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Given a tubing head pressure
the
WFP Junction Point will be dynamic in time depending on current formation
npressure pressure (see Fig. 2) and formation saturation
(see Fig.
3).
Image Added | Image Added |
Fig. 2. A sample case of stablised flow rate as function of formation pressure. | Fig. 3. A sample case of stablised flow rate as function of formation water saturation and corresponding production water-cut.
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Workflow
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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 then proceed to the next step
- Assess formation saturation in pay zones based on well tests
- Assess formation pressure based on well tests
- 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
The above workflow is very simplistic and assumes single-layer formation with no cross-flow complications.
IPR – Inflow Performance Relationship
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