塔河一区三叠系下油组油藏含水上升规律分析与预测

Analysis and prediction of water cut rising law of Triassic lower reservoir in 1block of Tahe oilfield

摘要: 根据三种含水上升基本模式的描述方程判断塔河一区油藏的含水上升模式为S型;根据水驱理论确定了适合塔河一区油藏的童氏标准图版,预测了塔河一区油藏最终采收率;根据分流方程与相渗理论推导出塔河一区油藏含水率和含水上升率与采出程度的关系式。实践表明,对于塔河一区油藏,当采出程度大于19%后,童氏标准图版理论预测含水率和含水上升率都与实际情况高度吻合。

Abstract: According to the equations describing the three basicpatterns of water cut rising,the water cut rising mode of 1block in Tahe oilfield belongs to S type.Based on the theory of water drive,Tong's standard chart suitable for 1 block in Tahe oilfield is determined,which predicts the ultimate recovery in1 block of Tahe.On the basis of distribution equation and the relative permeability,the relation between the water cut rising rate,water cut and recovery degree is deduced.The practice shows that in 1 block of Tahe area,when the recovery degree is more than 19%,Tong's standard chart theory predicting the water cut and water cut rising rate,which are highly consistent with actual situation.