The effect of cations on gelation of cross-linked polymers

Mostafa SEDAGHATZADEH, Khalil SHAHBAZI, Peyman POURAFSHARY, Seyed Ali RAZAVI

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of different cation concentrations and types on rheological property and stability of Guar, Xanthan, and Partially Hydrolyzed Polyacrylamide (HPAM) cross-linked gels were analyzed through experiments. Also, a new approach was developed to reduce the negative effects of cation by application of multi-walled carbon nano-tubes (MWCNTs). The presence of cations in cross-linked gel system will reduce the viscosity of gel, the higher the cation concentration is, the lower the viscosity will be. The bivalent cation has a greater viscosity reduction effect on gel than monovalent cation. The stability of cross-linked gels is worse with cations, this situation becomes more serious under higher salinity. MWCNTs were added to HPAM gel, cross-linked by (3-Aminopropyl) triethoxysilane (APTES), they surrounded cations and removed them from polymers and reduced the reaction possibility. This method enhances the viscosity and breakdown pressure of cross-linked gels, improves the stability of HPAM cross-linked gel under different operating conditions, and can be applied to related drilling projects.

Original languageEnglish
Pages (from-to)826-832
Number of pages7
JournalPetroleum Exploration and Development
Volume46
Issue number4
DOIs
Publication statusPublished - Aug 1 2019

Keywords

  • cation
  • cross-linked polymer
  • gel system
  • multi-walled carbon nano-tubes
  • rheological property
  • stability

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Energy Engineering and Power Technology
  • Geology
  • Geochemistry and Petrology
  • Economic Geology

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