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    Volume 31 Issue 3
    May  2006
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    Article Navigation >  Earth Science  > 2006  >  31(3): 378-383
    JU Bin-shan, FAN Tai-liang, WANG Xiao-dong, ZHANG Jin-chuan, 2006. Mathematical Simulation of the Effect of the Change in Oil Viscosity on Water Drive Performance. Earth Science, 31(3): 378-383.
    Citation: JU Bin-shan, FAN Tai-liang, WANG Xiao-dong, ZHANG Jin-chuan, 2006. Mathematical Simulation of the Effect of the Change in Oil Viscosity on Water Drive Performance. Earth Science, 31(3): 378-383.
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    Mathematical Simulation of the Effect of the Change in Oil Viscosity on Water Drive Performance

    • Received Date: 2005-12-13
    • Publish Date: 2006-05-25
      Abstract
    • The increase of crude oil viscosity can affect the production performance of oil fields when they are flooded by injection water. To study this effect, oil viscosity was analyzed statistically and its increase model was regressed. Based on the three-dimensional and three-phase black-oil model, a new mathematical model considering the change of oil viscosity caused by other factors besides formation pressure was developed. The model was discretized by the finite-difference method and solved by the LSOR (line successive over relaxation) method. A new numerical simulator written in Fortran 90 codes was developed. An oil field example of changes in oil viscosity is studied using the numerical simulator, and the changes in oil viscosity and their effects on water drive performance were studied and compared with the results given by a normal simulator. The result shows that oil recovery (water-cut arrives to 98%) decreases from 44. 80% to 34. 29% when the viscosity factor increases from 0 to 0. 02 if the initial viscosity ratio of water to oil is 1 : 10. The recovery predicted by current commercial oil reservoir simulators that neglect the increase in oil viscosity with water-cut rising is higher than true recovery.

       

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