Imperial College London
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ProfessorAnnMuggeridge

Faculty of Engineering, Department of Earth Science & Engineering

Consul for Faculty of Engineering and the Business School
 
 
 
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Contact

 

+44 (0)20 7594 7379a.muggeridge Website

 
 
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Location

 

2.38BRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Tai:2020:10.3997/2214-4609.202035068,
author = {Tai, I and Muggeridge, A and Giddins, MA},
doi = {10.3997/2214-4609.202035068},
title = {Modified peaceman correction for improved calculation of polymer injectivity in coarse grid numerical simulations},
url = {http://dx.doi.org/10.3997/2214-4609.202035068},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - An improved method for calculating the injectivity of non-Newtonian polymers in finite volume, numerical simulation is presented. Non-Newtonian rheologies can significantly impact the performance of a polymer flood. This is especially important in the near wellbore region and at the start of injection. In the near well bore region velocities and shear rates are at a maximum and change rapidly with distance from the well. These effects are expected to be highest at the beginning of a polymer flood due to the near-wellbore region being saturated with more viscous oil. An analytical method for calculating the modified Peaceman pressure equivalent radius when the well block contains only polymer solution is derived and then extended to the case when the well block contains both oil and polymer solution (as occurs at early time). This is done using fractional flow theory to derive well pseudo relative permeability functions. The approach is validated by comparing the results from fine grid radial and coarse grid Cartesian simulation models. The importance of the correction is demonstrated by simulating polymer injection into a realistic field scale model of a viscous oil field. The modified Peaceman radius, combined with well pseudo relative permeabilities, significantly reduces the error when calculating the bottomhole flowing pressure in wells injecting a shear-thinning polymer solution. In the field scale simulation, with injection pressure constrained by the fracture pressure of the rock, our results show that polymer injection can be a viable technique for enhanced oil recovery in this reservoir. The new method leads to higher well injectivity and more optimistic prediction of polymer flood performance, compared to the standard Peaceman calculation used by most reservoir simulators, where non-Newtonian behaviour in the well block is unaccounted for. This paper provides a simple and accurate method to capture the impact of shear thinning behaviour on polymer injectiv
AU  - Tai,I
AU  - Muggeridge,A
AU  - Giddins,MA
DO  - 10.3997/2214-4609.202035068
PY  - 2020///
TI  - Modified peaceman correction for improved calculation of polymer injectivity in coarse grid numerical simulations
UR  - http://dx.doi.org/10.3997/2214-4609.202035068
ER  -
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