The Zhouchang area, where the oil is mainly accumulated in Mesozoic sandstone reservoirs, is located in the Ordos Basin, China. Paleogeomorphology plays an important role in the oil accumulation of the Jurassic Yan'an Formation. Previous studies on paleogeomorphology propose that Lower Jurassic oil reservoirs are distributed in the higher units, such as the paleoslope, which is now proved to be not completely accurate in this study. The paper mainly focuses on paleogeomorphology restoration, favorable oil accumulation conditions, oil accumulation patterns, and favorable area prediction. Based on the stratigraphic division of the Lower Jurassic strata, the pre-Jurassic paleogeomorphology is precisely restored using the moldic method and is divided into secondary units. Furthermore, the controlling effects of the pre-Jurassic paleogeomorphology on oil accumulation are discussed. Results indicate that the paleogeomorphology can be divided into paleochannel, paleoslope, and paleohighland in the study area. The proved oil is distributed not only in the paleoslope but also in the lower paleochannel, which is different from previous study conclusions. Paleochannel sandbodies provide a conducive pathway and storage space for oil migration and accumulation, and the sandbodies in the paleoslope area are considered as favorable reservoir strata. Paleogeomorphology-controlled microamplitude structures are suitable traps for oil preservation. Two patterns for oil accumulation in 2D are newly established: paleochannel-braided channel-delta plain pattern and paleoslope-braided channel-delta plain pattern. The pattern for oil accumulation in 3D is also created for the first time. Through the studies above, four favorable areas for oil accumulation in Zhouchang area are predicted.