1.Darcy's law and absolute permeability French engineer Henry Darcy developed a fluid flow equation that since has become one of the standard mathematical tools of the petroleum engineer This equation is expressed in differential form as follows:
French engineer Henry Darcy developed a fluid flow equation that since has become one of the standard mathematical tools of the petroleum engineer . This equation is expressed in differential form as follows: 1. Darcy’s law and absolute permeability
△P 油藏物理学一傭层岩石的碜透率 9= K dp u= A u dl or Q=K4.2x10 Darcy's equation u L u fluid velocity,cm/s.q=flow rate cm3/s. k permeability of the porous rock,Darcy (0.986923m2)
油藏物理学——储层岩石的渗透率 10 L A p Q K P Darcy’s equation dl K dP A q u C or u = fluid velocity, cm/s. q = flow rate cm3/s. k = permeability of the porous rock, Darcy (0.986923 μm2 )
Ac=cross-sectional area of the rock,cm2. u=viscosity of the fluid,centipoises(cP ) mPa's. 1 length of the rock sample,cm. dp dl pressure gradient in the direction of the flow,atm/cm
Ac= cross-sectional area of the rock, cm2 . μ= viscosity of the fluid, centipoises (cP )/ mPa∙s. 1 = length of the rock sample, cm. = pressure gradient in the direction of the flow, atm/cm. dl dp
油藏物理学一傭层岩石的渗透率 Units on Darcy's law SI SE Di Q m3/s cm3/s cm3/s A m2 cm2 cm2 L m cm cm Pas cp mPa s △P Pa atm MPa K m2 Darcy ×0.1μm2
油藏物理学——储层岩石的渗透率 SI SE DI Q m3 /s cm3 /s cm3 /s A m2 cm2 cm2 L m cm cm μ Pa·s cp mPa·s ΔP Pa atm MPa K m2 Darcy ×０.１μm2 Units on Darcy’ s law
One Darcy is relatively high permeability. The permeability of most petroleum reservoir rocks is less than one Darcy.Thus a smaller unit of permeability,the millidarcy (mD),is widely used in the oil and gas industry.In SI units,the square micrometer (um2)is used instead of m2
One Darcy is relatively high permeability. The permeability of most petroleum reservoir rocks is less than one Darcy. Thus a smaller unit of permeability, the millidarcy (mD), is widely used in the oil and gas industry. In SI units, the square micrometer (μm2 ) is used instead of m2