Study On The Synthesis Of AOS And Its Application In EOR

In this work, alpha-olefin (carbon number 14, 16, 18) were used as materials, the alpha-olefinsulfonates (AOS-h,AOS-14, AOS-16, AOS-18) were synthesized with applying gas SO₃ Film-Reactor,and its application properties in EOR were studied. The first tests were the alpha-olefin sulfonates'ssynthesition: by studying the factors of the reaction and analyzing the result, the optium synthesitionconditions obtained have been proved to be feasible. Then the synthesized alpha-olefin sulfonates wereused in EOR. Their properties of interfacial tension between ASP system and Daqing degassed oil weretested. The following results were obtained: when AOS were mix-used or only used, the alpha-olefinsulfonates which synthesized in lab neither with mix alpha olefin which made in our country nor withsimplex carbon number alpha-olefm imported were suit for EOR. There ASP system can't making theirinterfacial tension between ASP system and Daqing degassed oil to 10^-3mN/m; but when AOS-18 mixedwith post dodecylbenzene sulfonate, its formulation which was compatible with Daqing degassed oil wasobtained, their interfacial tension between ASP system and Daqing degassed oil is on the order of 10^-3)mN/m. And when AOS-18 mixed with post dodecylbenzene sulfonate, the system can be used both withNaOH and NaCO₃. The stability tests of the mixed system showed that its property was steady for EOR.The eoreflooding tset showed that oil recovery is increased by 20ï¼…under the condition of Daqing field.This work will be increase the source of EOR sufacetion, and be propitious to EOR technology estending inDaqing oil field.