The writers undertook laboratory study for the purpose of examining relation between factors affecting f factor in gas lift well.
By the results of the experiment, writers obtained the equation,
f=aρb
where f is f faxtor; ρ is fluid density; a and b are the function of the flow rate of liquid and the inside diameter of lift pipe, respectively.
By application of the equation, writers are able to calculate f factor for a much wider range of gas-oil-ratio.