effect of nano silica as nano-inhibitor in the presence of cdea surfactant on the prevention of asphaltene precipitation

Precipitation of asphaltene is a mechanism that makes many problems for the production and processing of oil# also, deposition and adsorption of it on reservoir rock, change its properties like wettability and permeability# in this study, the effect of sio2 nanoparticles on delay the onset point of asphaltene precipitation was investigated beside the cdea surfactant# results of onset analysis showed this sio2 nanoparticles increase the onset point due to their high contact surface area and high dispersing properties# also, cdea surfactant as the dispersant, helps the sio2 nanoparticles to increase further the onset point of the crude oil and to reduce the amount of asphaltene precipitation# the cdea delayed onset point of oil from 9% to 13% and sio2 nanoparticles increased this amount to 17%#