Miscibility determination from gas-oil interfacial tension and P-R equation of state

被引：11

作者：

Ayirala, Subhash C. ^{[1
]}

Rao, Dandina N. ^{[1
]}

机构：

[1] Louisiana State Univ, Craft & Hawkins Dept Petr Engn, Baton Rouge, LA 70803 USA

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 2007年 / 85卷 / 03期

关键词：

equation of state; gases; interface; interfacial tension; miscibility; petroleum; saturation pressure; vanishing interfacial tension technique;

D O I：

10.1002/cjce.5450850305

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Recently a new experimental technique of vanishing interfacial tension (VIT) has been developed to enable rapid and cost-effective determination of miscibility in gas-oil systems. In this study, VIT experiments have been extended to two standard gas-oil systems of n-decane-CO(2) and live decane-CO(2) at elevated pressures and temperatures. The VIT miscibilities of the two standard gas-oil systems and the two reservoir crude oil-gas systems, namely Rainbow Keg River (RKR) and Terra Nova, were compared with Peng-Robinson (P-R) equation of state (EOS) calculations. The close match of VIT miscibilities with other conventional experimental techniques in the standard gas-oil systems, as well as the reasonable match obtained with untuned PR-EOS calculations for several systems studied, clearly demonstrates the sound conceptual basis of VIT technique to determine fluid-fluid miscibility in multi-component hydrocarbon systems.

引用

页码：302 / 312

页数：11

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