In the high water cut stage, research on residual oil distribution has been the fundamental task of making tapping measures and enhancing oil recovery. Based on cores, well loggings and production performance data et al, high-resolution sequence stratigraphic theories and architecture analysis method were synthetically applied to the study of channel bars’ architecture characteristics and evolution law, controlled by base-level cycles.Meanwhile, 3 different types of residual oil distribution patterns were built.The results showed that the developing scope and spatial overlaying styles of channel bars were controlled by base-cycles changes.During the period of late descending and early rising of base-level cycle, the reservoir was dominated by channel bar sands, and the reservoir was more developed, its formation communication and injection- production performance were better, residual oil was relatively less;with the rising of base level, the reservoir was dominated by channel sands and channel-bar sands, and the reservoir was relatively less developed, its formation communication and injection- production performance were worse,residual oil was relatively richer.The achievements and recognitions of this study had an effective guidance in water injection program establishment and residual oil distribution prediction.