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• W3036598459 abstract "Polymer viscoelastic solution is the non-Newtonian fluid and widely used in oil production. In the process of seepage, the mechanism of the polymer solution with different molecular coil dimensions (Dh) flooding on remaining oil is unknown. By using the dynamic light scattering instrument, the molecular coil dimension of the polymer solution is tested. By using the HAAKE rheometer, the creep recovery test data of the polymer solution under the same creep time condition are obtained. The effects of polymer solutions with different Dh on residual oil are observed, by using the visible pore model. The results show that the higher the molecular weight ( M w ) of the polymer, the larger the size of the molecular coil dimension. The elasticity characteristics of the polymer solution are sensitive to the molecular coil dimension. As Dh of polymer molecules becomes larger, the contribution of the elastic portion to the viscosity of the polymer solution increases. The higher the M w of polymer is, the longer the molecular chain is and the size of Dh is larger. On the condition of the polymer solution with different M w with 2.5 g/L, when Dh is between 320.0 nm and 327.8 nm, the ratio of the elastic part in the apparent viscosity exceeds the proportion of the viscous part, and the polymer solution composition after these data can be used as a comparative study of elasticity for residual oil use. In the visible pore model, the pore-throat ratio is 3.5, the E R of water flooding is 54.26%, the E R of the polymer solution with Dh = 159.7 nm is 75.28%, and the increase of E R is 21.02% than that of water flooding. With the increase of Dh to 327.8 nm, the final E R of the experimental polymer solution is 97.82%, and the increase of E R of the polymer solution than that of water flooding is 43.56%. However, in the model with a pore-throat ratio of 7.0 and the same polymer solution with Dh = 327.8 nm, the increase of E R of the polymer solution is only 10.44% higher than that of water flooding. The effect of the polymer solution with the same Dh is deteriorated with the increase of the pore-throat ratio." @default.
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• W3036598459 date "2020-06-22" @default.
• W3036598459 modified "2023-10-15" @default.
• W3036598459 title "Relationship between the Molecular Coil Dimension and the Energy Storage Modulus of Polymer Solution Configured with Oilfield-Produced Sewage" @default.
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• W3036598459 doi "https://doi.org/10.1155/2020/2538521" @default.
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