海上油田水聚干扰影响因素分析及矿场试验研究

水聚交叉井网会造成水聚干扰现象,导致聚驱效果变差。针对此问题,结合海上典型注聚油田地质油藏特征,利用数值模拟软件开展水聚干扰机理及影响因素研究,并在此基础上制定相应的调整策略。矿场试验表明,通过针对性优化注水井转注聚顺序及水聚注入强度,有效控制了分批次转注聚期间出现的水聚干扰,油井受益率达到86%,实现净增油482.0×10^4 m^3,提高采出程度5.1%。聚驱降水增油效果稳定,达到改善聚驱开发效果的目的。

Influencing factors analysis and field test of water and polymer interference in offshore oilfields

Water and polymer cross-well pattern will cause water and polymer flooding interference, which will result in poor polymer flooding effect. In view of this problem, combining with the geological reservoir characteristics of typical offshore polymer injection oilfields, by using the numerical simulation software, the study on mechanism and influencing factors of water and polymer interference was carried out, and on this basis, corresponding adjustment strategies were made. Field tests show that by optimizing the sequence and intensity of water flooding, the water and polymer interference during the period of batch water flooding can be effectively controlled, and the benefit rate of oil wells can reach 86%. The net increase of oil production is 482.0 ×10~4 m~3, the recovery degree is increased by 5.1%. The effect of decreasing water and increasing oil is stable, and the development effect of polymer flooding can be improved.