Stability analysis of a granite-based geopolymer sealant for CO2 geosequestration: In-situ permeability and mechanical behavior while exposed to brine

Hajiabadi, Seyed Hasan; Khalifeh, Mahmoud; van Noort, Reinier

doi:10.1016/j.cemconcomp.2024.105511

Cement and Concrete Composites

2024

DOI: 10.1016/j.cemconcomp.2024.105511

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Stability analysis of a granite-based geopolymer sealant for CO2 geosequestration: In-situ permeability and mechanical behavior while exposed to brine

Seyed Hasan Hajiabadi,

Mahmoud Khalifeh,

Reinier van Noort

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Spacer Fluids for Use With Rock-Based Geopolymer

Khalili,

Khalifeh,

Saasen

et al. 2024

ASME Open Journal of Engineering

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Developing a spacer fluid compatible with geopolymers and capable of facilitating effective mud displacement becomes imperative when considering the utilization of geopolymers as a complete substitute for cement in oil and gas well cementing. Drilling fluid contamination can impair the properties of geopolymer essential for zonal isolation. This study aims to design a spacer fluid tailored for geopolymer by first adjusting its rheological properties using rheology additives such as xanthan gum (XG), polyanionic cellulose (PAC), and bentonite to maintain viscosity hierarchy and aid in better mud removal. Followingly, the surfactant content in the spacer is adjusted to ensure its ability to clean the static mud layer on the surfaces and water-wet them, ultimately improving the geopolymer bonding. Lastly, the degree of compatibility of the optimized spacer and geopolymer was determined by examining the rheological properties, and compressive and tensile strength of the geopolymer when intermixing happens. These two fluids showed rheological compatibility based on the calculated R-index, an index frequently used in the petroleum industry for determining fluid compatibility. However, the gel strength was high for 25/75 geopolymer/spacer mixture. Solid to water and granite to ground granulated blast-furnace slag (GGBFS) ratio of the hardening spacer affected the degree of curing compatibility, aligning with the sensitivity of geopolymer to variations in GGBFS and water content. Heat evolution of the geopolymer showed that excessive water can hinder the dissolution of the aluminosilicate phase and later the geopolymerization reaction.

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Spacer Fluids for Use With Rock-Based Geopolymer

Khalili,

Khalifeh,

Saasen

et al. 2024

ASME Open Journal of Engineering

View full text Add to dashboard Cite

show abstract

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Stability analysis of a granite-based geopolymer sealant for CO2 geosequestration: In-situ permeability and mechanical behavior while exposed to brine

Cited by 1 publication

References 88 publications

Spacer Fluids for Use With Rock-Based Geopolymer

Spacer Fluids for Use With Rock-Based Geopolymer

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