Russian Journal of Applied Chemistry

, Volume 90, Issue 3, pp 480–491 | Cite as

Synthesis and rheological property of various modified nano-SiO2/AM/AA hyperbranched polymers for oil displacement

  • Nanjun Lai
  • Shitao Li
  • Lu Liu
  • Yanxiang Li
  • Jun Li
  • Maoyue Zhao
Various Technological Processes


In this study, various modified nano-SiO2 functional monomers (nano-SiO2-KH540-MAH) were prepared and reacted with acrylamide (AM) and acrylate (AA) to synthesize a water-soluble hyperbranched copolymer (nano-SiO2/AM/AA) for medium- and low-permeability reservoirs and heterogeneous reservoirs by using the redox free-radical polymerization strategy. The HCl‒CH3CH2OH titration expectedly demonstrated that the monomers underwent a controlled modification. The copolymers were characterized by a series of experiments, including IR, 1H NMR and DLS methods. Furthermore, it was shown that, compared with the rheological properties of various modified copolymers, Polymer-40 has a better viscosity and elasticity due to the better molecular structure. An indoor displacement test demonstrated that the mobility control ability and the EOR ability had a favorite relationship with rheology. The RF, RRF and EOR of Polymer-40 were higher than the same parameters of other modified copolymers.


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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • Nanjun Lai
    • 1
  • Shitao Li
    • 1
  • Lu Liu
    • 1
  • Yanxiang Li
    • 1
  • Jun Li
    • 1
  • Maoyue Zhao
    • 1
  1. 1.College of Chemistry and Chemical EngineeringSouthwest Petroleum UniversityChengduP. R. China

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