Synergetic effects of PVP/HEC polymers on rheology and stability of polymeric solutions for enhanced oil recovery at harsh reservoirs

mellei, Akbar Sabzian; Madadizadeh, Ali; Riahi, Siavash; Kaffashi, Babak

doi:10.1016/j.petrol.2022.110619

Cited by 6 publications

(8 citation statements)

References 33 publications

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“…Hence, the addition of PVP in the system will lead to an intensification of the physical and chemical interactions, thereby having impact on the rheological characteristics of the systems. As the PVP ratio in the blend increased from 5 to 30 wt.%, the blends exhibited an enhancement of the rheological properties, revealing the role of PVP as a polymeric stabilizer, due to the strong polarity and hydrophilic properties [ 57 , 58 ]. Consequently, the different and complex rheological behavior can be explained by taking into account the synergism between the structural characteristics of both HPMC and PVP, which in turn depends on the packing efficiency and specific interactions.…”

Section: Resultsmentioning

confidence: 99%

Bioactive Materials Based on Hydroxypropyl Methylcellulose and Silver Nanoparticles: Structural-Morphological Characterization and Antimicrobial Testing

Filimon¹,

Onofrei²,

Bargan³

et al. 2023

Polymers

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The progress achieved in recent years in the biomedical field justifies the objective evaluation of new techniques and materials obtained by using silver in different forms as metallic silver, silver salts, and nanoparticles. Thus, the antibacterial, antiviral, antifungal, antioxidant, and anti-inflammatory activity of silver nanoparticles (AgNPs) confers to newly obtained materials characteristics that make them ideal candidates in a wide spectrum of applications. In the present study, the use of hydroxypropyl methyl cellulose (HPMC) in the new formulation, by embedding AgNPs with antibacterial activity, using poly(N-vinylpyrrolidone) (PVP) as a stabilizing agent was investigated. AgNPs were incorporated in HPMC solutions, by thermal reduction of silver ions to silver nanoparticles, using PVP as a stabilizer; a technique that ensures the efficiency and selectivity of the obtained materials. The rheological properties, morphology, in vitro antimicrobial activity, and stability/catching of Ag nanoparticles in resulting HPMC/PVP-AgNPs materials were evaluated. The obtained rheological parameters highlight the multifunctional roles of PVP, focusing on the stabilizing effect of new formulations but also the optimization of some properties of the studied materials. The silver amount was quantified using the spectroscopy techniques (energy-dispersive X-ray fluorescence (XRF), energy-dispersive X-ray spectroscopy (EDX)), while formation of the AgNPs was confirmed using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), and dynamic light scattering (DLS). Also, the morphological examination (Atomic Force Microscopy (AFM) and Scanning electron microscopy (SEM)) by means of the texture roughness parameters has evidenced favorable characteristics for targeted applications. Antibacterial activity was tested against Escherichia coli and Staphylococcus aureus and was found to be substantially improved was silver was added in the studied systems.

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Section: Resultsmentioning

confidence: 99%

Bioactive Materials Based on Hydroxypropyl Methylcellulose and Silver Nanoparticles: Structural-Morphological Characterization and Antimicrobial Testing

Filimon¹,

Onofrei²,

Bargan³

et al. 2023

Polymers

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“…The stability of charged polymers, such as HPAM, depends among other factors upon the electrostatic repulsion between the chain molecules, and therefore, the addition of salts reduces the repulsive force. In this scenario, the polymer shrinks and loses its structure, leading to the decrease in viscosity . The addition of nanoparticles in the polymer solution enhanced the polymeric structure by forming the ion–dipole interaction that ensures that no cation impairs the carbonyl group of the polymer, as illustrated by Figure .…”

Section: Influence Of Chemical Structures In Fluid–fluid and Fluid–ro...mentioning

confidence: 99%

“…In this scenario, the polymer shrinks and loses its structure, leading to the decrease in viscosity. 100 The addition of nanoparticles in the polymer solution enhanced the polymeric structure by forming the ion−dipole interaction that ensures that no cation impairs the carbonyl group of the polymer, as illustrated by Figure 10.…”

Section: Salt Tolerance Enhancementmentioning

confidence: 99%

Nanoparticle-Assisted Surfactant/Polymer Formulations for Enhanced Oil Recovery in Sandstone Reservoirs: From Molecular Interaction to Field Application

Mmbuji,

Cao,

et al. 2023

Energy Fuels

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There has been some success with polymer and surfactant injections into depleted sandstone reservoirs for reducing residual oil saturation and improving oil recovery. However, their microemulsion stability is compromised in the harsh conditions of high temperature and salinity. Nanoparticle addition to the polymers and surfactant has resulted in a nanofluid with more stability, improved rheological behaviors, reduced adsorption loss, and much more as a result of the synergistic effects of their components. In this work, the performance of polymeric and surfactant nanofluids and the factors that impair their efficacy were highlighted. Numerous surfactant adsorption mechanisms, such as ion pairing, ion exchange, hydrogen bonds, dipole interactions, and hydrophobic interactions, on the rock surface were illustrated. Synergistic interactions of ternary phases of surfactant, polymer, and nanoparticles to the interfacial tension reduction, wettability alteration, adsorption reduction, rheological enhancement, and nanofluid stability for enhanced oil recovery were also presented. Additionally, the prevailing challenges and their plausible interventions have been highlighted in this review. The summarized results from published papers based on experimental evidence and theoretical deductions presented in this review will uplift the understanding of the screening, designing, and formulation of nanofluids.

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“…The mechanical shear rate, along with high reservoir temperature and salinity, affects the rheology in terms of viscosity of polymers. As the flow behavior of the displacing fluid plays a vital role in drilling and flooding operation, it becomes imperative to regulate the viscosity of cellulose ethers under specific salinity and temperature conditions, especially with high shear rates. ,− …”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Alkali Solution to Activate Diethyl Carbonate for Improving Rheological Properties of Modified Hydroxyethyl Methyl Cellulose

Abbas,

Tunio,

Memon

et al. 2024

ACS Omega

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The applications of cellulose ethers in the petroleum industry represent various limitations in maintaining their rheological properties with an increase in both concentration and temperature. This paper proposed a new method to improve the rheological properties of hydroxyethyl methyl cellulose (HEMC) by incorporating diethyl carbonate (DEC) as a transesterification agent and alkali base solutions. Fourier transform infrared (FTIR) analysis confirmed the grafting of both composites onto the HEMC surface. The addition of sodium hydroxide (NaOH) improved the stability of the polymeric solution as observed from ζ-potential measurement. Shear viscosity and frequency sweep experiments were conducted at concentrations of 0.25–1 wt % at ambient and elevated temperatures ranging from 80–110 °C using a rheometer. In the results, the increase in viscosity at specific times and temperatures indicated the activation of DEC through the saponification reactions with alkali solutions. All polymeric solutions exhibited shear-thinning behavior and were fitted well by the Cross model. NaOH-based modified solution exhibited low shear viscosity compared to the DEC-HEMC solution at ambient temperature. However, at 110 °C, its viscosity exceeded that of the DEC-HEMC solution due to the activation of DEC. In frequency sweep analysis, the loss modulus (G″) was greater than the storage modulus (G′) at lower frequencies and vice versa at higher frequencies. This signifies the viscoelastic behavior of modified solutions at 0.50 wt % and higher concentrations. The flow point (G′ = G″) shifted to a low frequency, indicating the increasing dominance of elastic behavior with the rising temperature. At 110 °C, the NaOH-based modified solution exhibited both viscous and elastic behavior, confirming the solution’s thermal stability and flowability. In conclusion, modified HEMC solution was found to be effective in controlling viscosity under ambient conditions, enhancing solubility, and improving thermal stability. This modified composite could play a significant role in optimizing viscoelastic properties and fluid performance under challenging wellbore conditions.

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Synergetic effects of PVP/HEC polymers on rheology and stability of polymeric solutions for enhanced oil recovery at harsh reservoirs

Cited by 6 publications

References 33 publications

Bioactive Materials Based on Hydroxypropyl Methylcellulose and Silver Nanoparticles: Structural-Morphological Characterization and Antimicrobial Testing

Bioactive Materials Based on Hydroxypropyl Methylcellulose and Silver Nanoparticles: Structural-Morphological Characterization and Antimicrobial Testing

Nanoparticle-Assisted Surfactant/Polymer Formulations for Enhanced Oil Recovery in Sandstone Reservoirs: From Molecular Interaction to Field Application

Effect of Temperature and Alkali Solution to Activate Diethyl Carbonate for Improving Rheological Properties of Modified Hydroxyethyl Methyl Cellulose

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