聚驱开发指标计算数学模型的建立与应用

MATHEMATICAL MODEL FOR CALCULATING PRODUCTION INDEXES OF POLYMER FLOODING AND ITS APPLICATION

综合运用前缘推进理论和经验回归方法 ,建立起一种聚合物驱产量和含水率变化规律的预测模型。在应用该方法计算时 ,假定区块以给定的单位时间产液量生产 ,压力是不断变化的 ,即“定产求压”。应用建立的方法对大庆油田 2 0个聚合物注入区块含水率和产油量变化规律进行了拟合和预测 ,结果表明 ,该方法预测精度较高 ,月产油量平均相对误差在 12 %以内 ,含水率平均相对误差在 3%以内 ,累积产油量平均相对误差在 5 %以内 ,能够满足现场的需要。

On the basis of frontal advance theory,and combining experience regression method,a prediction model for predicting production and water cut changing law is established.We suppose the tracts produced with the given liquid production and pressure varied continuously.The method established is applied to 20 tracts in Daqing Oilfield for predicting production and water cut changing law.Result shows it has higher precision.The average relative error of month production,water cut and accumulate production are lower than 12%,3% and 5% respectively.