黏弹性流体在尺寸渐变型微观孔道流动规律研究

Study on the Flow Law of Viscoelastic Fluid in Gradient Size Micro Pore

随着国民经济的快速发展,为满足对于石油产品的大量需求,油田对于三次采油技术进行了积极的探索,聚合物溶液驱油作为一种有效地提高采收率手段得到了广泛的应用和迅速的发展。建立了黏弹性流体流动的微观孔道模型;采用上随体Maxwell本构模型;运用POLYFLOW有限元流体力学软件对模型进行求解;得到了模型的有关速度等值线、流函数分布图;分析了松弛时间、流量、孔喉比对于微观波及效率的影响。

With the rapid development of the national economy, in order to meet the huge demand for oil products, people have carried out the positive exploration for the tertiary oil recovery technology. As an effective EOR method, polymer solution flooding is widely used and has rapid development. In this article, a micro-pore viscoelastic fluid flow model was established; The upper-convected Maxwell constitutive model and the finite element fluid dynamics software POLYFLOW were used to solve the model; the velocity contour maps and stream function of the model were obtained; the influence of the relaxation time, flow and entrance width of the microscopic sweep efficiency was analyzed.