The numerical results show that with the adaptive passive control, the separation bubble length was reduced to 45% of its original length, and the low total pressure recovery coefficient was improved.
数值结果表明，施加自适应无源被动控制后，分离区长度减小为无控制时的45%，控制区域的总压恢复系数和流场均匀性提高。
The impact of starting pressure gradient must be considered due to existence of starting pressure gradient and recovery difficulty during the development of low permeability oil reservoirs.
低渗透油田由于存在启动压力梯度，开采难度很大，因此，在低渗透油田开发时必须考虑启动压力梯度的影响。
At the stage of pressure higher than bubbling point, the imitated oil shows an elastic characteristic with a very low recovery;
结果显示：（1）高于泡点压力阶段，模拟油显现弹性驱动特征，采收率很低；
The burn tincture has short treatment period and low treatment cost, thus a burn patient has low pressure on economy and mentality, and the patient can recovery fast.
本发明烧伤液治疗周期较短，治疗费用低，烧伤患者经济和心理压力小，有利于患者治疗恢复。
So the mechanism study of surfactant flooding in lowering injection pressure and improving oil recovery is significant to the development of low permeability reservoirs.
因此，研究低渗油藏表面活性剂驱降压增注及提高采收率机理及方法，对有效开发低渗油藏、缓解开发中存在的突出问题具有重要的意义。
So the mechanism study of surfactant flooding in lowering injection pressure and improving oil recovery is significant to the development of low permeability reservoirs.
因此，研究低渗油藏表面活性剂驱降压增注及提高采收率机理及方法，对有效开发低渗油藏、缓解开发中存在的突出问题具有重要的意义。
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