南京大学学报(自然科学版) ›› 2012, Vol. 48 ›› Issue (3): 295–307.
李荣西1,2**董树文3，张少妮1,2，朱瑞静1,2，夏彬1,2
Li Rong一Xi1.2，Dong Shu Wen3，Zhang Shao Ni1,2，Zhu Rui一Jing 1，2,Xia Bin1.2
摘要： 野外调研和显微镜卜岩相学观察研究表明，大巴山构造带不同构造单元有机流体类型多样,特征各异.北大巴山冲断一推覆构造带发育变质流体包裹体和大量有机流体包裹体.大巴山前陆构造和前陆坳陷区发育三期有机流体包裹体，即液态烃包裹体、纯气态烃包裹体以及储层沥青和占油藏沥青，它们记录了大巴山造山过程中油气形成和演化历史有机流体包裹体甲烷气δ13C1为一17. 036‰一30. 390‰.δD为一107. 712‰~一156. 730‰，表明其为油型运移天然气.有机地球化学分析表明，大
巴山断裂带运移沥青和占油藏沥青原始有机母质以低等水生生物和藻类有机质来源为主，与下寒武统碳质泥岩烃源岩和下二叠统碳酸盐岩烃源岩具有亲缘关系.结合构造演化特征研究认为，印支构造运动之前，大巴山构造带占生代烃源岩在正常埋藏热演化作用下形成液态烃，印支碰撞造山使液态烃大规模运聚成藏，燕山构造运动形成大巴山前陆并伴随占油藏破坏，同时使大巴山前陆坳陷区液态油热解形成天然气藏.大巴山造山过程有机流体研究表明，大巴山前陆不但有天然气成藏过程，而且有液态烃形成和成藏历史.
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