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在 35— 75℃和 2 4— 2 4 0bar( 2 .4— 2 4MPa)范围内 ,实验测定了甲烷在三元复合驱油液 (碱 表面活性剂 聚合物溶液 )中的溶解度。结果表明 ,甲烷在三元复合驱油液中的溶解特性与在盐溶液中相似 ,但在相同温度、压力下 ,三元复合驱油液比纯水和盐溶液对甲烷有更强的溶解能力。根据实验结果提出了胶束增溶机理。建立了甲烷在三元复合驱油液中的表观溶解常数 (Ka)与温度 (T)的关系式 :lnKa=754.99/T - 1 3.81 8。该方程结合其它参数方程 ,使理论计算甲烷在三元复合驱油液中的溶解度成为现实。
The solubility of methane in the ASP flooding solution (alkali surfactant polymer solution) was experimentally determined at 35-75 ° C and 2-4-4bar (2-4.4MPa). The results show that the solubility of methane in the ASP flooding fluid is similar to that in the salt solution. However, the ASP flooding solution has stronger ability to dissolve methane than pure water and salt solution under the same temperature and pressure . Based on the experimental results, the micellar solubilization mechanism is proposed. The relationship between apparent dissolution constant (Ka) and temperature (T) of methane in ASP flooding solution was established: lnKa = 754.99 / T - 1 3.81 8. This equation, combined with other parametric equations, makes it possible to theoretically calculate the solubility of methane in the ASP flooding fluid.