Review of Gas Lift Design
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PH PSep4
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H Sep
5
3
P3C P3t
PSO
Wight of GasColumn
GLRn
GLRt
Pv2
Pv1
Pr-Pwf= q/J
Pwf - P3t= Pv2
P3t Pwh = Pv1
Pwh PSep = PH
2 1
Pr
Pwf
P3C = PSO + Weight of gas column
P3t = P 3C - Pvalve (approx. 100 psi)
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Fig. 2
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Fig 2
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hhhhhhhhh
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Fig 3
Where R = (Ap/Ab), can be determined from Table Il for different valve and port sizes.
Table II
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Table II
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and (e)
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Fig 3
(4) Use Fig. 4 to get a match for G/L ratio in the section of the tubing above the point of
gas injection. Iterate for G/L to satisfy the condition ofPwh = 200 psi. 'and Pwf= 1410 psi at a
depth of 5500 ft. On doing this, the best fit is obtained for a GLR = 400 scf/bbl
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Fig. 4
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Fig 3
