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<< Click to Display Table of Contents >> Gas Lift |
  
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<< Click to Display Table of Contents >> Gas Lift |
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Simple Gas Lift
The following items may be edited on the General Gaslift Properties Panel:
MEASURED DEPTH OF GAS INJECTION (ft): The measured depth of the operating valve. The program assumes that enough pressure is available to inject the desired rate at this depth.
SURFACE INJECTION PRESSURE (psia): The gas lift injection pressure at the surface. For the injection point specified in the previous variable, the program calculates the required surface pressure which is compared to the specified injection pressure.
Injection Gas Volume Options:
GAS LIQUID RATIO (scf/bbl): The ratio of the total gas volume including both gas lift gas and formation gas to the total liquid volume produced.
INJECTION GAS RATE (mscfd): The rate of lift gas injection.
Injection pressure, Depth, and resulting rate utility:
The controls on the right are for testing depth of gas injection versus surface injection pressure and predicted flow rates.
For the case above, the sliders are testing the depth of injection at 6816 feet, which results in a GL injection pressure of 1398 psia and 619 blpd production rate.
When you first select one of the controls, SNAP runs a series of cases to determine how much pressure is required to lift at different depths, and what rate is available at that lift depth. The Blue bar fills the up as higher rates are obtained.
This utility is designed to lead the user to selecting target injection depth and GL injection pressures that best meet their needs. If you are not concerned with these parameters, there is no need to use these controls.
Advanced options are provided to test specific models and as-yet unproven technology.
The more complex Gas lift Design panel requires additional data.