INDEX

Qg 60 mmscfd

Qo 3000 bbl/d

γ 0.75ρ'o 35.0 oAPIγl 0.50

P 514.7 psia

T' 100 oF

T 560 oRt 3 minutesZ 0.9µg 0.012 cP

dm 150 Micron

Step 1: Determine gas and oil propertiesρg 2.07 lb/ft3

ρl 31.2 lb/ft3

Step 2: Determine Cd

Cd 1.10 Assume

u 0.52 ft/sRe 66Cd 1.07

Error 0.00

Step 3: Check for gas capacity constraint

D2 6754 in2

Dmin 82.2 in

Step 4: Check for liquid capacity constraint

d2h 75000

Try different combinations of D.

d, in h, in Ls, ft SR

30 83.3 13.3 5.336 57.9 11.2 3.742 42.5 10.4 3.048 32.6 10.0 2.554 25.7 10.0 2.260 20.8 10.1 2.0

66 17.2 10.3 1.9

72 14.5 10.5 1.8

78 12.3 10.9 1.784 10.6 11.2 1.690 9.3 11.6 1.5

Ls 11.3 ft

SR 3.8D 36.0 in

TABLE 1

TABLE 2 (Ref. API 12J)Retention time,

1

NOTES

Oil Gravities

Above 35 oAPI

1. As per GPSA, typical vertical H/D ratios are normally in the 2 to 4 range.

Slenderness ratio (typical value 3 to 4) (select from Table 1)

Seam to seam length (select from Table 1)

Separator diameter (select from Table 1)

1 to 2

2 to 420 to 30 oAPI

10 to 20 oAPI

Oil density

Operating pressure

Operating temperature

Drag coefficient

Gas operating density

Oil operating density

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SCHEMATIC

Two Phase (Gas - Oil) Vertical Separator: As per "Petroleum and Gas Field Processing - Hussein K. Abdel-Aal, Mohamed Aggour, M. A. Fahim"

EQUATIONS

Retention time (Refer Table 1)

Smallest oil droplet size to be removed

CALCULATIONS

Gas compressibility

Gas viscosity

INPUT PARAMETERS

Oil specific gravity

Operating temperature

Gas rate

Gas specific gravity

Oil rate

Settling velocity of oil dropletReynolds no.

Use goal seek to get error zero, by changing asssumed Cd

Minimum allowable vessel diameter for separation of oil droplets down to 100 micron

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= = 2.7