Phenomenological study of the micro- and macroscopic mechanisms during polymer flooding with SiO2 nanoparticles

Santamaria, Oveimar; Lopera, Sergio H.; Riazi, M.R.; Minale, Mario; Cortés, Farid B.; Franco, Camilo A.

doi:10.1016/j.petrol.2020.108135

Cited by 20 publications

(21 citation statements)

References 59 publications

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“…Polymer flooding can greatly improve the oil recovery from waterflooding development oilfields because the higher viscosity of polymer solutions can effectively improve the oil–water mobility ratio, alleviate the conflicts between layers, improve the fluid absorption profile, and enhance displacement [ 1 , 2 , 3 ]. Moreover, the viscoelastic effect of the polymer solution can effectively mobilise the remaining oil after waterflooding, improve the oil displacement efficiency, and significantly increase the oil recovery [ 4 , 5 , 6 , 7 , 8 ]. Presently, the Daqing oilfield is the world’s largest polymer flooding application block.…”

Section: Introductionmentioning

confidence: 99%

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

et al. 2022

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To investigate the impact of polymer viscoelasticity on microscopic remaining oil production, this study used microscopic oil displacement visualisation technology, numerical simulations in PolyFlow software, and core seepage experiments to study the viscoelasticity of polymers and their elastic effects in porous media. We analysed the forces affecting the microscopic remaining oil in different directions, and the influence of polymer viscoelasticity on the displacement efficiency of microscopic remaining oil. The results demonstrated that the greater the viscosity of the polymer, the greater the deformation and the higher the elasticity proportion. In addition, during the creep recovery experiment at low speed, the polymer solution was mainly viscous, while at high speed it was mainly elastic. When the polymer viscosity reached 125 mPa·s, the core effective permeability reached 100 × 10−3 μm2, and the equivalent shear rate exceeded 1000 s−1, the polymer exhibited an elastic effect in the porous medium and the viscosity curve displayed an ‘upward’ phenomenon. Moreover, the difference in the normal deviatoric stress and horizontal stress acting on the microscopic remaining oil increased exponentially as the viscosity of the polymer increased. The greater the viscosity of the polymer, the greater the remaining oil deformation. During the microscopic visualisation flooding experiment, the viscosity of the polymer, the scope of the mainstream line, and the recovery factor all increased. The scope of spread in the shunt line area significantly increased, but the recovery factor was significantly lower than that in the mainstream line. The amount of remaining oil in the unaffected microscopic area also decreased.

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Section: Introductionmentioning

confidence: 99%

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

et al. 2022

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“…To assess the ability of SiO 2 /amine to mitigate the chemical degradation of HPAM solutions due to the presence of different types of ions, viscosity measurements of the HPAM solution at 1100 mg L −1 in each brine were carried out as described below: the nanofluids and the control samples (systems without nanoparticles) were left at 62 °C (reservoir temperature) for 96 h without stirring. Subsequently, the viscosity of the samples was measured at 7.1 s −1 by using a Kinexus-Pro rheometer with a concentric cylinder geometry (Malvern, United Kingdom) and following the method described by Santamaria et al 46 The results were compared with the control samples.…”

Section: Methodsmentioning

confidence: 99%

Effect of Amine-Functionalized Nanoparticles (SiO₂/Amine) on HPAM Stability under Chemical Degradation Environments: An Experimental and Molecular Simulation Study

et al. 2023

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This work aimed to develop SiO 2 nanoparticles functionalized with amine (SiO 2 /amine) to inhibit the chemical degradation of partially hydrolyzed polyacrylamide (HPAM) in the presence of different ionic species through static experiments and molecular simulations. The effect of the SiO 2 /amine on the rheological behavior of HPAM solution was evaluated in the presence of monovalent, divalent, and trivalent cations. To understand the relationships between polymers, ions, and nanostructures, interaction energies and the radii of gyration under all saline scenarios were calculated by molecular dynamics (MD). The SiO 2 /amine was spherical with a size <100 nm. There is a correlation between the ion's valence and the chemical degradation of HPAM: in the presence of polyvalent cations, the viscosity losses of the HPAM solutions reached up to 94%, incorporating SiO 2 /amine at 100 mg L −1 mitigated the viscosity losses by up to 16%. The molecular simulations showed that the self-folding of the HPAM chains increased in brine containing trivalent cations leading to the viscosity loss of the solutions. The presence of SiO 2 /amine increased the radius of gyration of the polymer up to 17%, improving the viscosity of the HPAM solutions. This study opens a broader landscape regarding nanotechnology to improve polymer flooding applied to the oil industry.

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“…The solution used after polymer flooding was prepared with polymers with molecular weights of 25 million and with polymer concentrations of 1500, 2000, and 2500 mg/L. A number 0 rotor was selected at six revolutions per minute; each solution was tested twice, and the average of the test results was taken to reduce the error [ 35 ].…”

Section: Experimental Methodologymentioning

confidence: 99%

Study on Micro Production Mechanism of Corner Residual Oil after Polymer Flooding

et al. 2022

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To study the microscopic production mechanism of corner residual oil after polymer flooding, microscopic visualization oil displacement technology and COMSOL finite element numerical simulation methods were used. The influence of the viscosity and interfacial tension of the oil displacement system after polymer flooding on the movement mechanism of the corner residual oil was studied. The results show that by increasing the viscosity of the polymer, a portion of the microscopic remaining oil in the corner of the oil-wet property can be moved whereas that in the corner of the water-wet property cannot be moved at all. To move the microscopic remaining oil in the corners with water-wet properties after polymer flooding, the viscosity of the displacement fluid or the displacement speed must be increased by 100–1000 times. Decreasing the interfacial tension of the oil displacement system changed the wettability of the corner residual oil, thus increasing the wetting angle. When the interfacial tension level reached 10−2 mN/m, the degree of movement of the remaining oil in the corner reached a maximum. If the interfacial tension is reduced, the degree of production of the residual oil in the corner does not change significantly. The microscopic production mechanism of the corner residual oil after polymer flooding expands the scope of the displacement streamlines in the corner.

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Phenomenological study of the micro- and macroscopic mechanisms during polymer flooding with SiO2 nanoparticles

Cited by 20 publications

References 59 publications

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

Effect of Amine-Functionalized Nanoparticles (SiO₂/Amine) on HPAM Stability under Chemical Degradation Environments: An Experimental and Molecular Simulation Study

Study on Micro Production Mechanism of Corner Residual Oil after Polymer Flooding

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Phenomenological study of the micro- and macroscopic mechanisms during polymer flooding with SiO2 nanoparticles

Cited by 20 publications

References 59 publications

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

Influence of Polymer Viscoelasticity on Microscopic Remaining Oil Production

Effect of Amine-Functionalized Nanoparticles (SiO2/Amine) on HPAM Stability under Chemical Degradation Environments: An Experimental and Molecular Simulation Study

Study on Micro Production Mechanism of Corner Residual Oil after Polymer Flooding

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Effect of Amine-Functionalized Nanoparticles (SiO₂/Amine) on HPAM Stability under Chemical Degradation Environments: An Experimental and Molecular Simulation Study