萨南开发区水驱高含水后期合理注采比的确定方法研究

针对萨南开发区经过一次、二次及三次加密调整进入高含水后期开发的实际,将整个区块作为研究对象,以物质平衡原理与Logisitic旋回理论相结合,对合理注采比的确定方法进行了研究：一是运用物质平衡方法确定了压力恢复速度与地下注采液量差的关系;二是确定了不同含水时年产量与年注水量的定量关系;三是研究了压力恢复速度与注采比、含水的关系。最后应用该方法确定了萨南开发区“十五”期间的合理注采比,现场实践表明该方法的应用较好地指导了油田开发调整。

Determination of Reasonable Production/Injection Ratio in Sanan Development Area at High Water Cut Stage

The first,second and third infill adjustments have been carried out in Sanan development area before high water cut stage.Aiming at the whole block,and based on the combination of material balance principle and Logisitic cycle theory,research on the determination methods for reasonable production/injection ratio has been done: first,determine the relation between pressure buildup velocity and underground injection/production fluids volume difference with the application of material balance method;second,determine the quantitative relation between annual production and annual injection at different water cut;third,research on the relation between pressure buildup velocity and injection/production ratio and water cut.With the application of this method,the reasonable production/injection ratio for Sanan development area during the "10th 5 Year Plan" is determined.Field practice proves that this method can provide the oilfield development adjustments with better guide.