Abstract：By the aid of 3-D seismic piece-tied prestack time migration data,the paper systematically analyzed the geologic structure and its formation and evolution.The following knowledge can be resulted from above analysis:①typical expanded halfgraben characterized by fault in the east and onlap in the west has been formed from Eocene to Oligocene,where the eastern part is steep slope zone and western part is slope,and center of sedimentation or subsidence is in Rongshengpu depression;②the structural evolution in the eastern steep slope mainly has involved four stages,elongated fault-depressed stage,compresso-shear strike-slip reform stage,depression stage and compressive-overturned stage;③the elongated fault in the early age,after reformation of later compresso-shear fault system,formed various structural patterns and these structural traps are closely adjacent to oil-generating depression and have superior reservoir conditions,especially the flower structural belt,compressive anticline,thrust block and shallow overturned structure formed on the basis of original elongated fault plane have good exploration prospect.
孙增玖, 崔全章, 向晟. 大民屯凹陷东部陡坡带构造演化特征[J]. 石油地球物理勘探, 2008, 43(3): 355-359.
Sun Zeng-jiu, Cui Quan-zhang, Xiang Cheng. Feature of structural evolution in eastern steep slope zone of Damingtun sag. OGP, 2008, 43(3): 355-359.
