为提高潜山裂缝性油藏不稳定注水效果,对锦州251南潜山油藏储层发育主控因素分析后将其分为三类储层模式，并明确了各类储层模式剩余油分布规律及挖潜重心。在此基础上,进行注水方式和各类储层的适应性研究。研究结果经矿场试验表明:Ⅰ类储层采用脉冲注水、注水周期4个月、累积注采比1.0;Ⅱ类储层采用周期注水、注水周期6个月、累积注采比0.9;Ⅲ类储层采用异步注采、注水周期8个月、累积注采比0.8,开发效果最优。研究成果指导了潜山裂缝性油藏优化注水工作的开展,可为同类油藏的开发提供借鉴。

To address the challenges of unstable water injection in buried hill fractured reservoirs, this paper focuses on the Bohai buried hill fractured reservoirs, specifically the JZ25-1S reservoir. We analyzed the primary factors influencing the development of fractured reservoirs and established three distinct reservoir models. Subsequently, we defined the distribution of remaining oil in these models. Based on this, we studied the adaptability of various water injection modes to the reservoir models. Our findings indicate that for type I reservoirs, pulse water injection is optimal with a 4-month injection cycle and a cumulative injection-production ratio of 1.0. For type Ⅱ reservoirs, periodic water injection is recommended, with a 6-month cycle and a ratio of 0.9. Lastly, for type Ⅲ reservoirs, asynchronous injection-production is most effective, with an 8-month cycle and a ratio of 0.8. These insights offer guidance for optimizing water injection in fractured reservoirs and serve as a reference for the development of similar reservoirs.