标题：Analysis of Heavy Oil Emulsion-Carbon Dioxide System on Oil-Swelling Factor and Interfacial Tension by Using Pendant Drop Method for Enhanced Oil Recovery and Carbon Dioxide Storage
期刊名称：International Journal of Environmental Science and Development
印刷版ISSN：2010-0264
出版年度：2014
卷号：5
期号：2
页码：118-123
DOI：10.7763/IJESD.2014.V5.462
摘要：Heavy oil becomes more interest owing to oil prices and the huge amount of reserves.Steam injection is a common method for heavy-oil production with emulsion formation.Also carbon dioxide injection is applied for viscosity and interfacial tension reduction.CO2 becomes more important because of environmental concerns.CO2 storage in reservoirs like depleted oil wells becomes widespread.Hence, understanding the behavior of CO2 when it encounters emulsive heavy-oil is critical.In this work, the interfacial tension and oil-swelling factors of CO2 in oil and its emulsions are measured at 296 K and pressure from 0.5 to 1.5 MPa with water/oil ratio from 0.00 to 12.27 percent compared to original oil.The results show that the interfacial tension decreases at higher pressure ranging from 3.7 to 16.8 percent and water content from 10.3 to 22.6 percent.Furthermore, oil-swelling factors increase with pressure and water content up to 1.9 percent and 8.0 percent, respectively.These results are explained by absorption processes in that high pressure can serve as high driving force for CO2 solubility.
关键词：Heavy oil emulsion; steam and CO 2 injection; interfacial tension; oil swelling factor
