Flow Characteristics of Viscoelastic Polymer Solution in Expansion Micro-Pores of Different Pore-Throat Ratio

Abstract:

Pore-throat ratio is a significant parameter expressing the characteristics of reservoir pores. It has an apparent influence on viscoelastic polymer solution flow in micro-pores. In this paper, Upper-Convected Maxwell (UCM) equation is applied in describing the viscoelastic polymer behavior. The expansion channel models of different pore-throat ratio are selected in process of simulation. And contours of stream function and velocity of different Weissenberg number (We) are calculated and drawn by Finite Volume Method. Results show that, vortex will occur at the re-entrant corner caused by the sudden expansion of channel, size and intensity of the corner recirculation vortex. The residual oil region is reduced and the mobile oil region is enlarged. Microscopic sweep efficiency is increased relatively. Vortex will be larger and stronger, and the velocity will be increased for We. Vortex will be lager as the bigger pore-throat ratio. Micro-sweep efficiency will be capitalized by viscoelastic polymer solution to the utmost.

• Periodical: Applied Mechanics and Materials (Volumes 268-270)
• Pages: 1119-1122
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.268-270.1119
• Online since: December 2012
• Authors: Jing Fu
• Keywords: Expansion Channel, Micro-Sweep Efficiency, Polymer Solution, Upper-Convected Maxwell Model (UCM), Viscoelastic Behavior

References

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