How to Calculate and Solve for Separator Gas Gravity in a Fluid | The Calculator Encyclopedia

The image above represents separator gas gravity.

To compute for the separator gas gravity, four essential parameters are needed and these parameters are API Gravity (°API), Actual Separator Temperature (°Rankine) (Tsep), Actual Separator Pressure (Psep) and Gas Gravity at Actual Separator Psep and Tsepg).

The formula for calculating the separator gas gravity:

γgs = γg[1 + 5.912(10-5)(°API)(Tsep – 460)log(Psep / 114.7)]

Where:

γgs = Separator Gas Gravity
°API = API Gravity
Tsep = Actual Separator Temperature (°Rankine)
Psep = Actual Separator Pressure
γg = Gas Gravity at Actual Separator Psep and Tsep

Let’s solve an example;
Find the separator gas gravity with an API Gravity of 21, actual separator temperature of 18, actual separator pressure of 14 and gas gravity at actual separator of 32.

This implies that;

°API = API Gravity = 21
Tsep = Actual Separator Temperature (°Rankine) = 18
Psep = Actual Separator Pressure = 14
γg = Gas Gravity at Actual Separator Psep and Tsep = 32

γgs = γg[1 + 5.912(10-5)(°API)(Tsep – 460)log(Psep / 114.7)]
γgs = 32[1 + 5.912(10-5)(21)(18 – 460)log(14 / 114.7)]
γgs = 32 [1 + 5.912(10-5)(21)(18 – 460) log(0.1220)]
γgs = 32 [1 + 5.912(10-5)(21)(-442) log(0.1220)]
γgs = 32 [1 + 5.912(10-5)(21) (-442) (-0.9134)]
γgs = 32 [1 + 0.501]
γgs = 32 [1.501]
γgs = 48.039

Therefore, the separator gas gravity is 48.039.

Continue reading How to Calculate and Solve for Separator Gas Gravity in a Fluid | The Calculator Encyclopedia