Issue 27, 2019, Issue in Progress

Rheological properties of an ultra-high salt hydrophobic associated polymer as a fracturing fluid system

Abstract

Herein, a novel ultra-high salt hydrophobic associated polymer, UUCPAM, was prepared using acrylamide, acrylic acid, 2-acrylamide-2-methyl propane sulfonic acid and the hydrophobic monomer UUC. Polymerization exothermic test results indicated that the increase in the hydrophobic monomer content led to an increase in the exothermic time, which is considerably conducive to the formation of hydrophobic structures. The scanning electron microscopy and transmission electron microscopy studies showed that the polymer had complex network structures and that this phenomenon was considerably obvious in NaCl solution. The fluorescence probe experiment verified that the critical association concentration of this polymer decreased with an increase in the hydrophobic monomer. Rheology studies indicated that the polymer had good temperature and shear resistance in NaCl solution. Moreover, the apparent viscosity of the polymer remained above 80 mPa s when 0.3 wt% UUCPAM was added at 170 s−1 in 20 000 mg L−1 NaCl solution at 90 °C. The storage modulus that indicated strong elasticity increased with an increase in the polymer concentration. Meanwhile, the number of hydrophobic micro-zones increased, thus forming dense network structures. Therefore, the polymer was found to have excellent salt resistance and extensive application prospects.

Graphical abstract: Rheological properties of an ultra-high salt hydrophobic associated polymer as a fracturing fluid system

Supplementary files

Article information

Article type
Paper
Submitted
07 Mar 2019
Accepted
29 Apr 2019
First published
15 May 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 15246-15256

Rheological properties of an ultra-high salt hydrophobic associated polymer as a fracturing fluid system

J. Gao, G. Zhang, L. Wang, L. Ding, H. Shi, X. Lai, X. Wen, S. Ma and C. Huang, RSC Adv., 2019, 9, 15246 DOI: 10.1039/C9RA01725A

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