—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
—Heavy oil emulsion, steam and CO2
injection, interfacial tension, oil swelling factor.
K. Maneeintr is with the Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand (e-mail: Krengkrai.M@ Chula.ac.th). T. Babadagli is with the School of Mining and Petroleum Engineering, Department of Civil and Environmental Engineering, University of Alberta, Edmonton, T6G 2W2 Canada. K. Sasaki, and Y. Sugai are with the Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819 0395, Japan.
Cite:Kreangkrai Maneeintr, Tayfun Babadagli, Kyuro Sasaki, and Yuichi Sugai, "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," International Journal of Environmental Science and Development vol. 5, no. 2, pp. 118-123, 2014.