Comparative Static and Dynamic Analyses of Solvents for Removal of Asphaltene and Wax Deposits above- and below-Surface at an Iranian Carbonate Oil Field

During production from oil wells, the deposition of asphaltene and wax at surface facilities porous media is one major operational challenges. The crude rate significantly reduced due to inside reservoir. In addition, these solids costly companies. this study, efficiency different solvents in dissolving was investigated through static dynamic tests. analysis solid deposits choke Iranian carbonate fields showed that they consisted 41.3 wt % asphaltene, balance predominantly wax. asphaltenes obtained had a more complex structure than extracted itself. tests xylene, toluene, gasoline, kerosene, gas condensate highest efficiencies deposits; conversely, diesel negative impact on deposits. Static pure that, among tested solvents, effect solubility asphaltene. core flooding results cores permeability by 79–91%. Among kerosene resulted efficacy restoring damaged permeability, higher with an equivalent solvent injection 1 bbl/min versus 3 bbl/min.