CHARACTERIZATION AND APPLICATION OF PETROLEUM SULFONATE SYNTHESIZED BY
GAS-PHASE SO3 SULFONATION IN ROTATING PACKED BED
In this study, PS was synthesized by gaseous SO3 sulfonation of
distillate oil in a rotating packed bed. The chemical compositions of
the prepared PS and its raw material (distillate oil) were obtained by
the combined analysis of the double-bond equivalent and carbon number at
the molecular level. In addition, the EOR performance of PS has been
studied by measuring surface tension, interfacial tension (IFT),
wettability alteration and core-flooding experiments. An ultra-low IFT
value 1.327×10-3 mN/m between the crude oil and prepared PS solution was
obtained at the critical micelle concentration (CMC) of PS solution.
Core flooding experiments showed that additional oil recoveries of
28.10% and 30.77% were obtained at PS concentrations of 0.3% and
0.6% respectively after conventional water flooding, indicating the
prepared PS has good performance on EOR.