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Reservoir Characterization

Reservoir Characterization. Capstone Project Semester 1 PNG 490 – Team 26 April 29 th 2014. Goals and Objectives. D iscretize and map the given formations A nalyze log data Calculate expected recoverable oil in place Recommend further action with the field. Findings.

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Reservoir Characterization

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  1. Reservoir Characterization Capstone Project Semester 1 PNG 490 – Team 26 April 29th 2014

  2. Goals and Objectives • Discretize and map the given formations • Analyze log data • Calculate expected recoverable oil in place • Recommend further action with the field

  3. Findings • Based upon the data: • 100 - 270 Million Barrels • 100 Dollar per Barrel comes out 10 – 27 Billion Dollars • Further develop the selected area

  4. Procedure

  5. Geological Structure • Penta Alpha was formed in the early cretaceous period • Predict the ability to produce oil • Types of lithology • Limestone , sandstone, and minimal shale deposits • Types of obstacles • Drilling Break, and kick • Pay zone rocks • Sandstone

  6. Discretization Process • Analyzing contour map • Drawing grids • Construct surface map • Surface Map of Penta Alpha Formation

  7. 3-D Surface Map Surface Map of Penta Alpha Formation

  8. Evaluating Well logs • Establish cut-offs • Water saturation < .7 or 70% • Gamma ray < 40 API • Resistivity > 10 ohm-meters • Determine Net Pay

  9. Well log data gathering • From porosity, water saturation and net pay thickness • Determine maximum, minimum and average values • Three distribution maps of porosity, water saturation and net pay thickness

  10. Average Water Saturation Interpolation

  11. Average Porosity Interpolation • Average Porosity Interpolation

  12. Net Pay Interpolation • Net Pay Thickness Interpolation

  13. Monte Carlo Stimulation • Calculate Values within set ranges for: • Recovery Factor of 0.2 to 0.4 • Formation Volume Factor of 1.05 – 1.08 • Calculated OOIP ranged • 375 – 675 million barrels • Calculated recoverable oil • 100 – 270 million barrels

  14. Moderate Estimate (50% confidence)

  15. Conservative Estimate (90% confidence)

  16. Area of Interest • Determine the areas with higher barrels per acres from recoverable oil in place • P50 stimulation • area of 3643 acres and produce around 34 million barrels. • P90 stimulation • area of 3643 acres and produces around 18.5 million barrels

  17. Area of Interest 50 Percentile

  18. Area of Interest 90 Percentile

  19. Cumulative Oil in Place

  20. Cumulative Recoverable Oil

  21. Conclusion • Valued at approximately 10 – 27 billion US Dollars • A well drilled every 640 acres should be suitable in this situation • Potential revenue should be attributed to a water saturation cut off of 70% • Recommend entering phase two of drilling and preparing wells for production

  22. Reference • Alsharhan, A.S., and A.E.M. Nairn. Sedimentary Basins and Petroleum Geology of the Middle East. N.p.: Elsevier Science & Technology, 1997. Print. • Canty, Daniel. "Enhanced Oil Recovery Leaders in the Middle East." Arabianoilandgas. ITP Bussiness Publishing Ltd., 11 June 2012. Web. 17 Apr. 2014. • Doveton, John H. "Basic Well Log Analysis: Reading Rocks from Wireline Logs." SEPM Shore Course No.29. 7 Apr. 2014. Lecture.

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