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Schlumberger EOR Competition
The Le'afPresented by: Chan Y Loon
Floyd Goh
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Executive Summary
Net Present Value (NPV) : 389 541 571Incremental NPV : 95 244 400 (32%)EOR Method/s used : Water + Polymer InjectionOil Recovery : 41.5 %Wells: - Producers: Existing – 9, Additional - 3- Injectors : 7 No. of Production Years: 25 years 5 months
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Agenda
ExecutiveSummary
InitialReservoir Condition
FutureProductionConstraints
DevelopmentStrategy
OutputProfiles
Conclusion
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Initial Reservoir Condition
Oil Saturation Map
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Initial Reservoir Condition
Number of Wells:- Oil Producers: 7- Gas Producers: 2Recovery Factor: 12%Oil Production Rate: 300 STB/DayInitial Reservoir Pressure: 5287.6 psia at GOCInitial Oil in Place: 26 MM STB
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Future Production Constraint
Additional of Wells:- Well conversion/addition- Fault existence
Field Production Constrains- Maximum Oil Production Rate: 2100 STB/Day- Minimum Oil Production Rate: 200 STB/Day
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Development Strategy
Reservoir Studies
Well Location &
Arrangement Pattern
Types of Well Determinatio
n
IOR / EOR Methods
used
Economic Value
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Development Strategy
Reservoir Studies
Well Location &
Arrangement Pattern
Types of Well Determinatio
n
IOR / EOR Methods
used
Economic Value
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Well Location & Well Arrangement
7 – Point & Inverse 4 – Point System
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Development Strategy
Reservoir Studies
Well Location &
Arrangement Pattern
Types of Well Determinatio
n
IOR / EOR Methods
used
Economic Value
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Types of Well Determination
Less costly- Vertical Well: $ 1M- Horizontal Well: $ 3M
Theoretically, horizontal well is higher in efficiency.- However, our simulation show horizontal well has lower recovery.
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Development Strategy
Reservoir Studies
Well Location &
Arrangement Pattern
Types of Well Determinatio
n
IOR / EOR Methods
used
Economic Value
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IOR & EOR Methods Used
Natural Drive : Water & GasImproved Oil Recovery : Water InjectionEnhanced Oil Recovery: Polymer
Why Polymer is Chosen?- Improved front displacement.- Reduced water cut. - Reduced the contrasts in permeability by plugging high permeability zones.
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Development Strategy
Reservoir Studies
Well Location &
Arrangement Pattern
Types of Well Determinatio
n
IOR / EOR Methods
used
Economic Value
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Economic Value
Gas Production12%
Oil Produc-tion88%
Income
Water Production
34%
Polymer Injected11%Water Injection
24%
Water Injection Well Set-up
3%
New vertical wells8%
Operating Cost21%
Costs
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Output ProfilesOIL PRODUCTION
No future action
Optimum case
Constant production for 9 years
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Output ProfilesRECOVERY FACTOR
Optimum case
No future action
Increased Recovery Factor by 20%
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Output ProfilesRESERVOIR PRESSURE
Optimum case
No future action
Maintained reservoir pressure
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Output ProfilesWATER CUT
Optimum case
Water Cut Reduced
No Further Action
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Conclusion
Net Present Value (NPV) : 389 541 571Incremental NPV : 95 244 400 (32%)EOR Method/s used : Water + Polymer InjectionOil Recovery : 41.5 %Wells: - Producers: Existing – 9, Additional - 3- Injectors : 7 No. of Production Years: 25 years 5 months
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Thank You
