New Insights Into Polymer Rheology in Porous Media

Seright, R.S.; Fan, Tianguang; Wavrik, Kathryn; Balaban, Rosângela de Carvalho

doi:10.2118/129200-pa

Cited by 170 publications

(103 citation statements)

References 29 publications

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“…A large number of investigations have been conducted to study the impact of polymer concentrations, shear rate, temperature, salt concentration, HPAM hydrolysis degree, and hardness on the solution viscosity as the main rheological property of HPAM solutions [5,7,[15][16][17][18][19][20][21][22][23]. Some researchers have undertaken a number of experimental investigations to examine the performance of Hydrophobically Associating Polyacrylamide (HAPAM) [24] and HPAM/Cr(III) [25] to improve the performance of HPAM components in EOR.…”

Section: +mentioning

confidence: 99%

Efficient estimation of hydrolyzed polyacrylamide (HPAM) solution viscosity for enhanced oil recovery process by polymer flooding

Rostami

Kalantari-Meybodi

Karimi

et al. 2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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Abstract. Polymers applications have been progressively increased in sciences and engineering including chemistry, pharmacology science, and chemical and petroleum engineering due to their attractive properties. Amongst the all types of polymers, partially Hydrolyzed Polyacrylamide (HPAM) is one of the widely used polymers especially in chemistry, and chemical and petroleum engineering. Capability of solution viscosity increment of HPAM is the key parameter in its successful applications; thus, the viscosity of HPAM solution must be determined in any study. Experimental measurement of HPAM solution viscosity is time-consuming and can be expensive for elevated conditions of temperatures and pressures, which is not desirable for engineering computations. In this communication, Multilayer Perceptron neural network (MLP), Least Squares Support Vector Machine approach optimized with Coupled Simulated Annealing (CSA-LSSVM), Radial Basis Function neural network optimized with Genetic Algorithm (GA-RBF), Adaptive Neuro Fuzzy Inference System coupled with Conjugate Hybrid Particle Swarm Optimization (CHPSO-ANFIS) approach, and Committee Machine Intelligent System (CMIS) were used to model the viscosity of HPAM solutions. Then, the accuracy and reliability of the developed models in this study were investigated through graphical and statistical analyses, trend prediction capability, outlier detection, and sensitivity analysis. As a result, it has been found that the MLP and CMIS models give the most reliable results with determination coefficients (R 2 ) more than 0.98 and Average Absolute Relative Deviations (AARD) less than 4.0%. Finally, the suggested models in this study can be applied for efficient estimation of aqueous solutions of HPAM polymer in simulation of polymer flooding into oil reservoirs.

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Section: +mentioning

confidence: 99%

Efficient estimation of hydrolyzed polyacrylamide (HPAM) solution viscosity for enhanced oil recovery process by polymer flooding

Rostami

Kalantari-Meybodi

Karimi

et al. 2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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“…Finally, the salt hardness and concentration may affect the rheological properties of the solution if the polymer is charged (which is the case for HPAM) (Sorbie 1991). As shown by Seright (2011), the salt concentration in the injected polymer slug can lead to Newtonian-like behavior deep into the reservoir. Under these circumstances, the flow is likely Newtonian in a significant portion of the reservoir.…”

Section: The Newtonian Framework In Eormentioning

confidence: 99%

Polymer Flow Through Porous Media: Numerical Prediction of the Contribution of Slip to the Apparent Viscosity

et al. 2017

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 18221 Abstract The flow of polymer solutions in porous media is often described using Darcy's law with an apparent viscosity capturing the observed thinning or thickening effects. While the macroscale form is well accepted, the fundamentals of the pore-scale mechanisms, their link with the apparent viscosity, and their relative influence are still a matter of debate. Besides the complex effects associated with the rheology of the bulk fluid, the flow is also deeply influenced by the mechanisms occurring close to the solid/liquid interface, where polymer molecules can arrange and interact in a complex manner. In this paper, we focus on a repulsive mechanism, where polymer molecules are pushed away from the interface, yielding a so-called depletion layer in the vicinity of the wall. This depletion layer acts as a lubricating film that may be represented by an effective slip boundary condition. Here, our goal is to provide a simple mean to evaluate the contribution of this slip effect to the apparent viscosity. To do so, we solve the pore-scale flow numerically in idealized porous media with a slip length evaluated analytically in a tube. Besides its simplicity, the advantage of our approach is also that it captures relatively well the apparent viscosity obtained from core-flood experiments, using only a limited number of inputs. Therefore, it may be useful in many applications to rapidly estimate the influence of the depletion layer effect over the macroscale flow and its relative contribution compared to other phenomena, such as nonNewtonian effects.

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“…Its availability in large quantities, variety in molecular weight and degree of hydrolysis (DH), and low cost promote its wide use in oil-recovery processes. [6][7][8] HPAM is a water-soluble polyelectrolyte with negative charges along its chain. 9,10 The negative charges increase its viscosity.…”

Section: Introductionmentioning

confidence: 99%

“…The high viscosity increases reservoir sweep efficiency, thereby enhancing oil recovery. 6,7 Most studies on the use of HPAM as polymer flooding material focused on enhancing the rheological properties of the polymer, which is essential for recovering large quantities of crude oil. The rheological properties of HPAM in polymer flooding in EOR are strongly influenced by the injection flow rate, molecular weight of polymer, reservoir temperature, salinity of brine, and geological properties of reservoir.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of highly stable ultrahigh-molecular-weight partially hydrolyzed polyacrylamide for enhanced oil recovery

Choi

Chung

et al. 2015

Macromol. Res.

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Polymers used in the polymer flooding technique for enhanced oil recovery (EOR) should improve rheological properties of water phase to improve sweep efficiency so that they are more widely applicable for use in oil fields. This study aimed to determine the molecular weight of a novel polymer, partially hydrolyzed polyacrylamide (HPAM), and to explore the effects of rheological properties of the polymer solution on its performance in EOR. The polymer was synthesized through vinyl polymerization using acrylic acid and acryl amide. To evaluate HPAM, several methods are used in this study. Field flow fractionation revealed that it had ultrahigh molecular weight (UHMW; 7.330×10 6 Da absolute weight-average molecular weight). Results of rheological measurement showed that UHMW HPAM could be applied even at a concentration of 1000 ppm to achieve desired properties. Furthermore, UHMW HPAM showed viscoelastic behavior within a wide range of temperatures and salinities. Polymer flooding with UHMW HPAM recovered 4% more oil because of its high viscosity and molecular weight.

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New Insights Into Polymer Rheology in Porous Media

Cited by 170 publications

References 29 publications

Efficient estimation of hydrolyzed polyacrylamide (HPAM) solution viscosity for enhanced oil recovery process by polymer flooding

Efficient estimation of hydrolyzed polyacrylamide (HPAM) solution viscosity for enhanced oil recovery process by polymer flooding

Polymer Flow Through Porous Media: Numerical Prediction of the Contribution of Slip to the Apparent Viscosity

Evaluation of highly stable ultrahigh-molecular-weight partially hydrolyzed polyacrylamide for enhanced oil recovery

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