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选择与转相相关并形成中相的相态试验方法,研究提高异常相态原油的增溶作用以及进一步降低界面张力的途径.实验表明,当使用大庆脱气原油配制微乳液时,得出了石油磺酸盐的平均当量与最佳含盐量对数关系的标准曲线,从曲线上看出,适合大庆原油的磺酸盐平均当量为520左右,根据这一参数界限,得到了使原油的界面张力达到10~(-3)mN/m 的较好的驱油配方,同时增加石油磺酸盐的平均当量和增加醇的碳链长度以及使用混合醇,改善了对原油的增溶作用,降低了界面张力,并加宽了驱油体系对含盐量的适应范围.
The phase-state test method which is related to the phase transition and forms the middle phase is selected to study the ways to increase the solubilization of the crude oil in the abnormal phase and to reduce the interfacial tension.Experiments show that when Daqing degassed crude oil is used to prepare the microemulsion, The average equivalent of petroleum sulfonate and the best logarithm of salt content of the standard curve, seen from the curve, suitable for Daqing crude oil sulfonate average equivalent of 520 or so, according to this parameter limit, got the crude oil The interfacial tension of 10 ~ (-3) mN / m better oil displacement formula, while increasing the average equivalent weight of petroleum sulfonates and increasing the carbon chain length of the alcohol and the use of mixed alcohols to improve the solubilization of crude oil, Reduce the interfacial tension, and broaden the oil displacement system to adapt to the range of salt content.