【摘 要】
：
桑托斯盆地历经近十年的勘探,盐下裂谷系发现了多个特大型碳酸盐岩构造油藏,揭示该领域巨大的勘探潜力.盆地的构造变形不但控制着沉积地层的分布,也制约了盆地内油气地质条件和空间匹配关系,进而决定了盆地内油气成藏规律和富集特征.为了探究盆地盐下裂谷系油气富集规律,指导油气勘探,根据3D深度域地震资料及钻井数据,梳理裂谷系构造特征,总结构造对油气成藏控制作用.结果表明:裂谷系主要发育伸展断裂系统,局部存在雁行排列的走滑变形;构造发育具有由西向东迁移的时序特征,中央坳陷带的中央凹陷是裂谷早期沉积沉降中心,受先存隐伏基
【机 构】
：
中国海洋石油国际有限公司北京 100028
论文部分内容阅读
桑托斯盆地历经近十年的勘探,盐下裂谷系发现了多个特大型碳酸盐岩构造油藏,揭示该领域巨大的勘探潜力.盆地的构造变形不但控制着沉积地层的分布,也制约了盆地内油气地质条件和空间匹配关系,进而决定了盆地内油气成藏规律和富集特征.为了探究盆地盐下裂谷系油气富集规律,指导油气勘探,根据3D深度域地震资料及钻井数据,梳理裂谷系构造特征,总结构造对油气成藏控制作用.结果表明:裂谷系主要发育伸展断裂系统,局部存在雁行排列的走滑变形;构造发育具有由西向东迁移的时序特征,中央坳陷带的中央凹陷是裂谷早期沉积沉降中心,受先存隐伏基底走滑断裂的分割,表现为南、北2个洼陷,东部凹陷因裂陷中心的迁移而主要在裂谷晚期后发育;构造变形控制了盆地油气成藏条件,烃源岩主要在中央凹陷分布,远岸火山型基底高的迎浪开阔缓坡是碳酸盐岩优质储层发育区,断裂活动不但可以形成高效的油源通道,也造就了大量伸展型圈闭以及与走滑作用相关的反转背斜圈闭,盆地中央坳陷带内低凸起是下一步油气勘探的有利区.
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