空气泡沫流体垂直管注入特征实验研究

Experimental Study on the Air-foam Fluid Characteristics in Vertical Tube

基于空气泡沫驱现场操作中注入参数设计的理论依据不足进行研究。首先设计了垂直管泡沫注入模拟实验装置，实验装置考虑了不同管径对泡沫流体剪切的影响，着重观测了泡沫流体沿程压力变化规律。结果表明泡沫流体垂直管注入流动中泡沫流体符合假塑性幂律模式，剪切速率在0～1．3s-1的范围时，随着剪切速率的增加，剪切应力在不断增加；剪切速率超过1．3s-1后，剪切应力增加趋势不再明显；依据此结论可以进行泡沫流体注入参数设计。

Research is based on insufficiency theoretical basis of injection parameter design in air foam flooding. First, designed the vertical tube foam injection simulation experiment device which considered the effects of different diameter and combination of pipe on foam fluid shear, emphatically observed the change law of pressure along the process of foam fluid. The results show that the foam fluid flow in vertical tube is accordance with pseudoplastic power law model. When the shear rate is 0 - 1.3 s- 1, with the increase of the shear rate, the shear stress increased, if more than 1.3 s- 1, the shear stress is no longer increased. The parameter design can based on this conclusion.