In this paper, the three sulfonates and their formulations which are compatible with Degassed Daqing oil with low acid number were obtained by Sulfonate PSD-2 sulfonated from the Daqing fractional oil, Stepan B-100 from Stepan Chemical Co. and TRS - 18/TRS - 40 from Witco Chemical Co. The interfacial tension (IFT) between ASP System with low sulfonate concentration and degassed Daqing oil is on the order of 10(-3)mN/m. The rheologic test show that the change in viscosity is very small as an alkaline is added, but higher somewhat when a surfactant is added. The coreflooding test show that the oil recovery is increased by 30% (OOIP) and water cut is reduced from 98% to 50% under the condition of Daqing field. When 0.2 PV of ASP system with 1.0% wt petroleum sulfonate is injected, oil recovery can be increased by 20% (OOIP). The analysis of effluent produced in core show that the retentions of both surfactant and alkaline in core are low very much, both less than 1 mg/g core in the presence of alkaline. The investigation results of this study not only display a good prospects for the EOR but also provide the formulations for a pilot test in Daqing oilfield.