Abstract: Based on the sedimentary evolution,textural types,tectonic character,oil-generation condition,reser-voir-generation pattern,oil-bearing situation and exploration effect of sub-sags,taking the sub-sags as an element,the thirty-three depressions in Erlian Basin are classified and estimated.Five types of sub-sag models have been set up primarily.The law of oil-gas control in different sags have been studied.Finally it is pointed out that hydrocarbon generation and oil-gas pool,arrangement are strictly controlled by sediment and tectonic character of sub-sags.The sub-sag with fault-sag inheritance is of the best reservoir generation conditions and the highest exploration efficiency.The reservoir generation condition of large and middle sub-sags in the fault-sag onlap inheritance and fault-sag transition are the better ones.The center fracture structural belt and slope zone are the best oil-gas accumulation zone with good exploration prospect,they are the major sub-sags of oil-gas exploration and the reservoir storage in the near future.

Key words: Erlian Basin, sub-sags, oil-gas reservoir, evaluation, hydrocarbon potential

摘要： 依据洼槽的沉积演化、结构类型、生油条件、成藏模式、含油现状和勘探成效,对二连盆地33个凹陷以洼槽为单元分类评价.初步建立了5种洼槽式样,研究了不同类型洼槽的控油规律.指出洼槽的沉积、构造同性严格控制油气生成和油气藏展布①,断槽继承型洼槽成藏条件最好,勘探成效最高,断超继承型和断槽过渡型大中型洼槽成藏条件较好,其中央断裂构造带和斜坡带是有利聚油带,具有良好的勘探前景,属近期油气勘探和储量接替的主要洼槽.

关键词: 二连盆地, 洼槽, 油气藏, 评价, 油气远景