Experimental investigation of in situ polymer viscosity in micromodels

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Introduction

Polymer flooding is one of the EOR methods to increase oil recovery by increasing the displacing fluid viscosity, thus improving the oil displacement efficiency. However, due to its non-newtonian behavior, the relation of bulk polymer viscosity in a rotational rheometer with effective porous media viscosity is not fully understood. This work's main objective is to understand polymer flow behavior in porous media such as micromodels concerning the pressure drop that occurs due to shear and elongational deformation of several polymer solutions. In this work, polymer rheology obtained by rotational rheometer should be compared with a microfluidic extensional viscometer-rheometer-on-a-chip (mVROC and eVROC) and micromodels to describe Non-Newtonian behavior of the polymer flow in porous media.

Scope

Based on the above introduction, the proposed thesis should include the following:

  1. Rheology data of specific polymer solutions obtained using rotational rheometer.
  2. Effective viscosity data of specific polymer solutions obtained using mVROC and eVROC and micromodels.
  3. Semi-empirical correlations between bulk and effective viscosity of specific polymer solutions.

References

  • Berg, S., van Wunnik, J. Shear Rate Determination from Pore-Scale Flow Fields. Transp Porous Med 117, 229–246 (2017). https://doi.org/10.1007/s11242-017-0830-3
  • Ober, T.J., Haward, S.J., Pipe, C.J. et al. Microfluidic extensional rheometry using a hyperbolic contraction geometry. Rheol Acta 52, 529–546 (2013). https://doi.org/10.1007/s00397-013-0701-y
  • Hincapie, R.E., 2016. Pore-Scale Investigation of the Viscoelastic Phenomenon during Enhanced Oil Recovery (EOR) Polymer Flooding through Porous Media. Papierflieger Verlag GmbH.