封闭小断块油藏具有含油面积小、纵向小层多、非均质严重的特点，该类油藏常规连续注采方式下注水含水上升快，不注水没能量，断层夹角和断边带剩余油动用程度低。提出了采油井和注水井注采交替的技术方法，建立实际油藏模型，数值模拟研究表明，该方法可以大幅度扩大水驱波及面积，技术应用取得好效果。“,”Closed small fault block reservoir has the characteristics of small oil area, small layers and serious heterogeneity.This paper presents a technique of alternate injection production between production wells and water injection wells. The actual reservoir model is established, and the numerical simulation shows that this method can greatly expand the swept area of water flooding, and the application of this technique has achieved good results.