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- wellbore fluid deliverability (the ability of well to lift up or lift down the fluid) and which is called OPR or TPR or VFP (equally popular throughout the literature)
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- Setting up the required production or injection regime for each well upon the current formation pressure, reservoir saturation and production target specified by FDP
- Generating VFP tables as input for 3D simulations
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- OPR – Outflow Performance Relation ( also called TPR – Tubing Performance Relation and VFP – Vertical Lift Performance (VFP) ) – responsible for well deliverability (see below )
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The intersection of IPR and OPR VFP curves represent the stabilized flow (see Fig. 1)
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| Fig. 1. The stablised flow rate is represnted as junction point of WFP – Well Flow Performance and OPR curves. | Fig. 2. The dead well scenario. |
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In practise, the WFP – Well Flow Performance analysis is often very tentative and production technologists spend some time experimenting with well regimes on well-by-well basis.
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OPR – Outflow Performance Relation
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OPR – Outflow Performance Relation also called TPR – Tubing Performance Relation and VLP – Vertical Lift Performance represents the relation between the bottom-hole pressure
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p_{wf} = p_{wf}(q) |
which may be non-linear.
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References
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Joe Dunn Clegg, Petroleum Engineering Handbook, Vol. IV – Production Operations Engineering, SPE, 2007
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