Abstract: The middle and shallow strata of Taibei sag in Tuha basin have entered into prospecting stage of non-structural reservoirs, so it is meaningful for in-time study of the non-structural traps to select targets and ascertain major directions for petroleum exploration. The comprehensive analysis of sequence stratigraphic framework in this sag by applying sequence strati graphy and slope break theory suggests tural traps. The results show that there exist two types or four kinds of lithologic and stratigraphic traps in middle and shallow strata of Taibei sag, where Putaogou structural belt in north slope of Huoyanshan, Subashi and Lianmuqin nose-like uplifts in southern margin of Shengbei sub-sag, central part and south slope of Qiudong sub-sag, Gedatai and Hongtai nose like uplifts in southem margin of Xiaocaohu sub-sag are the most promising domains for petroleum prospecting.

Key words: Turpan basin, Hami basin, Taibei sag, non-structural trap, subtle trap, exploration