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- the formation fluid deliverability (the ability of reservoir to produce or take-in the fluid) which is called Inflow Performance Relation (IPR)
and
- wellbore fluid deliverability (the ability of well to lift up or lift down the fluid) and which is called Vertical Flow Lift Performance (VFPVLP) or Tubing Performance Relation (TPR)
...
It is based on correlation between surface flowrate
and bottomhole pressure
as a function of tubing-head pressure
and formation pressure
and current reservoir saturation.
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- Check the current production rate against the production target from FDP
- If the diffference is big enough to justify the cost of production optimization (see point 8 below) then proceed to the step 3 below
- Assess formation pressure based on well tests
- Simulate IPR /VFP VLP based on the current WOR/GOR
- Calculate the stabilized flow bottom-hole pressure
- Gather the current bottom-hole pressure
- Check up the calculation aganst the actual
- Recommend the production optimisation activities to adjust bottom-hole pressure :
- adjusting the choke at surface
- adjusting the pump settings from surface
- changing the pump depth
- changing the tubing size
- changing the pump
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