三叠系油藏堵驱结合技术的探索应用

Exploration and application of plugging and flooding combined technology in Triassic reservoir

针对胡尖山油田三叠系油藏储层非均质性强、注入水波及范围小、驱替效率低且多轮次调剖调驱效果减弱等问题,以H4区油藏为研究对象,基于前期矿场试验效果,优选近井调剖封堵体系与纳米微球深部调驱体系相结合,充分发挥协同治理优势。结果表明,堵驱结合技术在非均质油藏中具有较好的控水增油适应性,对应油井见效率、含水率下降幅度、平均单井增油量均优于单一体系,为同类型油藏调剖调驱体系组合优化提供借鉴参考。

In view of the problems such as strong reservoir heterogeneity,small injection water sweep range,low displacement efficiency and weak effect of multiple rounds of profile control and flooding in Hujianshan oilfield,taking H4 reservoir as the research object,based on the results of previous field tests,the combination of near-well profile control and plugging with nano-microsphere deep profile control and flooding system is preferred to give full play to the advantages of collaborative management.The results indicate that the combination of plugging and flooding technology has good adaptability for controlling water and increasing oil production in heterogeneous reservoirs.The corresponding oil well breakthrough efficiency,water cut reduction amplitude,and average single well oil production are all better than the single technology,providing reference for optimizing the combination of profile control and flooding systems in similar reservoirs.