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地质论评  2002 

羌塘盆地中部隆起的演化及其在油气勘探中的意义

Keywords: 羌塘盆地古隆起裂谷半地堑石油天然气西藏油气勘探

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Abstract:

本文从沉积演化的角度分析了羌塘盆地中西部“冈玛错-西雅尔岗”隆起的演化过程,隆起在晚二叠世处于雏型发育阶段,晚三叠世肖茶卡-中株罗世雀昏时期为定型阶段,白垩纪-新生代为变形改造阶段。每一阶段隆起都控制着不同形式的生储盖组合的发育。隆起周缘具半地堑结构的凹陷是良好的油气聚集带之一。近隆起带北侧的构造层变形强度不大,对油气的后期保存比较有利。

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