Three-Phase-Oil-Gas-Horizontal-Separator.pptx

Project about Three Phase (Gas - Oil) Horizontal Separator

1. OIL& GAS FIELD PROCESSING GE-3167 The project about Three Phase (Gas - Oil) Horizontal Separator Lecturer: Mai Cao L ân Lê Vũ Quang Vinh Vũ Lê Huy

2. Outline 3 The formulas for calculations provide physical explanations for calculations 2 N ames for all parameters in the calculations and design 5 Conclusion 4 Discuss and provide insights into the calculated results and design decisions. 1 Summary about the project. 6 Reference

3. 1/Summary of the project The project give the data: Q L  (Liquid rate) 8000 ( stb /d) GLR  (Gas Liquid Ratio) 1000 ( scf / stb ) WCT  (Water Cut) in the case of 3 phases 25% The composition table of gas mixture The table next to

4. Requirement: +Calculate parameters: Gas deviation factor ( z-factor ), Gas viscosity ( μ g ), Molecular weight of gas mixture ( MW ), Gas specific gravity ( γ g ), Gas rate ( Q g ), Oil rate ( Q o ), Water rate ( Q w ),  without considering  them as  input parameters (given data).

5. the second requirement. CALCULATIONS Step 1: Determine gas and oil properties   ρ g 1.1 lb/ft 3 Gas operating density ρ o 51.5 lb/ft 3 Oil operating density         Step 2:       V a 2.388 ft/s   Q g,a 4.58 ft 3 /s Actual volume flow of gas A g,min 1.92 ft 2 Minimum gas flow area D min 2.4 in Assume A g,min 1.92 ft 2   Error 0.00     D selected 78 in Next larger (than D min ) and appropriate size L 18 ft Shell length L / D 2.8 unitless Refer Note 4         Step 3:         V 77 bbl Liquid volume (excluding bottom head) W 11036 bpd Liquid capacity of separator should be more than 11000 bpd (input value)

6. Project 5D                             Three Phase (Gas - Oil) Horizontal Separator: As per API 12J                             INPUT PARAMETERS                 Q g   mmscfd Gas rate   Yellow boxes are input boxes.   SCHEMATIC   Q o   bbl/d Oil rate               Q w 3000 bbl/d Water rate               γ 0.70   Gas specific gravity               ρ' o 40 o API Oil density               γ o 0.83   Oil specific gravity               P 250 psia Operating pressure               T' 60 o F Operating temperature               T 520 o R Operating temperature               MW   lb/lbmole Molecular weight                 L 18 ft Shell Length (assume)               t o 5 minutes Oil retention time (Refer Table 2)               t w 5 minutes Water retention time (Refer Table 2)               Z     Gas compressibility               µ g   cP Gas viscosity             K 0.35 ft/s Refer Table 1               N LL 50%   Normal liquid level (assume)            

7. 2/ N ames for all parameters in the calculations and design Gas specific gravity γ Water rate Q w gas flow rate, MMSCFD or ft 3 /s Q g Gas compressibility Z Molecular weight MW oil flow rate, bbl /day Q o Gas viscosity µ g T & T’ Operating temperature L Shell Length (assume) t o Oil retention time t w Water retention time N LL Normal liquid level (assume) ρ g Gas operating density ρ o Oil operating density Q g,a Actual volume flow of gas A g,min Minimum gas flow area L Shell length V Liquid volume (excluding bottom head) W Liquid capacity of separator should be more than 3000 bpd (input value)

8. 3/ The formulas for calculations provide physical explanations for calculations Finding ( Q g , Q o, Qw ) Finding ( µ g ) Finding ( MW ) Finding ( Z ) Finding ( γ ) a b c d e

9. a/Find the Q g , Q o, Qw First we find Water rate (Q w ) with the given data: QL (Liquid rate) = 8000 (stb/d), GLR (Gas Liquid Ratio) = 1000 (scf/stb) Result:

10. Using Q w and Q L , we can find Q o : Result: With Q g we can use this formula: Result:

11. a/ Find ( MW ) Formula: Component provided: Result:

12. a/ Finding ( γ ) Formula: Result:

13. a/ Finding ( Z - factor ) Before finding Z factor, we find these components: Result:

14. Using the components, we can get the z-factor with this formula: Result:

15. a/ Find ( µ g ) Find the component gas viscosity using the data provided: Result:

16. µ r formula Result:

17. Gas mixture viscosity formula: Result:

18. 4/Discuss and provide insights into the calculated results and design decisions. - Viscosity - Molecular weight of gas mixture

19. 5/Conclusion With Dmin=2.4in, Dselected=180in, L=40ft, the value of V=174 bbl, and W=25053 bpd is suitable for this separator.

20. https://e-learning.hcmut.edu.vn/pluginfile.php/565034/mod_resource/content/1/Thu%20gom%20%20Van%20chuyen%20DK-4th%20week%20PDF%20for%20students.pdf Petroleum Production Engineering- A Computer-Assisted Approach (2007 _ 6/Reference Sep_2015_Gas-Liquid-Separators-Sizing-Parameter-MM083015 Separator Sizing ( Petrowiki )