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Case Study : History Matching of Well by Predictive Material Balance

Case Study : History Matching of Well by Predictive Material Balance. Term Project : Advanced Reservoir Engineering. Presented By, Namit J Jaiswal B.E (Chemical). December 18, 2003 Fairbanks, Alaska. OUTLINE. What is history matching ? Methods used for history matching Case description

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Case Study : History Matching of Well by Predictive Material Balance

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  1. Case Study : History Matching of Well by Predictive Material Balance Term Project : Advanced Reservoir Engineering Presented By, Namit J Jaiswal B.E (Chemical) December 18, 2003 Fairbanks, Alaska

  2. OUTLINE • What is history matching ? • Methods used for history matching • Case description • Solution Scheme • Results • Conclusion and Recommendation

  3. What is history matching ? History Matching is the procedure for determining parameters in a reservoir model from observed production data.

  4. History Matching Levels of aquifer support Bypassed zone identification Process in reservoir Paths of fluid migration

  5. TYPES • Manual • Automatic

  6. Well K, Zone 1 K, Zone 2 5-6 5.1 4.0 8-16 8.3 6.8 9-13 11.1 6.0 14-12 8.1 7.6 Case Description Reservoir type: Volumetric under saturated reservoir Connate water: 37 % Porosity: 21.5 % Drained Area by each well: 40 acres Thickness of pay zone was given by isopach maps of both zones. Laboratory core permeability measurements

  7. Solution Scheme • Model Development • Initialization • History Matching

  8. Model Development Flow equation Oil In place Material Balance Tracy’s Model

  9. Oil In-Place

  10. Material Balance Calculation of these

  11. Equation cont.

  12. Equation cont. Compare and iterate

  13. Flow Equation

  14. 2. Model Initialization Given DATA Permeability ratios PVT data Isopach Plots Production History Permeability data for cores

  15. History Matching Modified Parameter kg/ko kro H Absolute permeability

  16. DATA Average Absolute Permeability to Air (md) Average Thickness of Pay zone (ft) Capacity (ft) WELL Zone (1) Zone (2) Zone (1) Zone (2) Zone (1) Zone (2) 5-6 5.3 4.1 8.2 13.3 43.46 54.53 Results (5-16 Well )

  17. DATA Average Absolute Permeability to Air (md) Average Thickness of Pay zone (ft) Capacity (ft WELL Zone (1) Zone (2) Zone (1) Zone (2) Zone (1) Zone (2) 8-16 8.3 6.6 10.5 11.0 87.15 72.6 Result Well (8-16)

  18. DATA Average Absolute Permeability to Air (md) Average Thickness of Pay zone (ft) Capacity (ft) WELL Zone (1) Zone (2) Zone (1) Zone (2) Zone (1) Zone (2) 9-13 11.1 6 15 11 166.5 66 Result Well (9-13)

  19. DATA Average Absolute Permeability to Air (md) Average Thickness of Pay zone (ft) Capacity (ft) WELL Zone (1) Zone (2) Zone (1) Zone (2) Zone (1) Zone (2) 14-12 8 7.5 6 11 48 82.5 Results Well (14-12)

  20. Conclusion Reasonable and Defendable Model Tarner Tracy is fine for this problem

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