Details

Autor(en) / Beteiligte

• Wang, X.
• Lun, Z.M.
• Wang, R.
• Lv, C.Y.
• Tang, Y.Q.
• Hu, W.
• Litvinenko, Vladimir

Titel

Multiphase flow interfacial tension experiment research during CO2 injected process

Ist Teil von

• Youth technical sessions proceedings, 2019, p.293-299

Auflage

1

Ort / Verlag

Routledge

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• For reservoirs entering the middle and late stage of development, there is still a large amount of residual oil remaining in the reservoir after water flooding, and CO2 flooding has been widely used as the main enhanced oil recovery technology at this time. To clear the interface characteristics and interaction relationship of oil-gas-water under high temperature and high pressure. The microscopic influencing factors of interfacial tension are analyzed and the mining effect of CO2 flooding in the late stage of high water cut reservoir is revealed. Axisymmetric drop shape analysis (ADSA) method has been used to measure the interfacial features of oil-gas, oil-carbonated water and oil-water system under the simulated-formation condition. The influence of density of medium, intermolecular force and interfacial tension of various physical parameters are analyzed from the microscopic point of view. The effects of two-phase density difference, intermolecular force and interfacial tension of various physical quantities of oil-water are analyzed. In the oil-CO2 system, the main factors affecting the interfacial tension are the density difference between two phases and the intermolecular force. In the oil-saturated carbonate system, the intermolecular force, the shape factor of suspended droplets and the square value of the maximum diameter of suspended droplets are the main factors to reduce the interfacial tension. This chapter analyzes the balance interfacial tension of crude oil-formation water system and crude oil-saturated CO2 formation water system were compared, and the main factors affecting interfacial tension of three systems. It discusses the effects of different media density, intermolecular forces and physical parameters on the interfacial tension of the system. Experiments using axisymmetric drop shape analysis technology, the technology are the most accurate method that measured the interfacial tension under high temperature and high pressure conditions. The fundamental cause of interfacial tension is the net attraction of molecules in the interfacial layer. At the same temperature, the main influencing factors are the polarity of the material and the pressure of the system. For oil-saturated carbonate system, the equilibrium interfacial tension decreases with the increase of pressure by 13.94%, much less than that of oil-CO2 system. The main factor affecting the interfacial tension of crude oil in oil-gas system is the difference of two-phase density.