Production from oil rims
Inflow profile to (a) conventional HW and (b) High Technology Well
In (a) well inflow profile distributed unevenly because of pressure drop along the well. As a result, earlier water and gas breakthrough in the heel region. In case (b) inflow profile is equalized.
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Oil rim |
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Oil rim |
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Water 
Water
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Pressure drop |
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Pressure drop |
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Well length |
Well length |
Part II - Well completion design
Prepared by Alexey Khrulenko, 2010
Intrawell gas lift
1.Gravel pack.
2.Pressure and temperature sensors on the outer side of production tubing;
3.Packers;
4.Pressure and temperature sensors on the inner side of production tubing;
5.ICV controlling gas rate to production tubing
Energy of gas cap is used to lift the oil
Examples of application:
Troll (Norsk Hydro, North Sea) – optimization of production from the oil rim
Abqaiq (Saudi Aramco) – securing the well flowing with high watercut
Fram Vest (Norsk Hydro, North Sea) – managing high well head pressure for increased oil production
Norne (Statoil, North Sea) – securing the subsea well flowing as an alternative to ESP or conventional gas lift application
Egret (Shell, Bruney shelf) – same + managing high well head pressure for stable transport of oil from subsea asset to a stationary platform
Part II - Well completion design
Prepared by Alexey Khrulenko, 2010
HTW: commingled production from 3 reservoirs, Na-Kika field, GOM
Vertical cross-section
Fourie field, Na-Kika project
Plots of cumulative oil production for commingled (red) and sequential (blue) production scenarios
September 21, 2013 |
PetParoleumtII - WellPolicycompletionand Operations,design |
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Alternating gas production
Layout is similar to that for intrawell gas lift. Used for securing increased gas production rates if required for a higher consumption. In this case deliverability of ICV to control production from the gas interval should be higher than required for the intrawell gas lift.
Oil production. Gas interval shut in |
Gas production. Oil interval shut in |
Examples of |
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Vestflanken (Norsk Hydro, North Sea) |
application: |
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Brent Charlie (Shell, North Sea) |
•Prepared by Alexey Khrulenko, 2010 |
Part II - Well completion design |