陈庄原油超低界面张力驱油体系研究

Research on ultralow interfacial tension flooding system of Chenzhuang crude oil

关键词:  毛管数  表面活性剂  碱  复配  超低界面张力

Key words:  capillary number  surfactant  alkali  combination system  ultralow interfacial tension

摘要:

开展了单一表面活性剂体系、表面活性剂复配体系及碱+表面活性剂体系与陈庄原油间动态界面张力的测定实验。实验结果表明:CBET-13在较宽的质量分数范围内(0.05%～0.15%)可以使油水界面张力达到超低;质量比为4∶1的SLPS与KAS复配体系,当总质量分数在0.075%～0.15%的范围内可以使油水界面张力平衡值降至10-4 mN/m数量级;总有效质量分数为0.1%、质量比在(9∶1)～(6∶4)范围内的CBET-13与CBET-17复配体系使油水界面张力降到超低;0.2%NaOH+((0.05%～0.2%)SLPS、(0.025%～0.05%)AS-0-4、(0.01%～0.075%)AS-3-0、(0.03%～0.09%)HSBET-12)体系可以使油水界面张力降至10-3 mN/m以下。以上体系,可以作为陈庄油田超低界面张力驱油配方的选择。

Abstract:

Dynamics interfacial tension determination experiment is carried out in single surfactant,surfactant combination systems and alkali + surfactant systems with Chenzhuang crude oil.The results show that CBET-13 with mass fraction of 0.05%-0.15% can make oil-water interfacial tension decreases to ultra low;While the mass ratio of SLPS and KAS is 4∶1,the total mass fraction is in the range of 0.075%-0.15%,the equilibrium interfacial tension value can decrease to magnititude 10-4 mN/m;with the total effective mass fraction of 0.1% and the mass ratio of CBET-13:CBET-17=9:1-6:4,the interfacial tension can decrease to ultra low;with the systems of alkali + surfactant(0.2%NaOH+(0.05-0.2%SLPS,0.025%-0.05%AS-0-4,0.01%-0.075%AS-3-0,0.03%-0.09%HSBET-12),oil-water interfacial tension can decrease to less than 10-3 mN/m.These flooding systems can be used as flooding formulas in Chenzhuang oilfield.