Abstract: The systematic researches of the geological conditions of tight oil of Qiketai formation of Jurassic in Turpan?Hami (Tuha) basin and its prediction of favorable areas are made in this paper based on data from a lot of source rocks and reservoir tests, compared with related well logging and seismic imformation. The results show that the tight oil reservoir is mainly distributed in the upper section of Qiketai formation and Taibei sag, with thickness of 30~130 m. The lithology is dominated by gray dolomite, dark mudstone and marl, widely developing structural fractures, intergranular pores and dissolved micropores, and the average content of quartz + carbonate +feldspar is over 65%. The underlying hemi?deep lake facies mudstone is regionally stable in distribution, largely contacting with the overlying reservoirs. Through superimposition of the superior hydrocarbon and the tight reservoir, this paper predicts the favorable area for tight oil exploration, with sweet spot area of 550 km2, mainly distributing around Shengbei 11- Shengbei 10-Liansha 2 well area