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Journal of Chemistry
Volume 2013, Article ID 675826, 5 pages
http://dx.doi.org/10.1155/2013/675826
Research Article

Study on Properties of Branched Hydrophobically Modified Polyacrylamide for Polymer Flooding

1State Key Laboratory of Oil & Gas Reservoir and Exploitation Engineering, Southwest Petroleum Institute, Chengdu 610500, China
2College of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
3Institute of Xinjiang Oilfield Company, Karamayi, Xinjiang 834000, China

Received 4 April 2013; Accepted 19 August 2013

Academic Editor: Ibnelwaleed Ali Hussien

Copyright © 2013 Lei-Ting Shi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effect of partially hydrolyzed polyacrylamides (HPAMs) used for polymer flooding is unsatisfactory under the conditions of high temperature and high salinity. In order to improve the viscosifying ability of HPAM, branched macromolecular skeleton monomer is used to change the linear backbone structure. A new branched hydrophobically modified polyacrylamide (BHMPAM) was synthesized by the free radical copolymerization of functionalized branched macromolecular skeleton monomer, acrylamide (AM), acrylic acid (AA), and hydrophobic monomer hexadecyl-allyl-dimethyl ammonium chloride (C16DMAAC). The properties of polymer solution were characterized; the results of the experiments showed that BHMPAM exhibited the properties of pseudoplastic fluid, and the viscosity of BHMPAM was 345.9 mPa·s (polymer concentration was 1750 mg/L) under the condition of 75°C and 9374 mg/L of salinity. Moreover, BHMPAM also performed well in viscoelasticity which can meet the property requirements for EOR polymer.