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针对三元复合溶液通过井下工具、炮眼后受到不同程度剪切从而影响三元复合驱整体驱油效果问题,开展剪切作用对三元复合驱界面张力的影响分析,通过室内实验,对比分析剪切程度在0%、20%、35%、50%时,不同类型三元复合驱溶液放置120min内的界面张力变化情况,对比结果表明:相同配制浓度下,强碱三元复合溶液界面张力大于弱碱,随着剪切程度的变化和溶液静止时间的推移,强碱三元复合溶液界面张力变化幅度大于弱碱三元复合溶液,但都能保证在0.01m N/m以下的超低界面张力范围内,未改变三元复合驱超低界面张力提高采收率方式。实验结果为进一步研究剪切对于三元复合溶液的影响提供理论依据。
Aiming at the problem that the ternary composite solution passes through the downhole tool and is sheared by different degrees after the blasting, the effect of the ASP flooding on the overall flooding effect is affected, and the influence of shearing action on the interfacial tension of the ASP flooding is analyzed. Through laboratory experiments, The interfacial tension changes of different types of ternary composite flooding solution within 120min when the degree of cut is 0%, 20%, 35%, 50%, the comparison results show that the interfacial tension of the ternary complex solution with strong base is greater than Weak base, with the change of shear degree and the quiescent time of the solution, the change of interfacial tension of the ternary complex solution is larger than that of the weak ternary ternary complex solution, but all can ensure ultra-low interface below 0.01m N / m Within the tension range, the ultra-low interfacial tension of the ternary composite flooding system is not changed to improve oil recovery. The experimental results provide the theoretical basis for further study of the influence of shear on the ternary complex solution.