Abstract
Inclusion of nanoparticles (NPs) into oil field cement improves key cement properties. Nevertheless, large-scale application of NPs suffers from high cost and lack of proper dispersion of commercial NPs. This work develops easy-to-scale, field-applicable methods to grow NPs within cement slurries starting from inexpensive water-soluble precursors. Three methods for preparing CaSO4, CaCO3 and Fe(OH)3 NPs are presented. Results showed that Fe(OH)3 NPs induced the highest increase in compressive strength, outperforming commercial NPs. Triaxial tests showed that the Fe(OH)3 NPs enhanced cured cement durability and resistance to fatigue. Moreover, Fe(OH)3 NPs led to significant reductions in porosity and permeability.
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