Experimental Evaluation of Models for Calculating Shear Rates of Polymer Solution In Porous Media

2014 ◽  
Author(s):  
Wenjie Sun ◽  
Kewen Li
Keyword(s):  
Porous Media ◽  
Polymer Solution ◽  
Experimental Evaluation ◽  
Shear Rates

scholarly journals Effect of Non-Newtonian Flow on Polymer Flooding in Heavy Oil Reservoirs

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1225 ◽  
Author(s):  
Xiankang Xin ◽  
Gaoming Yu ◽  
Zhangxin Chen ◽  
Keliu Wu ◽  
Xiaohu Dong ◽  
...  
Keyword(s):  
Porous Media ◽  
Polymer Solution ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Flow Behavior ◽  
Polymer Flooding ◽  
Oil Reservoirs ◽  
Flow In Porous Media ◽  
Newtonian Flow ◽  
Heavy Oil Reservoirs

The flow of polymer solution and heavy oil in porous media is critical for polymer flooding in heavy oil reservoirs because it significantly determines the polymer enhanced oil recovery (EOR) and polymer flooding efficiency in heavy oil reservoirs. In this paper, physical experiments and numerical simulations were both applied to investigate the flow of partially hydrolyzed polyacrylamide (HPAM) solution and heavy oil, and their effects on polymer flooding in heavy oil reservoirs. First, physical experiments determined the rheology of the polymer solution and heavy oil and their flow in porous media. Then, a new mathematical model was proposed, and an in-house three-dimensional (3D) two-phase polymer flooding simulator was designed considering the non-Newtonian flow. The designed simulator was validated by comparing its results with those obtained from commercial software and typical polymer flooding experiments. The developed simulator was further applied to investigate the non-Newtonian flow in polymer flooding. The experimental results demonstrated that the flow behavior index of the polymer solution is 0.3655, showing a shear thinning; and heavy oil is a type of Bingham fluid that overcomes a threshold pressure gradient (TPG) to flow in porous media. Furthermore, the validation of the designed simulator was confirmed to possess high accuracy and reliability. According to its simulation results, the decreases of 1.66% and 2.49% in oil recovery are caused by the difference between 0.18 and 1 in the polymer solution flow behavior indexes of the pure polymer flooding (PPF) and typical polymer flooding (TPF), respectively. Moreover, for heavy oil, considering a TPG of 20 times greater than its original value, the oil recoveries of PPF and TPF are reduced by 0.01% and 5.77%, respectively. Furthermore, the combined effect of shear thinning and a threshold pressure gradient results in a greater decrease in oil recovery, with 1.74% and 8.35% for PPF and TPF, respectively. Thus, the non-Newtonian flow has a hugely adverse impact on the performance of polymer flooding in heavy oil reservoirs.

An experimental evaluation of non-Darcian flow in porous media

1978 ◽  
Vol 38 (3-4) ◽  
pp. 231-241 ◽  
Author(s):  
J.P. Soni ◽  
Nurul Islam ◽  
P. Basak
Keyword(s):  
Porous Media ◽  
Experimental Evaluation ◽  
Flow In Porous Media

Research on Rheological Behavior of Polyacrylamide Solution Seepage Flow in Porous Medium

2013 ◽  
Vol 807-809 ◽  
pp. 2523-2528
Author(s):  
Yu Fei Jia ◽  
Miao Xu ◽  
Xiao Xiao Liu
Keyword(s):  
Porous Media ◽  
Pressure Drop ◽  
Molecular Mass ◽  
Polymer Solution ◽  
Effective Viscosity ◽  
Mass Concentration ◽  
Seepage Flow ◽  
Relative Molecular Mass ◽  
Darcy Velocity ◽  
Solution Changes

Polyacrylamide (polymer) solution which has different relative molecular mass and mass concentration in porous media has been studied in seepage flow experiment. Due to differences in pressure drop at different seepage velocities, the effective viscosities of different polymer solutions are calculated. Rheological behaviors of polymer solution changes in different mass concentration and relative molecular mass in porous media are analyzed. It is indicated that in the range of Darcy seepage velocity, acceleration is increasing during the process of pressure drop on both sides of core is resulted from the increase of flow rate during percolation, its effective viscosity first decreased, then increased with the increases of shear rate at range of Darcy velocity. Higher the relative molecular mass and mass concentration lead greater the effective viscosity.

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