It is an important concern to prevent asphaltene related damages in hydrocarbon reservoirs.There are many investigations about asphaltene and its effects and how to reduce them during the oil production. In the present work, some experiments have been conducted to investigate the effect of the SiO2, NiO, and Fe3O4 nanoparticles on the oil recovery, and find out how they adsorb asphaltene and prevent its precipitation. Moreover, instead of crude oil, a synthetic solution with a given component concentration is used. Results of this study show that in solutions without nanoparticles, increase in the amount of normal heptane causes more asphaltene aggregation takes place; however, in the presence of nanoparticles, increasing the normal heptane would result in an increase in the asphaltene adsorption on the surface of nanoparticles. Furthermore, It is shown that the amount of oil recovery in the presence of different nanoparticles corresponds to the ordering: SiO2> NiO> Fe3O4.

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