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API RP 14E Fluid Density

Calculate API RP 14E fluid density for single phase and multi phase fluids.

The fluid density can be calculated for single phase gas, two phase gas and liquid, two phase oil and water, or three phase gas oil and water.

Reference : API 14E Recommended Practice For Design and Installation of Offshore Production Platform Piping Systems

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CALCULATOR : API RP 14E Section 2.5 Fluid Density (Two Phase Gas Liquid) [FREE]   ±

Calculate gas, liquid and two phase fluid density (API RP 14E section 2.5).

Gas oil ratio (GOR) is the ratio of gas moles to oil volume at standard conditions. Gas moles are commonly measured as standard cubic feet (SCF), or standard cubic meters (SCM).

Tool Input

  • mvtype : Fluid Density Type
    • GORu : User Defined Gas Oil Ratio
    • Xmu : User Defined Gas Mass Fraction
    • Xvu : User Defined Gas Volume Fraction
    • ρu : User Defined Fluid Density
  • ρl : Liquid Density
  • P : Fluid Pressure
  • T : Fluid Temperature
  • Z : Gas Compressibility Factor
  • SG : Gas Specific Gravity

Tool Output

  • ρf : Average Fluid Density
  • ρg : Gas Density (At T P)
  • GOR : Gas Oil Ratio
  • Xm : Gas Mass Fraction
  • Xv : Gas Volume Fraction (At T P)
  • vg : Gas Mole Volume (At T P)
CALCULATOR : API RP 14E Section 2.5 Fluid Density (Three Phase Gas Oil And Water) [FREE]   ±

Calculate gas, oil, water and three phase black oil density.

Black oil is a three phase mixture of oil, water and gas. Water cut is measured relative to the total liquid volume (gas volume is ignored). Gas oil ratio (GOR) is the ratio of gas moles to oil volume at standard conditions (water volume is ignored). Gas moles are commonly measured as standard cubic feet (SCF), or standard cubic meters (SCM).

Tool Input

  • mvtype : Fluid Density Type
    • GORu : User Defined Gas Oil Ratio
    • WCu : User Defined Water Cut
    • ρu : User Defined Fluid Density
  • ρo : Oil Density
  • ρw : Water Density
  • P : Fluid Pressure
  • T : Fluid Temperature
  • Z : Gas Compressibility Factor
  • SG : Gas Specific Gravity

Tool Output

  • ρf : Average Fluid Density
  • ρg : Gas Density
  • ρl : Liquid Density
  • GOR : Gas Oil Ratio
  • WC : Water Cut
  • Xmg : Gas Mass Fraction
  • Xml : Liquid Mass Fraction
  • Xmo : Oil Mass Fraction
  • Xmw : Water Mass Fraction
  • Xvg : Gas Volume Fraction
  • Xvl : Liquid Volume Fraction
  • Xvo : Oil Volume Fraction
  • Xvw : Water Volume Fraction
  • vg : Gas Mole Volume (At T P)
CALCULATOR : API RP 14E Section 2.5 Fluid Density (Single Phase Gas) [FREE]   ±

Calculate single phase gas density, specific gravity and molar mass.

Gas molar mass is approximately equal to the molar mass of dry air times the gas specific gravity at standard conditions (for most gases the compressibility factor Z is approximately equal to 1 at standard conditions). The molar mass of dry air is taken as 28.964 kg/kg-mole. For gas mixtures, gas specific gravity is easier to measure than the molar mass.

Tool Input

  • fluidtype : Gas Type
    • SGu : User Defined Gas Specific Gravity
  • Z : Gas Compressibility Factor
  • P : Gas Pressure
  • T : Gas Temperature

Tool Output

  • ρ : Gas Density
  • M : Gas Molar Mass
  • R : Gas Constant
  • SG : Gas Specific Gravity
  • vg : Gas Molar Volume (At T P)
CALCULATOR : API RP 14E Section 2.5 Fluid Density (Single Phase Liquid) [FREE]   ±

Calculate single phase liquid density and specific gravity.

For liquids lighter than or equal to water the density can be defined as degrees API, or degrees Baume (Be-). For liquids heavier than water the density can be defined by degrees Baume (Be+), or degrees Twaddell.

Tool Input

  • sgtype : Density Type
    • SGu : User Defined Specific Gravity
    • Be+u : User Defined Degrees Baume SG > 1
    • Be-u : User Defined Degrees Baume SG <= 1
    • Twu : User Defined Degrees Twaddell SG > 1
    • APIu : User Defined Degrees API SG <= 1
    • ρu : User Defined Liquid Density

Tool Output

  • ρ : Fluid Density
  • API : Degrees API SG ≤ 1
  • Be+ : Degrees Baume SG > 1
  • Be- : Degrees Baume SG ≤ 1
  • SG : Specific Gravity
  • Tw : Degrees Twaddell SG > 1
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