| In this study, oleum and sulfur trioxide were used as the sulfurizing agent, heavy alkyl benzene and distillate oil were sulfurized under the different conditions. The effect of rate of reactants. reaction temperature, reaction time and different distillate oil on the properties of petroleum sulfonate were studied. The ration of reactants (acid:alkyl) is a important factor.The results of IFT tests show that the IFT value between the oil and ASP system can reach the order of 10-3mN/m, So the surfactant can meet the standard of ASP flooding.The ASP formula was confirmed with the core flooding test. The results show the enhanced oil recovery is 20%(OOIP) over that of the water flooding. To heterogeneous core, the contribution of polymer to the displacement efficiency is higher than that of surfactant. The size of the ASP slug and the concentration of chemicals were also optimized. |
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