Development of Correlations To Predict Biopolymer Mobility in Porous Media

Hejri, Shahab; Willhite, G.P.; Green, D.W.

doi:10.2118/17396-pa

Cited by 27 publications

(21 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There was a tendency for the viscosity of the HPAM to increase at a certain apparent shear rate. This tendency by Cannella et al, [7], Hejri et al, [24], Teeuw and Hesselink, [25]. The results presented here are in good agreement with those reported in the literature.…”

Section: Evaluation Of Apparent Viscosity Over Shear Rates For Sand Psupporting

confidence: 93%

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

Tahir¹,

Hincapie²,

Be³

et al. 2017

WJET

View full text Add to dashboard Cite

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.

show abstract

Section: Evaluation Of Apparent Viscosity Over Shear Rates For Sand Psupporting

confidence: 93%

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

Tahir¹,

Hincapie²,

Be³

et al. 2017

WJET

View full text Add to dashboard Cite

show abstract

“…Consistent with previous literature (Cannella et al 1988, Hejri et al 1991, Fig. 2 confirms that xanthan solutions show shear-thinning or pseudoplastic behavior in porous media.…”

Section: Xanthansupporting

confidence: 91%

“…With an original basis in a capillary bundle model of porous media, many previous researchers used the correlating parameter, u/(φk) 0.5 , or a modification thereof (Hirasaki and Pope 1974, Chauveteau 1982, Durst et al 1982, Duda et al 1983, Heemskerk et al 1984, Cannella et al 1988, Wreath et al 1990, Hejri et al 1991, Seright 1991.…”

Section: Xanthanmentioning

confidence: 99%

“…At moderate to high fluid velocities in porous media, xanthan solutions show shear thinning that closely follows xanthan's viscosity behavior (Chauveteau 1982, Cannella et al 1988, Hejri et al 1991, Seright et al 2009a. However, at low velocities in short cores, the literature (Cannella et al 1988, Hejri et al 1991, Seright et al 2009a reported that xanthan continues to show shear thinning, whereas viscosity data predicts Newtonian behavior (first Newtonian region of the Carreau model). Because most oil is displaced at low velocities, resolution of this discrepancy is needed for accurate representation of xanthan resistance factors when simulating chemical flooding processes.…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

New Insights into Polymer Rheology in Porous Media

Seright

Fan

Wavrik

et al. 2010

SPE Improved Oil Recovery Symposium

View full text Add to dashboard Cite

This paper clarifies the rheology of xanthan and HPAM solutions in porous media, especially at low velocities. Previous literature reported resistance factors (effective viscosities in porous media) and an apparent shear thinning at low fluxes that were noticeably greater than expected from viscosity measurements. The polymer component that causes the latter behavior is shown to propagate quite slowly and generally will not penetrate deep in a formation. Particularly for HPAM solutions, this behavior can be reduced or eliminated for solutions that experience mechanical degradation and/or flow through a few feet of porous rock. Under practical conditions where HPAM is used for enhanced oil recovery, the degree of shear thinning is slight or non-existent, especially compared to the level of shear thickening that occurs at high fluxes.

show abstract

“…Different authors (Bird et al, 1960;Vogel and Pusch, 1981;Chauveteau and Zaitoun, 1981;Chauveteau, 1982;Greaves and Patel, 1985;Willhite and Uhl, 1986;Cannella et al, 1988;Kolodziej, 1988;Willhite and Uhl, 1988;Hejri et al, 1991) have proposed different expressions to relate shear rate to the porous medium bulk properties, however, with the exception of Vogel and Pusch who used the Carreau model, the power law model is the most common choice. Sorbie (1991) summarized these attempts.…”

Section: Non-newtonian Fluid Behaviourmentioning

confidence: 99%