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考察了自制的双直链烷基硫酸盐型孪连表面活性剂的界面性能和驱油性能。结果表明,双直链烷基硫酸盐型孪连表面活性剂的CMC在10-5～10-6 mol/L;随着表面活性剂浓度的增加,界面张力达到平衡时所需要的时间明显延长;随着连接基团碳链长度的增加,油水界面张力先增大再减小;该类孪连表面活性剂具有非常好的抗一价盐二价盐的能力;用2C13-C2-2SO4Na作为驱油剂进行驱油实验时,可以使采收率在水驱基础上提高5%以上,具有比较好的驱油效果。
The interfacial properties and flooding performance of self-made double-chain alkyl sulfate-type gemini surfactants were investigated. The results showed that the CMC of double-chain alkyl sulfate-type gemini surfactant was in the range of 10-5 ~ 10-6 mol / L. With the increase of the surfactant concentration, the time required for the interfacial tension to reach equilibrium was significantly prolonged ; As the carbon chain length of the linker increased, the interfacial tension between oil and water first increased and then decreased; this type of gemini surfactant had a very good ability to resist monovalent salt divalent salts; and with 2C13-C2-2SO4Na as Oil displacement agent for oil displacement experiments, you can make the recovery rate increased by more than 5% based on the water flooding, with a better displacement effect.