三次采油驱油用表面活性剂的制备及性能研究
朱梅松 , 范亚科 , 莫文龙 , 王林杰 , 杨杨 , 王晓光
现代化工 ›› 2025, Vol. 45 ›› Issue (S2) : 318 -323.
三次采油驱油用表面活性剂的制备及性能研究
Study on preparation and properties of surfactant for tertiary oil recovery
为有效提高低渗高温高矿化度油藏的开采效率,通过羧甲基化法以脂肪醇聚氧乙烯醚和氯乙酸为主要原料制备了一种驱油用表面活性剂AEO-C,并对其进行了系统的性能评价。实验结果表明,AEO-C具有优异的界面活性和强劲的润湿反转能力,当浓度为0.005 mol/L时油水界面张力能达到10-3 mN/m超低界面张力水平;浓度为0.01 mol/L时,模拟矿化水与改性石英片的接触角最低至24.37°;其渗吸采油率达到16.72%,但起泡高度仅为20 mm,5 min内稳泡高度为0。在80℃、1.6×105 mg/L NaCl、9×103 mg/L CaCl2的高温高矿化度条件下静置7 d后均能达到超低界面张力水平;与模拟油几乎不发生乳化,60 min内乳化效率为0。
In order to effectively improve the exploitation efficiency of oil reservoirs with low permeability,high temperature and high salinity,AEO-C,a surfactant for oil displacement,is prepared through carboxymethylation with fatty alcohol polyoxyethylene ether and chloroacetic acid as main raw materials,and its performance is systematically evaluated.Experimental results show that AEO-C has excellent interfacial activity and strong wettability reversal ability.The oil-water interfacial tension can reach 10-3 mN/m,an ultra-low interfacial tension level,when the concentration of AEO-C is 0.005 mol/L.The contact angle between the simulated mineralized water and the modified quartz sheet is as low as 24.37° when the concentration of AEO-C is 0.01 mol/L.The imbibition oil recovery rate reaches 16.72%,but the foaming height is 20 mm only,and the stable foam height is 0 within 5 min.Under the conditions of 80℃,1.6×105 mg/L NaCl and 9×103 mg/L CaCl2,the ultra-low interfacial tension can be achieved after standing for 7 days.AEO-C hardly emulsifies with the simulated oil,and the emulsification efficiency is 0 within 60 min.
surfactant / wetting reversal / interfacial tension / high temperature and high salinity
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