Abstract: Based on the conventional well logging data of flooded layers interpretation from intensive translayer wells and injection?production interwell translayer wells in 2008—2012 in the thin and bottom water reservoir with low magnitude and mid?high permeability of Cretaceous Hutubihe formation in Luliang oilfield of Junggar basin, detailed reservoir geological model and numerical simulation model were developed, by which such problems as the size and extensional direction of thin mud and calcareous sandwich as well as the oil?water transi?tion zone were dealt with, obtaining satisfactory production history matching results and good agreement with the actual flooded location and thickness. And the remained oil distribution and waterdrive regularity of this reservoir are properly determined. Also, the reasonably optimizing well pattern adjustment mode for this reservoir is proposed for the first time. This will be helpful to the subsequent improvement of water flooding system, the waterdrive efficiency enhancement and EOR in this oilfield as well as a reference for study of similar reservoirs development