Mechanism of anomalously increased oil displacement with aqueous viscoelastic polymer solutions

Clarke, Andrew; Howe, Andrew M.; Mitchell, Jonathan; Staniland, J. R.; Hawkes, Laurence; Leeper, K.R.

doi:10.1039/c5sm00064e

Cited by 93 publications

(100 citation statements)

References 23 publications

(39 reference statements)

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“…These values are about four times those estimated from the onset of the elastic instability in the cone and plate geometry. They are also much higher than the one reported by Clarke et al, 15 which are of the order of unity or below. This indicates that the effective curvature of the streamlines might be much smaller than the rough estimation used above, 1/w.…”

contrasting

confidence: 48%

“…For real rocks, the usual procedure consists of determining the apparent viscosity using Darcy's law, taking advantage of a characteristic length scale of the rock to define an apparent shear rate. 15,34 This length is typically ffiffiffiffiffi ffi k/ p , where k is the permeability and / the porosity. However, such procedures lead to a shift in the shear rate, when comparing to bulk rheograms.…”

Section: B Global Pressure Dropmentioning

confidence: 99%

“…14 Recently, direct observations of elastic instabilities in two-dimensional models of porous media made using microfluidics have been reported. 15,16 It is shown in these works that the streamlines exhibit fluctuations at high enough flow rates. Above the threshold, the apparent diffusion coefficient is greatly enhanced, 16 the apparent viscosity is increased, 15,17 and some a) Electronic mail: hugues.bodiguel@univ-grenoble-alpes.fr trapped oil droplets are mobilized.…”

Section: Introductionmentioning

confidence: 99%

“…Above the threshold, the apparent diffusion coefficient is greatly enhanced, 16 the apparent viscosity is increased, 15,17 and some a) Electronic mail: hugues.bodiguel@univ-grenoble-alpes.fr trapped oil droplets are mobilized. 15,18 This last consequence is likely to be related to oil field results in Wang,19,20 where additional oil has been recovered using polymer flooding in the semi-dilute regime. Clarke et al proposed that oil mobilization is related to pressure fluctuations, which has been recently confirmed in three-dimensional structures.…”

Section: Introductionmentioning

confidence: 99%

“…This is in apparent contradiction with the extra dissipation due to elastic instabilities found in cone and plate geometry 5 and in porous media. 15,17 In this work, we report a comprehensive study dealing with the flow of shear-thinning polymer solutions in model porous media. The polymer solutions are characterized by classical rheological measurements in cone and plate geometries.…”

Section: Introductionmentioning

confidence: 99%

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Extra dissipation and flow uniformization due to elastic instabilities of shear-thinning polymer solutions in model porous media

et al. 2016

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We study flows of hydrolized polyacrylamide solutions in two dimensional porous media made using microfluidics, for which elastic effects are dominant. We focus on semi-dilute solutions (0.1%-0.4%) which exhibit a strong shear thinning behavior. We systematically measure the pressure drop and find that the effective permeability is dramatically higher than predicted when the Weissenberg number is greater than about 10. Observations of the streamlines of the flow reveal that this effect coincides with the onset of elastic instabilities. Moreover, and importantly for applications, we show using local measurements that the mean flow is modified: it appears to be more uniform at high Weissenberg number than for Newtonian fluids. These observations are compared and discussed using pore network simulations, which account for the effect of disorder and shear thinning on the flow properties. Published by AIP Publishing. [http://dx

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contrasting

confidence: 48%

Section: B Global Pressure Dropmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extra dissipation and flow uniformization due to elastic instabilities of shear-thinning polymer solutions in model porous media

et al. 2016

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Mechanical responses in the length direction and thickness direction of quaternary 1,4‐diazabicyclo‐[2.2.2]‐octane polysulfone alkaline anion‐exchange fuel‐cell membranes

Zhang

Tian

et al. 2019

J of Applied Polymer Sci

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A quaternary 1,4-diazabicyclo-[2.2.2]-octane polysulfone (QDPSU) alkaline anion-exchange fuel-cell membrane was synthesized. Nanoindentation and uniaxial tension methods were used to test the mechanical properties of this membrane in both the thickness direction and length direction at 26 C and 40% relative humidity. We found that the QDPSU membrane exhibited remarkable viscoelastic properties with significant loading rate-dependent behavior and time-dependent behavior (creep-relaxation). The value of compression creep rates and compression relaxation rates of the QDPSU membrane were measured to be about 0.2 by a spherical indenter and changed very little with different holding loads. Compared with Nafion, a most widely used fuel-cell membrane, the QDPSU alkaline anion-exchange membrane showed a better creep resistance. During the nanoindentation fatigue test, the variation of depths with the indentation cycles were divided into a rising primary region, a steady-state secondary region, and a continuous declining region. This was different from the uniaxial tension fatigue test. The cross-scale and cross-direction mechanical study from this work will help provide new evidence for bridging the gap between nanoindentation and uniaxial tensile testing.

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Pore‐Scale Flow Characterization of Polymer Solutions in Microfluidic Porous Media

Browne

Shih

Datta

2019

Small

101

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Polymer solutions are frequently used in enhanced oil recovery and groundwater remediation to improve the recovery of trapped nonaqueous fluids. However, applications are limited by an incomplete understanding of the flow in porous media. The tortuous pore structure imposes both shear and extension, which elongates polymers; moreover, the flow is often at large Weissenberg numbers, Wi, at which polymer elasticity in turn strongly alters the flow. This dynamic elongation can even produce flow instabilities with strong spatial and temporal fluctuations despite the low Reynolds number, Re. Unfortunately, macroscopic approaches are limited in their ability to characterize the pore‐scale flow. Thus, understanding how polymer conformations, flow dynamics, and pore geometry together determine these nontrivial flow patterns and impact macroscopic transport remains an outstanding challenge. This review describes how microfluidic tools can shed light on the physics underlying the flow of polymer solutions in porous media at high Wi and low Re. Specifically, microfluidic studies elucidate how steady and unsteady flow behavior depends on pore geometry and solution properties, and how polymer‐induced effects impact nonaqueous fluid recovery. This work thus provides new insights for polymer dynamics, non‐Newtonian fluid mechanics, and applications such as enhanced oil recovery and groundwater remediation.

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Mechanism of anomalously increased oil displacement with aqueous viscoelastic polymer solutions

Cited by 93 publications

References 23 publications

Extra dissipation and flow uniformization due to elastic instabilities of shear-thinning polymer solutions in model porous media

Extra dissipation and flow uniformization due to elastic instabilities of shear-thinning polymer solutions in model porous media

Mechanical responses in the length direction and thickness direction of quaternary 1,4‐diazabicyclo‐[2.2.2]‐octane polysulfone alkaline anion‐exchange fuel‐cell membranes

Pore‐Scale Flow Characterization of Polymer Solutions in Microfluidic Porous Media

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