PVT Tutorial
Oil Calculations
Oil Formation Volume Factor
Input:
-
Solution gas-oil ratio (Rs - scf/STB) in the range
of 20-2000
-
Gravity of stock-tank oil (API - degree API)
-
Gas Gravity (Air equals 1)
-
Reservoir temperature (T- degree F) in the range of
100 - 560
Click Calculate button
Output:
You can now Save, Exit or Print the result.
Once you Exit you can do another calculation or Exit from
Oil Formation Volume Factor or click Reference for Help
Coefficient Of Isothermal Compressibility of Saturated
Black Oils
Select either Bubble point pressure is known, Bubble point
pressure in unknown or Neither bubble point pressure nor solution gas-oil
ration is known, then click Next (or Exit if you want to quit).
Input:
-
Reservoir Pressure (p - psia) (500 - 5000) range
-
Gravity of stock-tank oil (API - degree API) (20-50)
range
-
Reservoir temperature (T - degree F) (100 - 340) range
-
Solution gas-oil ratio (Rs - scf/STB) (150 - 2000) range
-
Bubble-point pressure (Pb - psia) (if you selected Bubble
point pressure is known from previous screen)
-
Weighted average of separator Gas (Air - 1) (only if you
selected Neither bubble point pressure nor solution gas-oil ration
is known from the previous screen)
Click Calculate button
Output:
You can now Save, Exit or Print the result.
Once you Exit you can do another calculation or Exit from
Oil Formation Volume Factor or click Reference for Help
Dead and Saturated Oil Viscosities calculations
Input:
-
Gravity of stock-tank oil (API - degree API) (5 - 58)
range
-
Reservoir temperature (T - degree F) (60 - 175) range
-
Click checkbox if you want to Calculate Saturated Oil
Viscosity then enter the Solution gas-oil ratio (Rs - scf/STB) (20 - 2000)
range
Click Calculate button
Output:
You can now Save, Exit or Print the result.
Once you Exit you can do another calculation or Exit from
Oil Formation Volume Factor or click Reference for Help
Water Calculations
Compressibility of Brine
Input:
-
Reservoir Pressure (P - psia) (1000 - 20000) range
-
Salinity (S - mg/litre) (0 - 200000) range
-
Reservoir temperature (T - degree F) (200 - 270) range
Click Calculate button
Output:
You can now Save, Exit or Print the result.
Once you Exit you can do another calculation or Exit from
Oil Formation Volume Factor or click Reference for Help
Viscosity of Water
Input:
-
Salinity (S - weight % solids)
-
Reservoir temperature (T - degree F) (86.5 - 167)
-
Click checkbox if you want to Calculate water viscosity
at P psia then enter Reservoir Pressure (P - psia) (<=14000)
Click Calculate button
Output:
You can now Save, Exit or Print the result.
Once you Exit you can do another calculation or Exit from
Oil Formation Volume Factor or click Reference for Help
Gas Calculations
Gas Formation Volume Factor
Input:
-
Reservoir Pressure (P - psia)
-
Reservoir temperature (T - degree F)
-
Click checkbox if you want to Calculate Z then enter
Gas gravity (Air = 1) and Click Calculate Z
-
Compressibility factor (Z - no units) (if you didn't
calculate Z)
Click Calculate Button
Output:
- Gas Formation Volume Factor (Bg - res bbl/stb)
You can now Save, Exit or Print the result.
Once you Exit you can do another calculation or Exit from
Oil Formation Volume Factor or click Reference for Help
Gas Compressibility (under construction)
Calculation of Viscosity of Natural Gas at 1 atm
Input:
-
Mole percent N2 (yN2 - mole percent) (0 - 100)
-
Mole percent CO2 (yCO2 - mole percent) (0 - 100)
-
Mole percent H2s (yH2S - mole percent) 0 - 100)
-
Gas gravity (Air = 1)
-
Reservoir temperature (T - degree F) (100 - 560)
Click Calculate Button
Output:
You can now Save, Exit or Print the result.
Once you Exit you can do another calculation or Exit from
Oil Formation Volume Factor or click Reference for Help.
To Close PVT Calculator click on X at the upper right of Applet.
This page updated June 2003
Comments to webadmin@kgs.ku.edu
The URL for this page is HTTP://www.kgs.ku.edu/Gemini/Help/PVT/PVTtutorial.html
