Polymer-cement composites with adhesion and re-adhesion (healing) to casing capability for geothermal wellbore applications

Kenton A. Rod, Carlos A. Fernandez, Manh Thuong Nguyen, James B. Gardiner, Nicolas J. Huerta, Vassiliki Alexandra Glezakou, Tamas Varga, Roger Rousseau, Phillip K. Koech

Research output: Contribution to journalArticle

Abstract

Deterioration of cement/casing adhesion in wellbore scenarios can result in unwanted and potentially harmful leakage with the potential of serious repair costs. In this work, the authors explore the use of self-healing polymers added to conventional wellbore cements as a way to bring about self-healing and readhering (to casing) properties to the composite. Self-healing capability was demonstrated by permeability analysis showing that polymer-cement composites reduce flow by 50–70% at cement bulk and at the cement/steel interface. Use of atomistic simulations imply that these polymers have good wetting properties on the steel surfaces. Interactions between steel/polymer and cement/polymer are complementary, resulting in a wider range of bonding patterns. Cracks seem to expose under-coordinated sites that result in more bonding interactions, which agrees well with the permeability measurements showing high degree of healed cracks and cement-steel interfacial gaps together with an overall increased in structural integrity of these advanced polymer-cement composite materials.

Original languageEnglish
Article number103490
JournalCement and Concrete Composites
Volume107
DOIs
Publication statusPublished - Mar 2020

Keywords

  • Bond strength
  • Cement-casing
  • Composite
  • Geothermal
  • Oil well cement
  • Polymers

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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    Rod, K. A., Fernandez, C. A., Nguyen, M. T., Gardiner, J. B., Huerta, N. J., Glezakou, V. A., Varga, T., Rousseau, R., & Koech, P. K. (2020). Polymer-cement composites with adhesion and re-adhesion (healing) to casing capability for geothermal wellbore applications. Cement and Concrete Composites, 107, [103490]. https://doi.org/10.1016/j.cemconcomp.2019.103490