Optimization of Oil Production
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Transcript of Optimization of Oil Production
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Optimization of Oil Production
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introduction• Ane Cecilie Duus
• Optimization of oil production
• Supervisor: Sigurd Skogestad
• Co-Supervisors: Chriss Grimholt & Johannes
Jäscke
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Troll west rig
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Why Relevant?
• In existing reservoirs 50% oil stay unrecovered.
• Increase by 1% can increase value by 10-20 billion NOK.
• Most potential lies in production technology.
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Project:
1. Modelling the system
2. Finding optimal well pressures
3. Finding candidates for self-optimizing CV’s
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Model1. Wells
2. Manifold
3. Production Pipe
4. Separator pressure
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1. Well Preformance Curves
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3. Pressuredrop Relations
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Optimization
Objective function:
Maximize oil flow in production line
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Objective Function
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Result: Optimal Well Pressures
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Effect of disturbance?
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Self-optimizing variables
• Implementing disturbance in well compositions
• Applying the Null Space Method
• Loss evaluation:3 times less than without
control
• Potential for further work on control structures