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Gas-Lift Design OutlineC ti Fl Design FactorsContinuous FlowIPO Valves
Equilibrium curveConstant Rate
Design Factors
Injection PressureConstant Rate (optimum gradients)
Variable Rate
PPO Valves
Valve Size: 1.5” or 1”
Port?PPO ValvesVariable rate
Dual Wells
Port?
Opening & Closing pressures
Diff ti l V l
Intermittent LiftIPO Valves: unloading
Spacing Factors
Differential Valves
Others?
Spacing FactorsFall-back
Pilot Operating Valve
Gas-Lift Design: Breakout----Joe Clegg1
Gas-LiftDesign
Static
Valve type
Flowing
Valve typeSizeSeat/PortTEFOpeningpressure
Gas-Lift Design: Breakout----Joe Clegg2
Equilibrium Curve
Juch;Neely;BlannBlann
Gas-Lift Design: Breakout----Joe Clegg3
AGL_SPAC: GAS LIFT SPACING2000
1500
2000
)
IPO Valves: Constant rate design
1000
1500
URE
(psi
)
500PRE
SS
U
0
0 1000 2000 3000 4000 5000 6000 7000 8000 9000
DEPTH (ft) or (meters)GAS INJ TBG SPACING
Gas-Lift Design: Breakout----Joe Clegg4
Optimun Gradient GraphsDesign graphs for:Wellhead Pressure = 100 psig2.441” tubing,GLR = 750 cu.ft/barrelGas Injection Pressure = 1000 psiKill fluid gradient = 0 465 psi/ftKill fluid gradient = 0.465 psi/ft
Gas-Lift Design: Breakout----Joe Clegg5
INJECTION PRESSURE VALVE SPACING DESIGNExample # 2000
Variable rate
1600
ar)
1200
(psi
) or (
ba
800
RES
SUR
E (
400PR
00 1000 2000 3000 4000 5000 6000 7000 8000
DEPTH (ft) of (meters)
INJ GAS TBG Temp VALVE SPACING
Gas-Lift Design: Breakout----Joe Clegg6
Blann & Winkler
Gas-Lift Design: Breakout----Joe Clegg7
IntermitentGas-LiftGas LiftDesign--Gas-LiftManual
Gas-Lift Design: Breakout----Joe Clegg8
GAS LIFT VALVE SPACING1000
600
800
or
(bar
) Intermittent Gas-Lift Design
400
600
URE
(psi
)
0
200
PRES
SU
0
0 1000 2000 3000 4000 5000
DEPTH (ft) or (meters)DEPTH (ft) or (meters)GAS INJ TBG SPACING
Gas-Lift Design: Breakout----Joe Clegg9
GAS LIFT VALVE SPACINGD l W ll PPO valves
2400
2800
(bar
)
Dual Well PPO valves
12001600
2000
(psi
) or
400
800
1200
SSU
RE
0
400
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
PRES
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
DEPTH (ft) or (meters)GAS INJ TBG SPACINGGas-Lift Design: Breakout----Joe Clegg10
IPO Valves
Gas-Lift Design: Breakout----Joe Clegg11
Conclusions
Gas-Lift Design: Breakout----Joe Clegg12
