MEDIDAS DE TENSÃO INTERFACIAL EM ALTAS PRESSÕES PARA O SISTEMA CO2 – PETRÓLEO BRASILEIRO

MEDIDAS DE TENSÃO INTERFACIAL EM ALTAS PRESSÕES PARA O SISTEMA CO2 – PETRÓLEO BRASILEIRO

BORGES, G. R.; FORTUNY, M.; SANTOS, A. F.; DARIVA, C.; FRANCESCHI, E.; ROCHA, S. R. P. da

Artigo:

Enhanced oil recovery (EOR) processes are important to the petroleum industry. In the EOR, gases such carbon dioxide (CO2) and natural gas are injected in the petroleum reservoirs for oil recovering. It is well known that the interfacial tension between the injected gas and the oil has influence on the efficiency of displacement of oil by gas. When the injected gas becomes miscible with the oil, it is displaced with efficiency, resulting in high recoveries. In this study, an experimental setup is established to measure the dynamic and equilibrium interfacial tensions (IFT) of the Brazilian crude oil + CO2 system under various conditions using the pendant drop technique. This experimental technique is used to determine the interfacial tension of the above system at different pressures and temperatures. The measured IFT data will provide a better understanding of the interfacial interactions between the crude oil and CO2 and, consequently, to improve the economics of the gas injection process.

Enhanced oil recovery (EOR) processes are important to the petroleum industry. In the EOR, gases such carbon dioxide (CO2) and natural gas are injected in the petroleum reservoirs for oil recovering. It is well known that the interfacial tension between the injected gas and the oil has influence on the efficiency of displacement of oil by gas. When the injected gas becomes miscible with the oil, it is displaced with efficiency, resulting in high recoveries. In this study, an experimental setup is established to measure the dynamic and equilibrium interfacial tensions (IFT) of the Brazilian crude oil + CO2 system under various conditions using the pendant drop technique. This experimental technique is used to determine the interfacial tension of the above system at different pressures and temperatures. The measured IFT data will provide a better understanding of the interfacial interactions between the crude oil and CO2 and, consequently, to improve the economics of the gas injection process.

Palavras-chave:

DOI: 10.5151/chemeng-cobeq2014-1222-20417-158078

Referências bibliográficas

• [1] AHMED, T.; MEEHAN, D. N. Advanced Reservoir Management and Engineering, 2ª. ed. Waltham: Gulf Professional Publishing, 2012.
• [2] CAO, M.; GU, Y. Temperature effects on the phase behavior, mutual interaction sand oil recovery of a light crude oil–CO2 system, Fluid Phase Equilibr., v. 356, p. 78–89, 2013.
• [3] ELSHARKAWY, A. M. Measuring CO2 Minimum Miscibility Pressures: Slim-Tube or Rising-Bubble Method?, Energ. Fuel., v. 10, p. 443 – 449, 1996.
• [4] Área temática: Engenharia das Separações e Termodinâmica 7FONSECA, J. M. S.; DOHRN, R, PEPER, S. High-pressure fluid-phase equilibria: Experimental methods and systems investigated (2005–2008), Fluid Phase Equilibr., v. 300, p. 1 – 69, 2011.
• [5] JAEGER, P. T.; EGGERS, R. Interfacial properties at elevated pressures in reservoir systems containing compressed or supercritical carbon dioxide, J. Supercrit. Fluid., v. 66, p. 80 – 85, 2012.
• [6] LUO, P.; YANG, C.; GU, Y. Enhanced solvent dissolution into in-situ upgraded heavy oil under different pressures, Fluid Phase Equilibr., v. 252, p. 143 – 151, 2007.
• [7] MANAFI, H.; MANSOORI, G. A.; GHOTBI, S. Phase behavior prediction of petroleum fluids with minimum characterization data, J. Petrol. Sci. Eng., v. 22, p. 67 – 93, 1999.
• [8] MELO, C. L.; THEDY, E. A.; ROCHA, P. S.; ALMEIDA, A. S.; MUSSE, A. P. The challenges on the CCGS monitoring in the development of Santos Basin Pre-salt Cluster, Energy Procedia, v. 4, p. 3394 – 3398, 2011.
• [9] MME. Balanço Energético Nacional 2012 - Ano base 2011: Síntese do Relatório Final, Ministério de Minas e Energia. Rio de Janeiro, p. 18-19. 2012.
• [10] NOBAKHT, M.; MOGHADAM, S.; GU, Y. Determination of CO2 minimum miscibility pressure from measured and predicted equilibrium interfacial tensions, Ind. Eng. Chem. Res., v. 47, p. 8918 – 8925, 2008.
• [11] ORR JR., F. M.; JESSEN, K. Phase Diagrams. In: FANCHI, J. R. (ed) Petroleum Engineering Handbook, capítulo 8, Richardson, Society of Petroleum Engineers, 2006.
• [12] RAO, D. N. A new technique of vanishing interfacial tension for miscibility determination, Fluid Phase Equilibr., v. 139, p. 311-324, 1997.
• [13] RAO, D. N.; LEE, J. I. Determination of gas–oil miscibility conditions by interfacial tension measurements, J. Colloid Interf. Sci., v. 262, p. 474 – 482, 2003.
• [14] ROBIN, M. Method and device for measuring the minimum miscibility pressure of two phases, United States Patent, 7779672, 2010.
• [15] SELVAM, P.; PEGUIN, R. P. S.; CHOKSHI, U.; DA ROCHA, S. R. P. Surfactant Design for the 1,1,1,2-Tetrafluoroethane-Water Interface: ab initio Calculations and in situ High-Pressure Tensiometry, Langmuir, v. 22, p. 8675-8683, 2006.
• [16] WANG, X.; ZHANG, S.; GU, Y. Four Important Onset Pressures for Mutual Interactions between Each of Three Crude Oils and CO2, J. Chem. Eng. Data, v. 55, p. 4390 – 4398, 2010.

Como citar:

BORGES, G. R.; FORTUNY, M.; SANTOS, A. F.; DARIVA, C.; FRANCESCHI, E.; ROCHA, S. R. P. da; "MEDIDAS DE TENSÃO INTERFACIAL EM ALTAS PRESSÕES PARA O SISTEMA CO2 – PETRÓLEO BRASILEIRO", p-15524-15531. In: Anais do XX Congresso Brasileiro de Engenharia Química - COBEQ 2014 [= Blucher Chemical Engineering Proceedings, v.1, n.2]. São Paulo: Blucher, 2015.
ISSN 23591757, DOI 10.5151/chemeng-cobeq2014-1222-20417-158078