The Yan’an Formation reservoir in the Ordos Basin is mainly a lithologic-structural reservoir with weak bottom water energy, which needs to be developed by water injection. For a long time, the lack of in-depth understanding of the movement law of injected water and bottom water flooding has directly affected the formulation of development adjustment plans, and the reservoir development effect is difficult to achieve expectations. In order to clarify the characteristics of oil–water flow under the dual drive of injected water and bottom water, this paper establishes a reservoir conceptual model with different oil–water contact relationships, and uses numerical simulation methods to study the oil well effect, water injection ripple, bottom water coning and remaining oil distribution. The research shows that the oil wells in the diamond inverted nine-spot well pattern are affected by the two injection wells closest to them. The reserves in the triangle area composed of corner wells and two adjacent side wells are difficult to use, and the remaining oil is enriched. It is a favorable area for side-tracking, update and encryption adjustment. After the front edge of the plane water flooding is advanced to 60% of the injection-production well spacing, the water injection advancement speed is accelerated, and the bottom water is lifted to 50% of the water avoidance height, the coning speed is accelerated. Therefore, after the plane and vertical water flooding break through the critical point, the production parameters should be controlled to slow down the water breakthrough contradiction.