集特征及共采选区评价  

ENRICHMENT FEATURES OF COAL-GAS AND SHALE GAS IN COAL MEASURES AND APPRAISAL OF THEIR CO-MINING ZONES IN THE LIANGHUAI COALFIELDS

作　　者：赵志义[1,2] 张文永 孙贵[1,2] 窦新钊 ZHAO Zhi-yiu;ZHANG Wen-yong;SUN Gui;DOU Xin-zhaou(Research Institute of Bureau of Coed Geology of Anhui Province Hefeiy Anhui 230088,China;Unconventional Natural Gas Engineering Technology Research Center of Anhui Province,Hefeiy Anhui 230088,China)

机构地区：[1]安徽省煤田地质局勘查研究院,安徽合肥230088 [2]安徽省非常规天然气工程技术研究中心,安徽合肥230088

出　　处：《安徽地质》2019年第3期179-183,共5页Geology of Anhui

基　　金：安徽省公益性地质工作项目（2012-g-17）;中国地质调查局油气资源调查中心项目（项目编号：0747-1961SCCZN205）;安徽省重点研究和开发计划项目（项目编号：1804a0802203）资助

摘　　要：以安徽两淮煤田石炭-二叠系含煤岩系烃源岩为研究对象,通过钻孔岩芯样品测试分析,系统研究了两淮煤田含煤岩系煤储层及7套富有机质泥页岩储层(N1-N7)的有机地球化学特征、含气性特征等,分析了两淮煤田煤层气和页岩气的共存富集特征,优选出4个勘查有利区。研究认为:两淮煤田煤层与富有机质泥页岩层数多,厚度大、分布连续,有机碳含量高,有机质热演化属于成熟阶段,含气量高,具有煤层气和页岩气成藏的基础地质条件,在构造相对简单的向斜以及外围深部地区煤层气与页岩气同时富集成藏。研究区煤层气与页岩气共存组合存在四种气藏模式。太原组-山西组-下石盒子组-上石盒子组具有形成煤层气和页岩气四种气藏的源岩条件,是适合开展共采研究的有利层位。淮北煤田南坪向斜、宿南向斜、宿东向斜以及淮南煤田潘谢矿区深部地区,可作为开展煤层气与页岩气合探共采研究与勘查的优选区域。By drilling core sample test and analysis,this paper targets the hydrocarbon source rocks of Permo-Carboniferous coal measures in the Lianghuai coalfields in Anhui,makes a systematic study of the organic geochemical features and gasbearing features of coal reservoir and 7 organic matter-rich shale reservoirs(N1-N7)in the measures,analyzes coexistence and enrichment features of coal gas and shale gas,and gives four favorable exploration areas.It is suggested that the Lianghuai coalfields have many coal measures and shale layers rich in organic matter,which are great in thickness,continuous in distribution and rich in organic carbon,with organic matter thermal evolution in mature stage,with high gas content,having basic geological conditions for accumulation of coal gas and shale gas,both of which enrich and accumulate simultaneously in relatively simple structures of synclines and the peripheral depths,and show four gas reservoir models of coexistence in the study area.The Taiyuan,Shanxi,Xiashihezi and Shangshihezi Formations have the source rock conditions for forming the four kinds of gas reservoirs,favorable to study of co-mining of the two.The Nanping,Sudong and Nanping synclines of the Huaibei coalfield,as well as the deep area of the Panxie mining area of the Huainan coalfield,can be the priority zones for combined research and exploration of coal gas and shale gas.

关 键 词：两淮煤田 石炭-二叠系 煤层气 页岩气 富集特征 共采 

分 类 号：P618.1[天文地球—矿床学]