Industry/University Cooperative Research: Experimental Study of Liquid-Liquid-Vapor Phase Equilibria Behavior in Rich Gas Plus Hydrocarbon Mixtures

这是对选定的原型富气+烃三元混合物多相平衡的实验研究，有助于理解富气驱油体系的相平衡行为。具体地说，(1)甲烷+乙烷+正二十二烷，(2)甲烷+乙烷+正十四烷，(3)乙烷+丙烷+正十四烷三元混合物的液-液-汽相平衡的研究正在进行中，以评估添加气体如何扩大热力学相空间中三相行为的发生。测量了三种液体相的组成和摩尔体积，并确定了液-液-汽区边界的位置和性质。这些研究是在现有视觉细胞仪器的压力高达1500 PSIA的情况下，在0至100摄氏度的温度范围内进行的。收集的数据对于模拟和评价潜在的富气强化采油过程以及对多相平衡本身的科学理解都是基本感兴趣的。

This is an experimental study of the multiphase equilibria of selected prototype rich-gas-plus-hydrocarbon ternary mixtures, which can contribute to the understanding of the phase equilibria behavior of rich gas-enhanced oil recovery systems. Specifically, the study of the liquid-liquid-vapor phase equilibria of the ternary mixtures (1) methane plus ethane plus n-docosane, (2) methane plus ethane plus n- tetradecylbenzene, and (3) ethane plus propane plus n- tetradecylbenzene is under way to evaluate how additive gases expand the occurrence of three-phase behavior in thermodynamic phase space. Compositions and molar volumes of the three fluid phases are measured, and the location and nature of the boundaries of the liquid-liquid- vapor regions are identified. The studies are performed in the temperature range of 0 to 100 degrees Celsius at pressures up to 1500 psia in an existing visual cell apparatus. The data gathered are of fundamental interest to the simulation and evaluation of potential rich gas-enhanced oil recovery processes, as well as of interest to the scientific understanding of multiphase equilibria per se.