Microstructure of a Type G Oil Well Cement-Nanosilica Blend

作者: Andrew Griffin , Jung J. Kim , Muhammad K. Rahman , Mahmoud M. Reda Taha

DOI: 10.1061/(ASCE)MT.1943-5533.0001124

关键词: SilicateComposite materialElastic modulusCuring (chemistry)Materials sciencePozzolanCementOil wellCalcium silicate hydrateNanoindentation

摘要: AbstractMotivated by the need to improve oil well integrity for potential carbon capture and storage through CO2 sequestration, nanosilica was hypothesized capable of improving quality cement (OWC) in medium deep wells. In this study, OWC mixed with 1 3% weight produce pastes water binder ratio (w/b) 0.45. The specimens were cured under high temperature pressure, simulating what occurs A method analysis combining Si29 nuclear magnetic resonance (NMR) nanoindentation is proposed. results are compared observations extracted from which classification hydration products based on elastic modulus different categories calcium silicate hydrate (C-S-H). show that degree hydration, reactivity, polymerization increase elevated curing condition ambient condition. It seems C-S-H generated pozzolanic...

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