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研究了二甘醇双(α-磺酸钠)烷基羧酸酯(DMES-n)、十二烷基二甲基胺乙内酯(BS-12)两类表面活性剂与原油的界面张力,并考察了表面活性剂的耐温抗盐性。实验结果表明,DMES-n能将油水界面张力降低至10-2mN/m数量级,但是抗盐性不如BS-12;将两者复配后,在NaCl浓度为30 000～100 000 mg/L、MgCl2和CaCl2浓度为10 000 mg/L的条件下,DMES-14/BS-12和DMES-16/BS-12复配体系都能将油水界面张力降低至10-3mN/m数量级,表明复配体系既具有更好的降低界面张力的能力,同时还具有良好的抗高盐、高钙镁性能以及良好的耐温性。
The interfacial tension between two surfactants (DMES-n) and dodecyldimethyl-amine-lactone (BS-12) , And investigated the temperature and salt resistance of the surfactant. The experimental results show that DMES-n can reduce the oil-water interfacial tension to the order of 10-2mN / m, but the salt resistance is not as good as that of BS-12. When the concentrations of NaCl and NaCl are 30 000 ~ 100 000 mg / L, Under the conditions of MgCl2 and CaCl2 concentrations of 10 000 mg / L, the interfacial tension between oil and water can be reduced to the order of 10-3 mN / m by DMES-14 / BS-12 and DMES-16 / BS- The system not only has a better ability to reduce the interfacial tension, but also has good resistance to high salt, high calcium and magnesium properties and good temperature resistance.