This document provides a tutorial on designing an intermittent gas lift system to produce an oil well that was not previously producing. It demonstrates how to input pressure, temperature, and fluid property data into software. It then shows how to model the downhole tubing and casing configuration, generate an inflow performance relationship curve, and simulate gas lift using multiple valves to reduce wellhead pressure and allow production. The software output verifies that the designed gas lift system enables the well to produce by intersecting the inflow and valve lift performance curves.

1. PROSPER TUTORIAL
ON
INTERMITTENT GAS LIFT
Presented By:
Chaitanya Deshmukh
Sayali Musmade

2. HOME SCREEN

3. Double click on System Summary
Here u can add the name of the company and all other user information
Click on Done

4. Now double click on Pvt Data
Add the values. For solution GOR value is 200, Oil gravity 28, Gas Gravity 6 and Water
Salinity 1,00,000.
Click on Match Data

5. Add the temperature value as 170 and bubble point 1650
In the table below, add the pressure value as 1650, Gas oil rate 200, Oil FVF 1,098,
and oil VISCOSITY 2.5.
Then click on Done

6. Now click on Regression.
Then click on Match All.
Now you all can see the PVT match in the Green box
Click on Main

7. Double click on Equipment Data
Select all data except Surface equipment as we are interested in subsurface data
Click on Edit.

8. In the measured depth column add 1st 0 and 2nd value 7500, similarly in true vertical
depth column as 1st value o and 2nd 7500
Click Done

9. Click on a cell below the Xmas tree and select tubing and again click on the cell below tubing and select casing.
Now in the measured depth column add tubing value as 7400 and casing value 7500, In Column tubing inside
dia., in the row of tubing add value as 1.703. In Column of casing inside dia., in the row of casing add value as 6.1
Click on Done

10. In Formation measured depth column add 1st value o and 2nd value 7500.
In Formation temperature column add 1st value 60 and 2nd 170.
Add the value of Over heat transfer coefficient as 3
Click on done

11. Click on Done
Click on summary

12. Click on Draw Downhole

13. This the Design of downhole tubing and casing
Click on Main

14. Now Double click on IPR Data
Select the Reservoir model as PI entry then add the value of reservoir pressure 1800, reservoir temp. 170,
water 90 .
Then click on input data

15. Add value of Productivity Index PI as 1
Click on Calculate

16. This is IPR plot
Click on Main

17. Now click on Calculation, then on System(ipr+vlp) and then on 3 variables

18. Add top node pressure 50
Click on Continue

19. In variable 1 select blank box and click on continue

20. Click on calculate
Click on plot

21. This is IPR and VLP plot
They are not intersecting means well is not producing
so now we have to use Artificial lifting for well to produce
Click on Finish

22. Let's do one more check. In variable 1 select the Water cut option. now add the
values as 0 ,10, 20, 30,....upto 90 and click on continue

23. Click on Calculate.
Still, in the solution part, we can't see any data which means well is not producing
Click on plot

24. This graph indicate same that well is not producing
Click on Main

25. Double click on System summary. In artificial lift select Gas lift (intermittent)
Click on Done

26. Double click on equipment data and select downhole equipment.
Click on edit
In tubing row add the value of tubing inside dia as 2.375 and casing inside dia 6.1
Click on Main

27. Double click on Intermittent Gas lift input data
Surface injection pressure is 1500, injection depth is 7000, gaslift gravity is 0.6, wellhead pressure is 50, Valve port size is 22,
water cut is 80 and tubing liquid level is 4500
Click on Done

28. Now click on Design and select Intermittent Gas lift option

29. Click on calculate

30. Now we have to design the valve
click on valve and select constant surface closing pressure

31. Now add the values
Surface injection pressure is 1500, unloading fluid gradient is0.45, Spacing Factor is 0.2, Wellhead pressure is 50,
surface closing pressure is 1300, and max injection depth is 7000
Click on calculate

32. This show position of valve
Click on Done

33. Now, lets check whether well is producing or not.
Click on System 3 variable and click on continue
Click on Plot

34. So here we can see IPR and VLP are intersecting this indicate well is producing

35. Thank You