摘要
在区域地质调查、露头剖面测量、钻孔编录等野外地质工作的基础上,对上二叠统林西组烃源岩的分布特征、沉积特征及有机地球化学特征进行了研究。结果表明,上二叠统林西组分布广泛、厚度巨大、暗色泥页岩发育,烃源岩的有机质丰度为中等—好,有机质类型主要为Ⅱ型,有机质热演化程度为高成熟—过成熟,达到生气阶段,是大兴安岭中南部地区重要的生烃层位。综合评价认为,林西组具有较高的页岩气资源前景,是本区晚古生代最有利的页岩气勘探新层系之一。
Based on regional geological survey,outcrop profile measurement and borehole logging,the authors analyzed sedimentary characteristics,distribution and organic geochemistry of hydrocarbon source rock in Upper Permian Linxi Formation,and the results show that late Permian Linxi Formation has wide distribution,large thickness,well-developed dark mudstones,and abundant organic matter.The abundance of hydrocarbon source rocks in Linxi Formation is from medium scale to good,the organic matter is mainly of typeⅡ,the thermal evolution of organic matters has entered the high mature-over mature stage and consist mainly of dry gas,thus Linxi Formation serves as important hydrocarbon source rock horizon.The comprehensive evaluation of Linxi Formation is likely to reveal higher shale gas resource prospect,and hence the formation is the most favorable late Paleozoic shale gas exploration formation in this area.
出处
《地质通报》
CAS
CSCD
北大核心
2013年第8期1297-1306,共10页
Geological Bulletin of China
基金
中国地质调查局项目(编号:1212011120970、1212011121086)
关键词
大兴安岭中南部
林西组
烃源岩
页岩气
资源前景
middle-southern part of the Da Hinggan Mountains Linxi Formation hydrocarbon source rock shale gas resources prospect
