西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (2): 125-130.

• 石油与天然气工程 • 上一篇    下一篇

一种改进的聚合物驱孔隙网络模型

孙传宗1,姜汉桥1,侯健2   

  1. 1. 中国石油大学(北京)石油工程教育部重点实验室,北京昌平1022492. 中国石油大学(华东)石油工程学院,山东东营257061
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-04-01 发布日期:2012-04-01

An Improved Pore Network Model of Polymer Flooding

Sun Chuanzong1, Jiang Hanqiao1, Hou Jian2   

  1. 1. MOE Key Lab of Petroleum Engineering,China University of Petroleum,Changping,Beijing 102249,China2. School of Petroleum Engineering,China University of Petroleum,Dongying,Shandong 257061,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-04-01 Published:2012-04-01

摘要: 基于幂律流体在圆管中的流动模型,建立了幂律流体剪切率与流速之间的关系式。对关系式进行校正并代入
Carreau 模型中,得到了改进的Carreau 流体有效黏度模型。新模型中有效黏度是流速的函数,将原来的非线性问题简
化为线性问题。应用新建立的有效黏度模型,综合考虑聚合物渗流机理建立聚合物驱微观模拟模型。进行了聚合物
驱微观模拟,统计分析了聚合物驱后剩余油的微观分布规律。计算结果表明,聚合物驱后剩余油更趋分散:网络状剩
余油体积比例明显减少,但油水混合状、孤粒/孤滴状、斑块状剩余油体积比例都有所提高。

关键词: 网络模型, 聚合物驱, 渗流机理, 剩余油, 滞留

Abstract: Based on the flow rate formula of power-law fluid in the tube,the relationship between shear rate and flow rate
was established. The improved effective viscosity model of Carreau fluid in the tube was derived by submitting the corrected
relationship into the Carreau model. In the new model,the effective viscosity is the function of flow rate. The original nonlinear
equations are simplified as linear equations. Applying the new effective viscosity model,the microscopic simulation model for
polymer flooding is provided together with polymer seepage mechanism. Through the microscopic simulation,laws of remaining
oil after polymer flooding are statistically analyzed. Microscopic simulation shows that the retained oil of network shape
decreases significantly while the volume ratio of single grain/island shape,fleck shape and oil-water mixed shape increases.

Key words: network model, polymer flooding, seepage mechanism, remaining oil, retention

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