Liquid Loading in Gas Wells: Remedial Operations -...
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Transcript of Liquid Loading in Gas Wells: Remedial Operations -...
• Identifying liquid loading• Measuring impact of liquid loading• Finding right solution to unload liquids
Content
“As the velocity of the gas in the productionconduit drops with time, the velocity of theliquids carried by the gas declines even faster.The presence of more liquids accumulating inthe production conduit while the well isflowing can either slow production or stop gasproduction altogether”
James Lea et al. 2008
Identifying liquid loading
Well’s energy depreciation
Multiphase flow
Gas rate below critical value, cannot effectively contribute to transport
liquid to surface, resulting accumulation of downhole liquids!!
Predicting liquid loadingCritical velocity concept
Film reversal theory
Droplet reversal model
J curve method
Liquid loading in gas well Tubing and annulus pressure
Liquid loading in gas well No gas production
Liquid loading in gas well Fluctuation in productions
Liquid loading in gas well
Impairment of gas well
The impact depends: Liquids level in the wellbore Productivity index
The strategies to unload liquids
The strategies to unload liquids
Avoid downhole liquid phase
Venting (kick off) Equalizing (kick off) Cycling Velocity String Capillary String Plunger Lift
Utilizing the well’s energy
More efficient and economical to unload gas wells
Capillary string
Advantage of capillary string
Advantage of capillary string
Velocity string
Advantage of velocity string
Advantage of velocity string
Plunger lift
Plunger lift
Plunger lift
Add energy to well
Vortex ToolSucker Rod PumpESP
Vortex tool
“The path of least resistance for liquid and gas is determined to be of a helical trajectory……”
(G.R Mingaleeva)
Vortex tool
Advantage of vertex tool
Advantage of vertex tool
Comparison
Selection process for liquid unloading
Liquid unloading: Field glimpses
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loading issue, reach us:
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