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Energies 2016, 9(12), 1037; doi:10.3390/en9121037

Shear Resistance Properties of Modified Nano-SiO2/AA/AM Copolymer Oil Displacement Agent

1,2,* , 1
,
1
and
1
1
School of Chemistry and Chemical Engineering of Southwest Petroleum University, Chengdu 610500, China
2
Faculty of Engineering and Applied Science, University of Regina, Regina, SK S4S 0A2, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Alireza Bahadori
Received: 7 October 2016 / Revised: 7 October 2016 / Accepted: 22 November 2016 / Published: 9 December 2016
(This article belongs to the Special Issue Oil and Gas Engineering)
View Full-Text   |   Download PDF [4278 KB, uploaded 9 December 2016]   |  

Abstract

To address the problem regarding poor shear resistance of commonly employed polymers for oil displacement, modified nano-SiO2/AA/AM copolymer (HPMNS) oil displacement agents were synthesized using acrylic acid (AA), acrylamide (AM), and modified nano-SiO2 of different modification degrees as raw materials. HPMNS was characterized by means of infrared spectroscopy (IR), nuclear magnetic resonance (1H-NMR, 13C-NMR), dynamic/static light scattering, and scanning electron microscope. A comparative study of the shear resistance properties for partially hydrolyzed polyacrylamide (HPAM) and HPMNS was conducted. Compared to HPAM, the introduced hyperbranched structure endowed HPMNS with good shear resistance, which was quantified from the viscosity retention ratio of the polymer solutions. From the perspective of rheological property, HPMNS also showed great shear stability after shearing by a Mixing Speed Governor and porous media shear model. Furthermore, with a higher degree of modification, HPMNS-2 had better shear stability in terms of viscosity and rheological property than HPMNS-1. The phenomena were due to its lower hydrodynamic radius, weight-average molecular weight, and better flexibility of its molecular chains. In addition, upon the indoor displacement test, the resistance factor and residual resistance factor values of HPMNS-2 were higher than those of HPAM. This behavior is beneficial for increasing oil recovery. View Full-Text
Keywords: the modified nano-SiO2/AA/AM copolymer; modification degrees; shear resistance; rheological property; enhanced oil recovery the modified nano-SiO2/AA/AM copolymer; modification degrees; shear resistance; rheological property; enhanced oil recovery
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MDPI and ACS Style

Lai, N.; Guo, X.; Zhou, N.; Xu, Q. Shear Resistance Properties of Modified Nano-SiO2/AA/AM Copolymer Oil Displacement Agent. Energies 2016, 9, 1037.

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