交替式注入泡沫复合驱实验研究

针对孤岛油田中二中Ng3-4聚合物驱后油藏条件,通过物模手段研究了交替式注入泡沫复合驱的特征及驱油能力.长细管实验表明,交替式注入泡沫复合驱,低气液比时模型两端的封堵压差上升缓慢,交替周期越大封堵效果越差.非均质模型驱油实验表明,泡沫复合驱主要是通过扩大波及体积来提高采收率,在与聚合物驱相同注入量条件下,其封堵能力是聚合物驱的2倍.

Alternate Injection Foam Combination Flooding Experiment

In this paper the character of polym er-surfactant foam combination flooding of alternate injection is studied with physical model test under the reservoir condition of central part of Block 2 in central Gudao Oilfield. The long slim tube test shows that at low gas liquid ratio, the blocking pressure difference between inlet and outlet of slim tube increases more slowly and the bigger alternate slug is, the worse the block effect. The oil displacement test on heterogeneous porous model shows that EOR of polymer-surfactant foam combination flooding mainly depended on increasing sweep volume, at the same injection volume, its blocking ability is twice bigger than polymer flooding.