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

Last Updated on March 8, 2024

To calculate the separator gas gravity, four essential parameters are needed, and these parameters are API Gravity (°API), Actual Separator Temperature (°Rankine) (T_sep), Actual Separator Pressure (P_sep), and Gas Gravity at Actual Separator P_sep and T_sep(γ_g).

The formula for calculating the separator gas gravity

γ_gs = γ_g[1 + 5.912(10^-5)(°API)(T_sep – 460)log(^P_sep / _114.7)]

Where:

γ_gs = Separator Gas Gravity
°API = API Gravity
T_sep = Actual Separator Temperature (°Rankine)
P_sep = Actual Separator Pressure
γ_g = Gas Gravity at Actual Separator P_sep and T_sep

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
T_sep = Actual Separator Temperature (°Rankine) = 18
P_sep = Actual Separator Pressure = 14
γ_g = Gas Gravity at Actual Separator P_sep and T_sep = 32

γ_gs = γ_g[1 + 5.912(10^-5)(°API)(T_sep – 460)log(^P_sep / _114.7)]
That is, γ_gs = 32[1 + 5.912(10^-5)(21)(18 – 460)log(¹⁴ / _114.7)]
γ_gs = 32 [1 + 5.912(10^-5)(21)(18 – 460) log(0.1220)]
γ_gs = 32 [1 + 5.912(10^-5)(21)(-442) log(0.1220)]
So, γ_gs = 32 [1 + 5.912(10^-5)(21) (-442) (-0.9134)]
γ_gs = 32 [1 + 0.501]
Then, γ_gs = 32 [1.501]
γ_gs = 48.039

Therefore, the separator gas gravity is 48.039.

Read more: How to Calculate and Solve for Petrosky-Farshad Gas Solubility Parameter | The Calculator Encyclopedia

How to Calculate Separator Gas Gravity in a Fluid Using The Calculator Encyclopedia

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the separator gas gravity.

To get the answer and workings of the separator gas gravity using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

Web – https://www.nickzom.org/calculator-plus

To get access to the professional version via web, you need to register and subscribe for NGN 1,500 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Petroleum under Engineering

Now, Click on Fluid Properties under Petroleum

Now, Click on Separator Gas Gravity under Fluid Properties

The screenshot below displays the page or activity to enter your values, to get the answer for the separator gas gravity according to the respective parameters which are the API Gravity (°API), Actual Separator Temperature (°Rankine) (T_sep), Actual Separator Pressure (P_sep) and Gas Gravity at Actual Separator P_sep and T_sep(γ_g).

Now, enter the values appropriately and accordingly for the parameters as required by the API Gravity (°API) is 21, Actual Separator Temperature (°Rankine) (T_sep) is 18, Actual Separator Pressure (P_sep) is 14 and Gas Gravity at Actual Separator P_sep and T_sep(γ_g) is 32.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the separator gas gravity and presents the formula, workings, and steps too.