How to Calculate and Solve for Solution Gas – Oil Ratio of a Reservoir Fluid Flow | The Calculator Encyclopedia

The image above represents a Gas – Oil Ratio. To calculate for the gas – oil ratio, seven essential parameters are needed and these parameters are Solution Gas (R_s), Oil Viscosity (μ_o), Gas Viscosity (μ_g), Relative Permeability to Gas (k_rg), Relative Permeability to Oil (k_ro), Gas Formation Volume Factor (B_g) and Oil Formation Volume Factor (B_o). 

The formula for calculating the gas – oil ratio:

GOR = R_s + [^k_rg /  _kro] [^μ_oB_o / _μgBg]

Where;

GOR = Solution Gas-Oil Ratio
R_s = Solution Gas
μ_o = Oil Viscosity
μ_g = Gas Viscosity
k_rg = Relative Permeability to Gas
k_ro = Relative Permeability to Oil
B_g = Gas Formation Volume Factor
B_o = Oil Formation Volume Factor

Let’s solve an example;
Find the Gas – Oil Ratio with a solution gas of 11, oil viscosity of 7, gas viscosity of 9, relative permeability to gas of 12, relative permeability to oil of 16, gas formation volume factor of 22 and oil formation volume factor of 18.

This implies that;

R_s = Solution Gas = 11
μ_o = Oil Viscosity = 7
μ_g = Gas Viscosity = 9
k_rg = Relative Permeability to Gas = 12
k_ro = Relative Permeability to Oil = 16
B_g = Gas Formation Volume Factor = 22
B_o = Oil Formation Volume Factor = 18

GOR = R_s + [^k_rg /  _kro] [^μ_oB_o / _μgBg]
GOR = 11 + [12/16] [7 x 18 /9 x 22]
So, GOR = 11 + [12/16] [126/198]
GOR = 11 + [12/16] [0.63]
GOR = 11 + [0.75] [0.63]
That is, GOR = 11 + 0.477
GOR = 11.477

Therefore, the Gas – Oil Ratio is 11.477.

Read more: How to Calculate and Solve for Total Oil Pore Volume of Reservoir Fluid Flow

How to Calculate Solution Gas – Oil Ratio of a Reservoir Fluid Flow Using The Calculator Encyclopedia

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the gas – oil ratio.

To get the answer and workings of the gas – oil ratio 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 Reservoir Fluid Flow under Petroleum

Now, Click on Gas – Oil Ratio under Reservoir Fluid Flow

The screenshot below displays the page or activity to enter your value, to get the answer for the gas – oil ratio according to the respective parameter which are the Solution Gas (R_s), Oil Viscosity (μ_o), Gas Viscosity (μ_g), Relative Permeability to Gas (k_rg), Relative Permeability to Oil (k_ro), Gas Formation Volume Factor (B_g) and Oil Formation Volume Factor (B_o).

Now, enter the value appropriately and accordingly for the parameter as required by the Solution Gas (R_s) is 11, Oil Viscosity (μ_o) is 7, Gas Viscosity (μ_g) is 9, Relative Permeability to Gas (k_rg) is 12, Relative Permeability to Oil (k_ro) is 16, Gas Formation Volume Factor (B_g) is 22 and Oil Formation Volume Factor (B_o) is 18.

Finally, Click on Calculate

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