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渝东及邻区盆山耦合关系对石炭系油气形成演化的控制

Tianranqi Gongye/Natural Gas Industry(2003)

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Abstract
渝东及邻区盆山耦合演化分为弱造山与克拉通盆地、强造山与周缘前陆盆地、造山后与残余盆地和非造山与断陷(裂谷)盆地四个发育世代,不同的盆-山关系阶段具备不同的构造、沉积和油气(藏)形成演化特征.志留系烃源岩有两次主要的成烃时期,分别受控于海西晚期克拉通"活化"沉降期、印支期-早燕山期前陆盆地快速沉降期,其中海西晚期为生油高峰期、印支-早燕山期为生烃高峰期.石炭系油气成藏经历了海西晚期地层圈闭控油阶段、印支期-早燕山期前陆古隆起控油气阶段、晚燕山-喜山期局部构造圈闭控气阶段,油气运移聚集方向发生多次叠加、汇聚和调整.盆缘强造山相关的古构造和盆内造山相关的局部构造活动是石炭系油气成藏最重要控制因素.
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Key words
Adjacent region,Basin-mountain coupling,Chongqing,Craton basin,Eeast,Foreland basin,Hydrocarbon-forming period,Oil and gas reservoiring and evolution
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