CuO nanoparticles Alkalinity 1 Alkyd resin 1 Aqueous media 1 Bingham-plastic models 1 Bromine compounds 1 Completion fluids 1 Copper oxide nanoparticles 1 Copper oxides 1 FTIR 1 Fluid densities 1 High Pressure and High Temperature conditions 1 High density completion fluid 1 High density completion fluid (HDCF) 1 High pressure and high temperature (HPHT) conditions 1 Magnesium bromide 1 Magnesium compounds 1 Monoglyceride 1 Nanoparticles 1 Palm oil 1 Rheological property 1 Rheology 1 Solid free 1 Viscosity 1