芳17区块是宋芳屯北部已投入开发的6个区块之一,由于开发时间长、已进入中高含水期,并且经过多次注采系统和注水结构调整以及压裂改造等措施,具有该油田砂体分布零散、油井流动压力高、累计耗水高,波及系数低的典型开发特征.因此,以芳17区块为典型区块,利用数值模拟方法进行注采比优化研究.在含水率为60%、70%、80%、85%、90%五个开发阶段开展了注采比优化研究,确定60%~90%之间的合理注采比范围为1.3~1.7;开展了反九点井网和五点井网注采比优化研究,结果表明井网加密调整后可以采用较低注采比开发.%Fang 17 block is one of 6 blocks that have been put into development in the northern part of Songfangtun Oilfield. Due to long time development, it has entered the high water-cut stage. After several injection production and injection structure adjustment, Songfangtun oilfield has some typical features as follows: scattered oil sand distribution, high oil well flow pressure, high cumulative water consumption and low sweep efficiency. In this paper, taking Fang17 block as a typical model, injection-production ratio was optimized by numerical simulation method. The results show that, when water-cut is between 60%~90%,reasonable injection production ratio is between 1.3~1.7. Study on injection-production ratio optimization by inverted nine-spot well pattern and five-spot pattern was carried out. The result shows that low injection production ratio can be used after well pattern infilling.
展开▼
