湘中地区页岩气勘探潜力与地化特征评价

Petroleum Geophysics(2013)

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Abstract
湘中拗陷为中扬子地台页岩气研究的重点区域,通过野外露头、有机地球化学及钻井资料,分析该区泥盆—二叠系页岩气资源勘探远景。研究表明,湘中拗陷页岩主要以中泥盆统棋子桥组、上泥盆统佘田桥组、下石炭统大塘阶测水段、二叠系上统龙潭组和大隆组为主。该5套泥质岩及页岩有机碳含量高,有机质类型好,热演化程度高,基本达到成熟—过成熟阶段,是有效页岩气气源岩。同时,该区早古生代沉积环境和后期热演化、构造改造等与美国东部页岩气盆地相似,据此可推断湘中拗陷页岩气勘探潜力较大。
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Key words
shale gas,mud shale and organic geochemistry,Xiangzhong depression
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