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 • Previous Articles     Next Articles

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

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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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