Flow of hydrophobically associating polymers through unconsolidated sand pack: Role of extensional rheology and degree of association

Chissonde, Salomao; Azad, Madhar Sahib; Trivedi, Japan

doi:10.1016/j.molliq.2021.117643

Cited by 9 publications

(4 citation statements)

References 42 publications

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“…Hydrophobically associating polymer [8][9][10], as a new type of water-soluble polymer with a small number of hydrophobic groups introduced into the macromolecular chain of the polymer, has become one of the hot spots in the research of polymer materials in the past 30 years. With the deepening of research and the practice verification, it has successfully applied in the pilot test and large-scale application of EOR in oilfield chemical flooding, and has excellent potential in EOR application [11][12][13]. At present, many studies on the synthesis and salt resistance of hydrophobically associating polymers with different molecular structures have been reported.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and salt resistance of non-ionic polymer P (AM/ APEG400/NVP/SM)

Tian,

Shi,

Zhang

et al. 2024

Preprint

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The non-ionic hydrophobic associative copolymer AANS was synthesized by micellar polymerization using acrylamide (AM), allyl polyoxyethylene ether (APEG400), N-vinyl pyrrolidone (NVP) and stearyl methacrylate (SM) as raw materials, 2, 2'-azobis (2-methylpropionamidine) dihydrochloride (V50) as initiator, sodium dodecyl sulfate (SDS) as surfactant. The temperature resistance, salt resistance and rheological properties of the polymer were tested by viscometer and rheometer. The change of polymer microstructure in salt solution was analyzed by scanning electron microscopy. The viscosity test results showed that when the polymer concentration was higher than CAC, the polymer solution exhibited good salt resistance and presented good salt thickening performance. The effect of temperature on the salt resistance of polymer solution showed different rules. With the increase in temperature, the resistance of the polymer to NaCl decreased gradually, while the resistance of the polymer to CaCl2 increased first and then decreased. The resistance of the polymer to CaCl2 showed a special temperature response. Viscoelastic and shear tests showed that the polymer possessed more robust resistance to extreme sodium chloride concentration than extreme calcium chloride concentration. Electron microscopy analysis suggested that the microstructure of the polymer gradually became dense and compact in the salt solution. The results showed that this novel non-ionic hydrophobically associating polymer possessed potential application value in ultra-high salinity reservoirs.

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Section: Introductionmentioning

confidence: 99%

Synthesis and salt resistance of non-ionic polymer P (AM/ APEG400/NVP/SM)

Tian,

Shi,

Zhang

et al. 2024

Preprint

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“…11 This viscoelastic effect has been associated with a reduction of residual oil saturation below the levels attained with viscous liquid flooding, thereby increasing oil recovery. [12][13][14][15][16] The positive effects of deformation thickening are hampered by mechanical degradation, which occurs as polymer molecules experience high-deformation rates while traversing pumps, flow lines, constrictions, valves, and reservoirs. 10 The deformation rate experienced as the polymer solution flows through the reservoir rock is in the range of 50,000 to 100,000 s À1 in regions close to the injection wells.…”

Section: Introductionmentioning

confidence: 99%

“…This behavior can be associated with a change in polymer conformation, resulting in highly extended polymer configurations and large extensional stresses 11 . This viscoelastic effect has been associated with a reduction of residual oil saturation below the levels attained with viscous liquid flooding, thereby increasing oil recovery 12–16 …”

Section: Introductionmentioning

confidence: 99%

Effect of silicon dioxide nanoparticles on the rheology properties of fresh and mechanically degraded hydrolyzed polyacrylamide polymer solutions

Mora,

Hutin,

Avendano

et al. 2024

J of Applied Polymer Sci

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Partially hydrolyzed polyacrylamide is extensively utilized in enhanced oil recovery operations. However, its efficacy is compromised by mechanical degradation during transport through injection lines, valves, and reservoir, which leads to a reduction in the average molecular weight, diminishing the solution's viscosity and viscoelastic properties, critical for efficient oil displacement. In this investigation, we characterized the degree of mechanical degradation in HPAM solutions by evaluating shear and extensional rheological parameters preand post‐degradation. Mechanical degradation was induced by subjecting them to controlled flow through a valve featuring varying degrees of constriction and flow rates. Our results demonstrate a significant reduction in zero‐shear viscosity and high‐strain extensional viscosity of mechanically degraded solutions, with reductions of up to 64%. To mitigate this issue, we explored the incorporation of silica nanoparticles as a potential remedy for mechanical degradation. These nanoparticles strengthen the network structure of HPAM, thereby reducing its susceptibility to mechanical degradation. Our findings reveal that shear and extensional viscosities of mechanically degraded NPs‐HPAM solutions experienced only minimal reductions, dropping to 12% and 0%, respectively. This underscores the effectiveness of the nanoparticle‐enhanced HPAM solutions in preserving viscosity and viscoelasticity under mechanical stress, presenting a promising avenue for improving the robustness of EOR processes.

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“…These include polymer solutions [ 14 ], colloids [ 15 ], and suspensions of rigid particles [ 13 , 16 ]. As a general rule, this phenomenon may appear in the presence of dissolved or suspended molecules/micelles/particles showing an associative behaviour [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Shear Viscosity Overshoots in Polymer Modified Asphalts

2022

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Polymer modification is one of the most common methods for improving the performance of asphalt binders. Despite in-depth research, the structural modifications induced by polymers are still not well understood. In this work, steady shear viscosity measurements and cryo-scanning electron microscopy (cryo-SEM) were used to better understand the internal structure of asphalts modified by styrene-butadiene-styrene with and without sulfur as a crosslinking agent, asphalts modified by polyphosphoric acid (PPA), and quaternary asphalt blends modified by SBS, sulfur, and PPA. The results showed that polymer and asphaltenes collaborate, thus SBS forms a three-dimensional network strengthened by asphaltenes clusters. The strength, extension, and physical nature of such a network is revealed by the appearance of overshoots in the viscosity curves. Moreover, the indirect information deduced from the magnitude and shape of the shear viscosity curves successfully correlated with direct observations of the internal structure by cryo-SEM. Steady shear viscosity is thus recommended as a useful tool in studying the structural development of asphalts modified by different technologies.

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Flow of hydrophobically associating polymers through unconsolidated sand pack: Role of extensional rheology and degree of association

Cited by 9 publications

References 42 publications

Synthesis and salt resistance of non-ionic polymer P (AM/ APEG400/NVP/SM)

Synthesis and salt resistance of non-ionic polymer P (AM/ APEG400/NVP/SM)

Effect of silicon dioxide nanoparticles on the rheology properties of fresh and mechanically degraded hydrolyzed polyacrylamide polymer solutions

Shear Viscosity Overshoots in Polymer Modified Asphalts

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