Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (1): 125-128.doi: 10.3969/j.issn.1673-8926.2012.01.025

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Sensitivity analysis of polymer flooding characteristic parameters on water cut curve

ZHANG Wei，YU Gaoming，HU Haixia，SHI Lihua，ZHANG Xin   

  1. College of Petroleum Engineering， Yangtze University， Jingzhou 434023， China
  • Online:2012-02-20 Published:2012-02-20

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Abstract:

Water cut curve matching is the important part of the history matching of polymer flooding. There are two important fitting points in the water cut curve, which are polymer flooding effective point and water cut lowest point. In the numerous affecting polymer flooding factors, we selected relative viscosity of polymer solution, polymer adsorptive capacity, residual resistance factor and inaccessible pore volume as characteristic parameters for sensitivity analysis, and defined the sensitivity coefficient. Through sensitivity analysis, we know that the values of fitting points reduce with the increase of relative viscosity of polymer solution, residual resistance factor and inaccessible pore volume, but increase with the increase of polymer adsorptive capacity. The sensitivity of polymer flooding characteristic parameters
on water cut curve from strong to weak is: polymer adsorptive capacity, relative viscosity of polymer solution, inaccessible pore volume and residual resistance factor.

Key words: hydrocarbon accumulation, main controlling factors, Middle-Lower Triassic, western Sichuan Depression

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