Effect of porous media properties on the onset of polymer extensional viscosity

Zamani, Nematollah; Bondino, Igor; Kaufmann, Roland; Skauge, Arne

doi:10.1016/j.petrol.2015.06.025

Cited by 42 publications

(39 citation statements)

References 38 publications

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“…In addition to polymer properties, porous media may also significantly influence the generation of extensional flow, as shown by several experimental [25] and numerical studies [67]. Due to variation in cross-sectional area along its propagation path, polymer molecules are forced to accelerate and decelerate.…”

Section: Porous Media Propertiesmentioning

confidence: 99%

“…Seeing that polymer molecules are able to rotate in pore space, molecules are not strained and effective viscosity is only controlled by shear. In contrast, if molecules are exposed to strain for sufficient time, molecule deformation plays a major role and effective viscosity will be defined by strain [25,[67][68][69][70][71][72].…”

Section: Porous Media Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

Skauge

Zamani

Jacobsen

et al. 2018

Colloids and Interfaces

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Polymer flooding is one of the most successful chemical EOR (enhanced oil recovery) methods, and is primarily implemented to accelerate oil production by sweep improvement. However, additional benefits have extended the utility of polymer flooding. During the last decade, it has been evaluated for use in an increasing number of fields, both offshore and onshore. This is a consequence of (1) improved polymer properties, which extend their use to HTHS (high temperature high salinity) conditions and (2) increased understanding of flow mechanisms such as those for heavy oil mobilization. A key requirement for studying polymer performance is the control and prediction of in-situ porous medium rheology. The first part of this paper reviews recent developments in polymer flow in porous medium, with a focus on polymer in-situ rheology and injectivity. The second part of this paper reports polymer flow experiments conducted using the most widely applied polymer for EOR processes, HPAM (partially hydrolyzed polyacrylamide). The experiments addressed highrate, near-wellbore behavior (radial flow), reservoir rate steady-state flow (linear flow) and the differences observed in terms of flow conditions. In addition, the impact of oil on polymer rheology was investigated and compared to single-phase polymer flow in Bentheimer sandstone rock material. Results show that the presence of oil leads to a reduction in apparent viscosity.

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Section: Porous Media Propertiesmentioning

confidence: 99%

Section: Porous Media Propertiesmentioning

confidence: 99%

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

Skauge

Zamani

Jacobsen

et al. 2018

Colloids and Interfaces

Self Cite

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show abstract

“…Polymer rheology is controlled through shear force exerted by wall of pores while flowing through porous media [3]. Viscoelastic polymers exhibit shearthinning behavior during rotational rheometry experiments whereas, when flowing through porous media the same polymer solution depicts shear thickening behavior-at a certain medium/high shear rates [4] [5] [6].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Combination of Apparent and Shear Viscoelastic Data during Polymer Flooding for EOR Evaluations

Tahir¹,

Hincapie²,

Be³

et al. 2017

WJET

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We present a comprehensive workflow to obtain the best insights into the viscoelastic behavior of polymers. Viscoelasticity is depicted in most cases by the current commercially available polymers used for EOR applications. The phenomenon is debated to be one of the reasons for additional oil recovery during polymer flooding applications. It is somehow accepted that polymer increases volumetric sweep efficiency owing to improved mobility ratio. Recently researches have explained that flooding polymers in porous media with elastic characteristics could recover additional oil, due to the improved microscale oil displacement (pore-scale). This study focuses on the analysis of polymer viscoelasticity based on single-phase core, sand-pack and capillary tube (CT) experiments coupled with their detailed rheological characterization, in order to evaluate polymer behavior in porous media. A combination of hydrolyzed polyacrylamides (HPAM) polymers as well as a bio polymer is presented throughout this evaluation. The evaluation of the data is addressed on the basis of pressure drop across the pores, separating the shear associated pressure by the extensional thickening associated pressure. Apart from that, viscoelastic dependence of the converging-diverging geometry has been experimented. Based on the observed behavior through porous media, HPAM polymers are compared with bio polymers. Moreover, the behavior of solutions with induced mechanical degradation (pre-sheared) is compared with nonsheared solutions. Similarly, concentrations with different polymer solutions are evaluated. The results obtained in this work allow for additional understanding of polymer solutions behavior in flooding applications. Furthermore The results support the definition of optimized workflows to assess their behavior under flow through porous media. Finally this evaluation helps to describe the parameter that defines polymer viscoelastic properties.

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“…The form of the Reynolds number depends primarily on the rheological model employed to describe the flow curve and the definition of the equivalent diameter used. The most commonly used rheological models include the power law model (Sorbie and Huang 1991), Carreau model (Zamani et al 2015), Bingham model (Attia et al 2016;Chen et al 2005) and Herschel-Bulkley model (Chevalier et al 2013). It needs to be noted that several different definitions of the modified Reynolds number have been proposed in the literature for the power law model.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…4). They were described with the Carreau model, based on which a number of methods had been proposed in the literature for calculating pressure drops occurring during the flow of polymer solutions in porous media (Zamani et al 2015). The Carreau model is expressed with the equation:…”

Section: Rheologymentioning

confidence: 99%

Flow of Emulsions Stabilized by Polymers Through Packed Bed

Różańska

Różański

2019

Transp Porous Med

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In this study, we present the results of measurements of pressure drops during the flow of emulsions stabilized by carboxymethylcellulose sodium salt (NaCMC), xanthan gum (XG) and poly(ethylene oxide) (PEO) through a packed bed of glass spheres. The concentration of dispersed phase ranged from 10 to 50 vol% and consisted of flocculated droplets with diameters much smaller than the pore size. Highly flocculated emulsions with the addition of NaCMC were yield-stress fluids whose flow curve can be described by the Herschel-Bulkley equation. An empirical model was formulated for Herschel-Bulkley fluids which allows predicting pressure losses during their flow through a packed bed. In this model, the friction factor was made dependent on the Reynolds number proposed by Kembłowski and

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Effect of porous media properties on the onset of polymer extensional viscosity

Cited by 42 publications

References 38 publications

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

A Comprehensive Combination of Apparent and Shear Viscoelastic Data during Polymer Flooding for EOR Evaluations

Flow of Emulsions Stabilized by Polymers Through Packed Bed

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