井下泡沫发生器内流场数值模拟及结构优选

Numerical Simulation and Structural Optimization of Flow Field in Downhole Foam Generator

井下泡沫发生器的应用可以避免泡沫从地面注入井下过程中的消泡问题,改善泡沫驱油的效果。但是由于井下径向空间有限,其内部泡沫发生结构的设计受到诸多因素的限制。应用Fluent软件,对射流挡板式、螺旋挡板式和螺旋搅拌式3种不同的井下泡沫发生结构进行了内部流场的数值模拟,对比分析了流场的迹线、速度分布、气液相分布和压力分布情况。结果表明:螺旋搅拌式发泡结构对气液相的掺混效果较好,压力损失小,为所研究的最佳井下泡沫发生结构。

Application of downhole foam generator can solve the defoaming while injecting the foam downhole from the surface and improve the effect of foam flooding.The downhole’s limited radial space and other factors jointly influence the design of internal foam generator.In this paper,having Fluent software used to simulate internal flow field of three types of downhole foam generators such as jet baffle type,screw baffle type and screw stirring type and having trace line,velocity distribution,gas-liquid distribution and pressure distribution of the flow field compared and analyzed to show that,the spiral-stirred foaming generator has better mixing effect on gas and liquid and less pressure loss.