Seepage Flow and Well Test Model for Viscous-Elastic Polymer#br#
Flooding Reservoir

doi:10.11885/j.issn.1674-5086.2014.02.23.02

Abstract

Abstract:

The rheological behaviors of high molecular polyacrylamide（HPAM）solution in porous media and rheometer were
measured in experiments，which demonstrated the existence of viscoelasticity in polymer flooding process，and it complied with
non-Newtonian power-law seepage pattern within the scope of medium shear rate（0.1～100.0 s−1）. Based on the established
viscous-elastic constitutive equation related to varying cross-section throat model，effective viscosity of polymer solution was
expressed as the sum of shear viscosity and elastic viscosity，the mathematical model for transient flow in viscous-elastic polymer
flooding reservoir was established and solved by finite difference method to acquire numerical solution，then dimensionless
well test curves were developed. The effect of viscoelasticity on the shape of well test curves for viscous-elastic polymer flooding
reservoir was then discussed，by comparing theoretical with realistic well test curves. The results show that the existence
of elasticity causes significant rise of formation pressure near polymer-injection well，but hardly changes the shape of well test
curves. Therefore，it is feasible to ignore the effect of elasticity and acquire parameters by adopting well test models based on
non-Newtonian power-law flow for viscous-elastic polymer flooding reservoir.

Key words: polymer flooding, non-Newtonian, viscoelasticity, seepage flow, well test

CLC Number:

TE343

LIANG Guangyao1*, SHEN Pingping1, LIAO Xinwei2, LIU Shangqi1, CHEN Heping1. Seepage Flow and Well Test Model for Viscous-Elastic Polymer#br# Flooding Reservoir[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2014.02.23.02.

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Seepage Flow and Well Test Model for Viscous-Elastic Polymer#br# Flooding Reservoir

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