赵鹏;王英民;周瑾;唐武;陈亮;韩自亮;杨燕;

• 1:中国石油大学(北京)地球科学学院

• 2:中国石油大学(北京)油气资源与探测国家重点实验室

• 3:中国石油化工集团股份有限公司勘探开发研究院

• 4:中海油研究总院

摘要(Abstract)：

为解析下刚果盆地南部深水区盐上地层油气成藏的地质背景,基于三维地震资料研究下刚果盆地南部盐上层系的重力滑脱变形的过程,总结重力滑脱变形的特征.结果表明:下刚果盆地南部盐上地层重力滑脱构造变形体系是沉积地层在陆缘掀斜条件下,沿阿普特期盐岩层滑脱的结果,在阿尔布末期—晚白垩纪、中渐新世—现今两个时期内强烈活动,其他时期活动强度较弱.滑脱变形形成一系列在陆缘规律分布的变形构造,前缘发育伸展变形,后缘发育挤压变形,前缘地层的向前滑脱和压缩变形为后缘伸展提供补偿空间.受平面沉积负载与盐下滑脱面形态的影响,地层滑脱变形强度与变形方式具有明显的平面差异.随着沉积物向海进积,在晚期滑脱过程中地层伸展作用向前扩展,挤压作用向前后两个方向扩展,晚期挤压作用向后扩展造成先存伸展变形的挤压反转.盐体卷入到上覆地层的滑脱变形,盐岩抽空造成地层塌陷,形成相应的次级沉积中心与断裂组合,构成有利的油气圈闭.若强度适中且与烃源岩排烃史有效配合,局部构造反转有利于油气成藏.

关键词(KeyWords)：下刚果盆地南部;盐上地层;重力滑脱构造;变形特征

Abstract:

Keywords:

基金项目(Foundation):

作者(Author):赵鹏;王英民;周瑾;唐武;陈亮;韩自亮;杨燕;

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