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GAS LIFT

Gas lift is a method of artificial lift that uses an external source of high-pressure gas for supplementing formation gas to lift the well fluids. The principle of gas lift is that gas injected into the tubing reduces the density of the fluids in the tubing, and the bubbles have a “scrubbing” action on the liquids.
A Gas Lift is suitable for lifting the fluids present in a well. It is a method in which gas is infused into the well to reduce hydrostatic pressure of the fluids and help the reservoir fluids to enter into the wellbore with a higher flow rate. The gas being injected is generally transmitted down the casing-tubing annulus which enters the production train via numerous gas valves. The gas lift valves are simple devices with few movable parts

Gas Lift System Advantages
– High degree of flexibility and design rates
– Wireline retrievable
– Handles sandy conditions well
– Allows for full bore tubing drift
– Surface wellhead equipment requires minimal space
– Multi-well production from a single compressor
– Multiple or slim hole completion

Gas Lift System Disadvantages
– Needs high-pressure gas well or compressor
– One well leases may be uneconomical
– Fluid viscosity
– Bottom hole pressure
– High back-pressure

Gas Lift System Application Considerations

Typical Range Maximum
Operating Depth 5,000 to 10,000 ft TVD 15,000 ft TVD
Operating Volume 100 to 10,000 BPD 30,000 BPD
Operating Temperature 100 to 250°F 400°F
Wellbore Deviation 0 – 50° 70° short to medium radius

Corrosion Handling Good to excellent with upgraded materials

Gas Handling Excellent
Fluid Gravity Best in >15°API

Servicing Wireline or work over rig

Prime Mover Type Compressor

Offshore Application Excellent

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Houston, TX 77043, USA

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