Abstract: The Erlian-rifts consist of over fifty fault-depressions. Under the same regional tectogenesis,each of the fault-depression has a similar evolutionary history and tectonic development.Independent sedimentary units were formed in them and can be identified easily. The potential HC resources and petroleum abundance of each fault-depressions is quit different. The nature of HC generation is systematically analyzed from the theory of the forming and evolution of rift basin. The pattern of oil generation in Lower Cretaceous is concluded,and the exploration direction in the Erlian rifts was indicated.

Key words: Lower Cretaceous, source rocks, hydrocarbon generation, Erlian-rift

摘要： 二连裂谷系是由50多个断陷组成,它们在相同的区域构造作用下,既有相似断陷演化史和相似构造发展史,又有独立的沉积单元和明显的外在可分性,各个断陷生油气潜力和油气富集程度相差极其悬殊.文中用裂谷盆地形成及演化的观点系统分析了断陷群的油气生成规律,总结出下白垩统的成油模式,指明二连裂谷系的勘探方向.

关键词: 下白垩统, 烃源岩, 油气生成, 二连裂谷系