asme/api gas-lift workshop
DESCRIPTION
ASME/API Gas-Lift Workshop. 12 – 13 th November 2001 Aberdeen, Scotland. Predicting Future Gas Lift Performance in a Mature Water Flooded Field. Tony Liao & Simon Bishop , BP. Miller Field. Location of Miller Field. Miller Field Background. Discovered in late 1982 - PowerPoint PPT PresentationTRANSCRIPT
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ASME/API Gas-Lift Workshop12 – 13th November 2001
Aberdeen, Scotland
Predicting Future Gas Lift Performance in a Mature
Water Flooded Field
Tony Liao & Simon Bishop, BP
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Miller Field
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Location of Miller Field
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Miller Field Background
>Discovered in late 1982>Oil was found 4,000 meters beneath the seabed
in a water depth of 100 meters>The field lies 270km NE of Aberdeen>Estimated 240 million barrels of recoverable oil
and 480 billion cubic feet of associated gas
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Miller Field Background
>Oil production commenced in May 1992 >Gas production following about two months
later>Brae field has been on production since 1983>Reservoir pressure in Miller has declined while
Brae has been produced
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Objective
>Predict performance of Miller field if 4 of 9 naturaly flowing wells are converted to gas lifted
>Provide BU and partners performance data to make production management decision
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Study Methodology
>Match production & injection history of Miller field
> Integrate reservoirs, wells, and surface network in a completed system
>Tune well models against well test data>Generate vertical lift performance (VLP) curves
for all naturally flowing & gas lifted wells>Generate well IPR curves>Generate well performance curves based on VLP
& IPR curves>Predict field performance under different
operation strategies and system constraints
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Miller Field Schematic
23
4
5
6
1
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Multi-Reservoir Model Consideration
>Pressure data showed distinct trend in each compartment
>Geological description clearly supported a multi-tank system
>Single tank Mbal model was tested but history match was not as good
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Miller Multi-Reservoir Mbal Model
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History Matching: Southern Tank
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Simulation
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Application of Integrated Model
>Forecast production from every well, every tank, and the entire reservoir
>Forecast water injection to each tank>Evaluate the impact of converting certain wells
to gas lift at a specified time
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Miller Integrated Model: Production Forecast
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Gas Lift Well Performance Curves
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Application of the Integrated Model
0 1 2 3 4 5 6 7 85400
5500
5600
5700
5800
5900
6000
6100
6200psig
Years
Tank Pressure, Reservoir by Case
MIL_V1 ( Southern co ) MIL_V1GL ( Southern co )
Monday, April 10, 2000 - 12:14 PM
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Application of Integrated Model
0 1 2 3 4 5 6 7 860
61
62
63
64
65
66
67
68
69
70
71
72
73MMSTB
Years
Tank Oil, Cumulative by Case
MIL_V1 ( Central ) MIL_V1GL ( Central )
Monday, April 10, 2000 - 12:07 PM
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Conclusion
>Converting four wells from naturaly flowing to gas lifted will be beneficial for the Miller field
>Cumulative oil production incremental is 1 MMB over 4 years
>Integrated study provided Miller Business Unit with technical results required for reservoir management decision