数值模拟黏弹性聚合物溶液在突扩收缩孔道中的流动特征  

Numerical simulation of the flow characteristic of viscoelastic polymer solution in abruptly expanding-suddenly contracting channel

作　　者：钟会影[1] 周洪亮 尹洪军[1] 谢锐[3] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]大庆榆树林油田有限责任公司,黑龙江大庆151100 [3]大庆油田有限责任公司第四采油厂,黑龙江大庆163310

出　　处：《西安石油大学学报（自然科学版）》2011年第1期54-57,119,共4页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金项目"高浓度黏弹性聚合物在微观孔隙中的驱油机理研究"(编号:50874023)

摘　　要：三次采油技术的实践表明,聚合物驱技术既能扩大波及系数,又能提高驱油效率.为了从理论上清楚地认识黏弹性聚合物溶液的微观渗流特征,提出了用同位有限体积法对黏弹性聚合物溶液在简化油藏微观孔道模型中的流动特征进行数值模拟,建立了黏弹性聚合物溶液在突扩收缩流道内流动的数学模型,利用有限体积方法对数学模型进行离散求解,得到了流函数、速度、压力和第一法向应力差等值线图,并引入一个无量纲量(We)来表示黏弹性的大小.计算结果表明,聚合物溶液随着其黏弹性的增强,微观波及效率在不断增大.The practice of tertiary oil recovery shows that the polymer flooding can both enlarge the sweep efficiency and enhance the displacement efficiency.The numerical simulation of the flow characteristic of viscoelastic polymer solution flow in simplified reservoir channel model is carried by using non-staggered grid finite volume method.The mathematical model for the flow of viscoelastic polymer solution in abruptly expanding-suddenly contracting channel is established,and it is discretely solved by finite volume method.The stress contour stream function,velocity,pressure and first normal stress difference contours are obtained,and a dimensionless quantity We is adopted to indicate the viscoelasticity of the polymer solution.The results show that the stronger the viscoelasticity is,the higher the micro sweep efficiency is.

关 键 词：黏弹性溶液 突扩突缩流道 流动特征 数值模拟 

分 类 号：TE327[石油与天然气工程—油气田开发工程]