Abstract: Jin-16 block of Liaohe oilfield is characterized by multiple new wells and abundant data and through synthetic analyses of reservoir engineering, dynamic monitoring, and core analysis, the regularity study of remaining oil distribution has been carried out from macroscopic to microscopic and big scale to small scale. The control model of remaining oil at extra high water-cut stage has been established, especially making a detailed study on controlling effect of interlayer. According to the remaining oil features, the potential tapping has been put into practice and achieved good effect.