三相旋流器对三元复合驱高黏度采出液适应性研究

Study on the adaptability of three-phase cyclone to produced liquid with high viscosity in ASP flooding

目前水驱三相旋流器对三元复合驱采出液的适应性较差,随着采出液黏度的增加,三相旋流器的分离效率快速下降,为原油集输带来诸多不利影响。为解决三相旋流器在三元复合驱区块上应用不足这一问题,首先,利用CFD软件对原始三相旋流器模型(Hy-0)进行数值模拟和结构优选;然后,通过室内实验确定了Hy-1、Hy-2两种三相旋流器操作参数的适用范围,发现Hy-2三相旋流器具有较高的固相分离效率和较低的压力损失;最后,通过现场试验验证了Hy-2三相旋流器在现场应用中的可行性。现场应用发现,Hy-2三相旋流器液相出口混合介质中20μm以下的砂粒含量小于0.08%,分离效率大于40%;20μm以上的砂粒分离效率为100%。Hy-2三相旋流器具有工艺简单、分离效率高的优点,可有效延长清淤周期,节能降耗作用明显,是一项应用前景广阔的新技术。

At present,the three-phase cyclone of the water flooding has poor adaptability to the produced liquid in ASP flooding.With the increase of viscosity of produced liquid,the separation efficiency of the three-phase cyclone decreases rapidly,which results in harmful effect for the crude oil gathering and transportation.In order to overcome the shortage of application of three-phase cyclone in ASP flooding area,several researches have been carried out.Firstly,the numerical simulation and structural optimization of original three-phase cyclone model(Hy-0)have been conducted by CFD software.Secondly,the application scope of operating parameters of two kinds of threephase cyclones(Hy-1,Hy-2)has been determined in the laboratory,of which the Hy-2 three-phase cyclone has higher solid separation efficiency and lower pressure loss than the other.At last,the feasibility of Hy-2 threephase cyclone has been verified according to the field test.In the field application,the sand content with the size below 20μm is less than 0.08%in the liquid phase outlet mixed medium of Hy-2 three-phase cyclone,with separation efficiency higher than 40%,and the separation efficiency of sand whose size bigger than 20μm is 100%.Hy-2 three-phase cyclone not only has the advantage of simple process and high separation efficiency;but also effectively prolongs the period of desilting,with the obvious effect of saving energy and reducing consumption,which is a new technology with broad application prospect.