【Key words】 thin layer; viscous crude oil; sand production; horizontal well; wire wrapped screen; foam acidizing; screw pump; emulsifying to reduce viscosity
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氮气泡沫分流酸化 nitrogen foam diversion acidizing
Foam acidizing has selection, which can block high-permeable formation and water formation. Acid can be diverted into low-permeable formation and oil formation.
泡沫酸化具有选择性,能封堵高渗层和水层,使酸液进入中低渗透层和油层,控制酸化后含水的上升;气体的膨胀有助于残酸返排,对产层伤害少。
参考来源 - 河口低渗油藏泡沫酸分流酸化技术研究与应用·2,447,543篇论文数据，部分数据来源于NoteExpress
泡沫酸化用于碳酸盐储层，因为它与正常酸相比反应速度较慢而且防滤失性能较好。
Foam acidizing is used on carbonate reservoirs, because it is more retarded and has better fluid-loss control than normal acid.
泡沫流体在储层酸化中起着重要作用。
The foam fluid plays an important role in reservoir acidification.
通过对泡沫分流调研和理论研究，建立了考虑气体圈闭变化的泡沫分流酸化有效相对渗透率模型；
The function of gas relative permeability in the present of foam account for the effect and the change of trapped-gas is established;
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