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

本文是对几种不同类型的多相平衡进行的实验研究。 原型富气加碳氢化合物三元混合物， 有助于了解相平衡行为的 富气强化采油系统 具体而言，研究 三元混合物（1）的液-液-汽相平衡 甲烷+乙烷+正二十二烷，（2）甲烷+乙烷+正二十二烷， 十四烷基苯，和（3）乙烷+丙烷+正- 十四烷基苯正在评估添加剂气体如何膨胀 在热力学相空间中出现三相行为。 测量了三种流体相的组成和摩尔体积， 以及液-液-液边界的位置和性质， 识别蒸汽区域。 研究在0到100度的温度范围内进行 在现有视觉细胞中，压力高达1500 psia时的摄氏度 设备. 所收集的数据对以下方面具有根本意义： 富气提高采收率潜力模拟与评价 的科学认识，以及科学认识的重要性。 多相平衡

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.