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 3.4 Relative permeability curve 相对渗透率

Relative permeability curve Xuanqi zhang Petroleum engineering college

Relative permeability curve Xuanqi zhang Petroleum engineering college

油藏物理学—一相对渗透率 Several concept 1.Absolute permeability means if the rock is 100% saturated with a single fluid (or phase),such as oil, gas,or water,and the fluid flow through porous media and totally cannot reacted with rock,the ability of the fluid flowing through porous media is called absolute permeability. It only depends on rock property,has nothing to do with fluid property

油藏物理学——相对渗透率 Several concept 1. Absolute permeability means if the rock is 100% saturated with a single fluid (or phase), such as oil, gas, or water, and the fluid flow through porous media and totally cannot reacted with rock, the ability of the fluid flowing through porous media is called absolute permeability. It only depends on rock property, has nothing to do with fluid property

油藏物理学—相对渗透率 2.Effective permeability or phase permeability In presence of more than one fluid,permeability is called the "effective"permeability (Ko,Kw,or Kg being oil,water,or gas effective permeability respectively)

2. Effective permeability or phase permeability In presence of more than one fluid, permeability is called the “effective”permeability (Ko, Kw, or Kg being oil, water, or gas effective permeability respectively). 油藏物理学——相对渗透率

Reservoir fluids interface with each other during their movement through the porous channels of the rock;consequently,the sum of the effective permeabilities of all the phases will always be less than the absolute permeability. That is Ko+Kw+Kg<1

Reservoir fluids interface with each other during their movement through the porous channels of the rock; consequently, the sum of the effective permeabilities of all the phases will always be less than the absolute permeability. That is Ko+Kw+Kg＜1

3.Relative permeability In presence of more than one fluid in the rock,the ratio of effective permeability of any phase to the absolute permeability of the rock is known as the "relative"permeability (kr)of that phase. For example,the relative permeability of the oil, gas,and water would be Kro=Ko/K,Krg =Kg/K Kw =Kw/K respectively

3. Relative permeability In presence of more than one fluid in the rock, the ratio of effective permeability of any phase to the absolute permeability of the rock is known as the "relative" permeability (kr) of that phase. For example, the relative permeability of the oil, gas, and water would be Kro = Ko/K, Krg = Kg/K, Kw =Kw/K respectively

油藏物理学一相对渗透率 That is K K K if there are oil and water in the reservoir because of Ko+Kw<1, Kro+Knv<I

That is 油藏物理学——相对渗透率 K K K i ri  Kro  Krw 1 if there are oil and water in the reservoir , because of Ko+Kw＜1

油藏物理学—相对渗透率 4.Mobility and mobility ratio s K。 山。 are respectively water mobility and oil mobility,and show the degree fluid flowing through porous media. The moreo,the more the degree

4. Mobility and mobility ratio 油藏物理学——相对渗透率 o o o w w w K K      ,  λw、λo are respectively water mobility and oil mobility, and show the degree fluid flowing through porous media. The more λw、λo , the more the degree

油藏物理学一相对渗透率 5.Mobility ratio M M= themobilityofdisplacingfluid themobilityofdisplacedfluid If water displace oil in the porous media, λw M KeLw 2oK。/4

themobilityofdisplacedfluid themobilityofdisplacingfluid M  油藏物理学——相对渗透率 5. Mobility ratio M o o w w K K o w M     / /   If water displace oil in the porous media

油藏物理学—相对渗透率 6.water-cut h= KWA△P/4wL KwILw QKWA△PKoA△P Kv+Ko Lw uo 1 1 九w+ )1+ 1 1+ Kw Ho M 1 fr= 1+ Kw Mo Ko F(Sw) Kw

6. water-cut 油藏物理学——相对渗透率 K M K K K K L K A P L K A P K A P L Q Q f O W W W O O W O O W W W W O O W W w W W w 1 1 1 1 1 / /                           ( ) ( ) 1 1 W W O W O O W W O w F S K K K K F K K f       

油藏物理学—相对渗透率 the relationship between relative permeability and saturation 1.What is relative permeability curve? relative permeability curve is the relationship between relative permeability of oil and water and water saturation

the relationship between relative permeability and saturation 1. What is relative permeability curve? relative permeability curve is the relationship between relative permeability of oil and water and water saturation. 油藏物理学——相对渗透率