OALib Journal期刊
ISSN: 2333-9721
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三塘湖盆地侏罗系油气来源与油气成藏模式
Keywords: 油气藏,控制因素,成藏模式,侏罗系,三塘湖盆地
Abstract:
?通过三塘湖盆地基本地质条件、烃源岩特征、油气特征和来源分析,结合构造、地层特征,建立了侏罗系油气藏成藏模式,分析了油气成藏的主要控制因素。认为三塘湖盆地侏罗系的油气主要来自二叠系芦草沟组烃源岩,也有三叠系和部分侏罗系烃源岩的贡献,有些天然气与侏罗系的关系非常密切。由于储集层与烃源岩的空间配置关系以及构造位置的不同,存在不同的成藏模式,总体以古生新储式成藏为主,自生自储式油气成藏规模较小。烃源岩不直接控制油气藏的分布,但在一定烃源岩分布范围内,好的储集层与一定的背斜形态、断裂的配置有利于成藏,单纯的单斜背景对侏罗系油气的聚集不是很有利。
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