西安石油大学：《油藏物理（油层物理学）Petro-physics》精品课程教学资源（英文课件）Flow 3.3 Interface phenomena on two phase surface 油藏岩石的渗流特征

Interface phenomena on two phase surface Xuanqi zhang Petroleum engineering college

Interface phenomena on two phase surface Xuanqi zhang Petroleum engineering college

油藏物理学一油藏岩石的渗流特征 free energy of the interface on two phase interface Definition:there are superfluous energy because molecule force field is imbalance on two phase interface.The energy is free energy of the interface on two phase interface

油藏物理学——油藏岩石的渗流特征 free energy of the interface on two phase interface Definition: there are superfluous energy because molecule force field is imbalance on two phase interface. The energy is free energy of the interface on two phase interface

The feature of free energy of the interface a.existent condition of free energy of the interface free energy of the interface can exist if fluids are immiscible

The feature of free energy of the interface a. existent condition of free energy of the interface free energy of the interface can exist if fluids are immiscible

油藏物理学一油藏岩石的渗流特征 b.existent region of free energy of the interface free energy of the interface not only exist single-molecule layer on the two-phase interface,but ul u2 also exist all interface layer hl h2 before molecular field attain balance

油藏物理学——油藏岩石的渗流特征 b. existent region of free energy of the interface free energy of the interface not only exist single-molecule layer on the two-phase interface, but also exist all interface layer before molecular field attain balance

油藏物理学一油藏岩石的渗流特征 c.amount of free energy of the interface based on second law of thermodynamics, it is possible that any free energy of the interface will attain minimum value. the more interfacial area,the more free energy of the interface. the more molecular polarity difference between two-phase interface,the more the

油藏物理学——油藏岩石的渗流特征 c. amount of free energy of the interface based on second law of thermodynamics, it is possible that any free energy of the interface will attain minimum value. ● the more interfacial area, the more free energy of the interface. ● the more molecular polarity difference between two-phase interface, the more the surface energy

O the more interfacial area,the more free energy of the interface. the more molecular polarity difference between two-phase interface,the more the surface energy

● the more interfacial area, the more free energy of the interface. ● the more molecular polarity difference between two-phase interface, the more the surface energy

example if there are three kinds of fluid,such as water,oil and gas,water molecular polarity is maximum,and gas molecular polarity is minimum.So the free energy of the interface of water- gas interface is maximum

example if there are three kinds of fluid, such as water, oil and gas, water molecular polarity is maximum, and gas molecular polarity is minimum. So the free energy of the interface of water￾gas interface is maximum

油藏物理学一油藏岩石的渗流特征 Interfacial tension definition:The interfacial tension has the dimensions of force per unit length and is free energy of the interface over interface area."o" 6=U/A unit:Newton/m

油藏物理学——油藏岩石的渗流特征 Interfacial tension definition: The interfacial tension has the dimensions of force per unit length and is free energy of the interface over interface area. “σ” σ＝Ｕ／Ａ unit：Newton/m

newtons/meter is the modern standard expression of the units.In the earlier literature,however,it is expressed as dynes/cm,which is numerically equal to millinewtons/m [(NX 10-3)/m or mN/ml. interfacial tension only exist on three-phase interface

newtons/meter is the modern standard expression of the units. In the earlier literature, however, it is expressed as dynes/cm, which is numerically equal to millinewtons/m [(N×10-3)/m or mN/ml. interfacial tension only exist on three-phase interface

油藏物理学一油藏岩石的渗流特征 a23 3 1 a13 012

油藏物理学——油藏岩石的渗流特征