Effect of nano-silica and curing conditions on the reaction rate of class G well cement exposed to geological CO2-sequestration conditions

Yeon Jong Jeong, Kwang Soo Youm, Tae Sup Yun

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Chemical reactions of class G oil well cement submerged in CO2-saturated brine were experimentally investigated to evaluate the effects of nano-silica and curing conditions. The progression of depths of reaction zones (depletion, carbonation, and degradation zone) with reaction time up to 62 days were quantitatively measured based on 3D X-ray CT in conjunction with the chemical analysis. The results show that there were no significant difference in the progress of carbonation zone regardless of the curing conditions and nano-silica. The measure of reaction depth for tested specimens concludes that the curing at the high pressure and temperature is more effective to prevent the depletion zone from progressing into the cement interior than the addition of the nano-silica, supported by XRD and NMR results. Image-based measurements, coupled with chemical analyses, quantified the evolution of the reactive zones in the oil well cement, providing insights into the underlying reaction mechanism.

Original languageEnglish
Pages (from-to)208-216
Number of pages9
JournalCement and Concrete Research
Volume109
DOIs
Publication statusPublished - 2018 Jul 1

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Silicon Dioxide
Reaction rates
Curing
Cements
Oil wells
Carbonation
Silica
Interiors (building)
Chemical reactions
Nuclear magnetic resonance
Degradation
X rays
Chemical analysis
Temperature
brine

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Materials Science(all)

Cite this

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abstract = "Chemical reactions of class G oil well cement submerged in CO2-saturated brine were experimentally investigated to evaluate the effects of nano-silica and curing conditions. The progression of depths of reaction zones (depletion, carbonation, and degradation zone) with reaction time up to 62 days were quantitatively measured based on 3D X-ray CT in conjunction with the chemical analysis. The results show that there were no significant difference in the progress of carbonation zone regardless of the curing conditions and nano-silica. The measure of reaction depth for tested specimens concludes that the curing at the high pressure and temperature is more effective to prevent the depletion zone from progressing into the cement interior than the addition of the nano-silica, supported by XRD and NMR results. Image-based measurements, coupled with chemical analyses, quantified the evolution of the reactive zones in the oil well cement, providing insights into the underlying reaction mechanism.",
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Effect of nano-silica and curing conditions on the reaction rate of class G well cement exposed to geological CO2-sequestration conditions. / Jeong, Yeon Jong; Youm, Kwang Soo; Yun, Tae Sup.

In: Cement and Concrete Research, Vol. 109, 01.07.2018, p. 208-216.

Research output: Contribution to journalArticle

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