泡点压力

所设计的模型以较小的误差比较准确地确定了原油泡点压力下的体积系数。

The designed SVR model can also accurately identify the oil formation volume factor under bubble point pressure in a smaller error .

保持地层压力在泡点压力以上。

And ( 4 ) the formation pressure should be kept above the bubble point pressure .

低于拟泡点压力阶段，产气量增大，采收率增加缓慢。

At the stage of pressure lower than pseudo-bubble point , gas production increases rapidly , while recovery increases slowly .

对48个极性和非极性体系的预测总体结果如下：MUNIFAC-PR模型对这些体系的泡点压力和汽相组成预测平均偏差分别为4.07%、3.53%；

For 48 polar and non-polar systems , the mean deviations of the calculation of bubble-pressure and vapor composition are 4.07 % and 3.53 % by using UNIFAC-PR model , respectively .

在此之前注水，保持油层压力在泡点压力的87%以上，能够实现油田注入水少，综合含水率低，采出程度高。

If water injection is running before reservoir pressure declines to point pressure and reservoir pressure is keeping more than 87 % of point pressure , the oilfield development will need less injection of water and get low total water cut and more recovery .