Synthesis of fluorinated nano-silica and its application in wettability alteration near-wellbore region in gas condensate reservoirs

► Wettability alteration to gas wetness is proposed to Sarkhun rock in this study. ► We have prepared fluorinated silica nanoparticles to alter rock wettability. ► The effect of this method is evaluated by various tests. ► Water contact angle of 147° and n-decane contact angle of 61° were measured on the core surface after treatment.