关键词: 二连盆地, 洼槽, 油气藏, 评价, 油气远景

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