12 Week Subsurface Mapping And Interpretation Technique Building

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Final Presentation for 12 week hand mapping class.

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12 Week Subsurface Mapping And Interpretation Technique Building

  1. 1. 12 Week Subsurface Mapping and Interpretation Technique Building Laying The Theoretical Foundations And Introducing Techniques To Explore For And Develop Oil And Gas Fields. Joe Dumesnil
  2. 2. Special thanks to: Dr. Stewart Chuber of Fayette Exploration Company AAPG Foundation The friends I have made while here including the entire SCA Company staff and its Partner-Instructors
  3. 3. First 6 Weeks Devoted to Classes <ul><li>Theories and Fundamentals of Structural Geology, Stratigraphy, Mapping, Seismic Acquisition and Processing. </li></ul><ul><li>Classes Included: </li></ul><ul><ul><li>Structural Styles in Petroleum Exploration and Development </li></ul></ul><ul><ul><li>Open Hole Log Analysis </li></ul></ul><ul><ul><li>Seismic Survey Design, Acquisition and Processing </li></ul></ul><ul><ul><li>Principles of 3-D Seismic Interpretation </li></ul></ul><ul><ul><li>Applied Subsurface Geological Mapping </li></ul></ul><ul><ul><li>Basic Reservoir Engineering </li></ul></ul><ul><ul><li>Fundamentals of Seismic Stratigraphy </li></ul></ul>
  4. 4. Second 6 Weeks Devoted to Application of Tools Learned on a Hypothetical Lease <ul><li>Phase 1 </li></ul><ul><ul><li>Initial Exploration, Delineate Prospects, Drill Wildcat </li></ul></ul><ul><li>Phase 2 </li></ul><ul><ul><li>Assess Discovery – Refine Interpretation </li></ul></ul><ul><li>Phase 3 </li></ul><ul><ul><li>Field Development - Refine Interpretation Further </li></ul></ul><ul><ul><li>Explore for additional Prospects on the Lease </li></ul></ul><ul><li>Phase 4 </li></ul><ul><ul><li>Field Performance Analysis </li></ul></ul>
  5. 5. Dip Line - 5
  6. 6. Lead Map – Depth Structure of Frio A Top Note: 1. Line 5 2. Well Tops from previous dry holes
  7. 7. Refined Prospect Depth Structure & Volumetrics 950 Acres 12,350 Ac-Ft 13.561 BCF and 624 MBO Note: Engineering Parameters from Analogous Fields were used for Calculations 13’ Ft Pay, 50% Sw, 24.9 Porosity, 2% Attic, 46B/MM, P-intial 4700 psi, P-abandonment 1000psi, Recovery: 1098 MCF/Ac-Ft
  8. 8. Data Provided after drilling SR #1 <ul><li>1” Logs </li></ul><ul><li>Type Log (provided earlier) </li></ul><ul><li>5” Log (SP, Resistivity and Acoustic) </li></ul><ul><li>Core Data (Core Labs Inc.) </li></ul><ul><li>Synthetic Seismogram </li></ul>
  9. 9. Time Structure Top Frio A
  10. 10. Depth Structure Top Frio A
  11. 11. Fault Surface Map after finding a Bifurcator to the Main Fault
  12. 12. Velocity Gradient Map Integrated with times of a seismic event to get a better approximation of depth structure.
  13. 13. Well Data Stencil Time Conversion from Depth (Frio A, J, U) Depth of Surface (Frio A, J, U) Fault Cuts in Time and Depth
  14. 14. Net Sand Map
  15. 15. Isochore Mapping of Western Frio A Prospect <ul><li>Hand Drawn Version </li></ul><ul><li>Computer Version with Volumetrics </li></ul>1055 Acres 13,715 Ac-Ft 20.089 BCF 904 MBO Note: 13’ Ft of Pay, 40% Sw, 26.5%, 2% Attic, 45 B/MM, P-intial 4650 psi, P-abandonment 1000 psi, Recovery: 1,465 MCF/Ac-Ft
  16. 16. Structural X-Section across Main Fault
  17. 17. <ul><li>Condensed X-section to determine Fault Termination. </li></ul><ul><li>Generalized Relative Scale of Strata for extrapolation below TD of wells. </li></ul>
  18. 18. Stacks of Data Are there more Prospects on our Lease? Remaining 5 of 15 Lines of Seismic in the Area Integrate all Logs to Structural Interpretation
  19. 19. Fault Cuts taken from Seismic lines with Naming Convention Frio A
  20. 20. Updated Fault Surface Map After Receiving All Available Seismic Note that only faults pertinent to the fault blocks that we are prospecting in are included.
  21. 21. 1. Shot Points at which certain faults occur on specified lines. 2. Grid to loop tie Frio A Seismic Event across entire Seismic Grid
  22. 22. Time Structure Top of Frio J
  23. 23. Time Structure of Top Frio U
  24. 24. Eastern Frio A Prospect Depth Structure <ul><li>Hand Drawn Version </li></ul><ul><li>Computer Version with Volumetrics </li></ul>
  25. 25. East of Bifurcator – 1 Time Structure for Top of Frio J
  26. 26. East of Bifurcator – 1 Frio J Prospect <ul><li>Gamma Ray and Resistivity from BTL #19 used to make: </li></ul><ul><li>Net Sand Approximation </li></ul><ul><li>Net/Gross Ratio </li></ul>
  27. 27. East of Bifurcator – 1 Time Structure for Top of Frio U
  28. 28. Eastern side of Bifurcator – 1 with a Frio U Prospect <ul><li>Gamma Ray and Resistivity from BTL #19 used to make: </li></ul><ul><li>Net Sand Approximation </li></ul><ul><li>Net/Gross Ratio </li></ul>
  29. 29. Proposed Deviated / Directional Well Multiple Payzones In The Frio Frio A: ~10,000 Ac-Ft Frio J: ~11,000Ac-Ft Frio U: ~8500 Ac-Ft
  30. 30. Geologic Risk Factors for the Deviated Step Out Exploration Well <ul><li>Frio A </li></ul><ul><ul><li>Trap Geometry – 90% (10% for the Fault Communication) </li></ul></ul><ul><ul><li>Source – 100% </li></ul></ul><ul><ul><li>Migration – 100% (Show in BTL #19) </li></ul></ul><ul><ul><li>Timing – 100% </li></ul></ul><ul><ul><li>Seal – 40% (Seal Analysis on 3 Faults) </li></ul></ul><ul><ul><li>Reservoir – 90% (Pnding Facies changes affecting porosity and perm) </li></ul></ul><ul><ul><li>Preservation – 95% </li></ul></ul><ul><ul><ul><li>POS = 30.78% </li></ul></ul></ul>
  31. 31. Geologic Risk Factor cont. <ul><li>Frio J and U </li></ul><ul><ul><li>Trap Geometry – 85% ( Syncline to Transition Ramp in U?) </li></ul></ul><ul><ul><li>Source – 100% </li></ul></ul><ul><ul><li>Migration – 60% (Producing Fields to East, none to the West) </li></ul></ul><ul><ul><li>Timing – 90% (Find field with analogous fault timing) </li></ul></ul><ul><ul><li>Seal – 50% (Seal Analysis on 3 Faults) </li></ul></ul><ul><ul><li>Reservoir – 90% (Pending Facies changes affecting porosity and perm) </li></ul></ul><ul><ul><li>Preservation – 95% </li></ul></ul><ul><ul><ul><li>POS = 19.62% </li></ul></ul></ul>
  32. 32. Stratigraphic Framework
  33. 33. 3 rd and 4 th Order Sequence Stratigraphy
  34. 34. Beach Barrier / Strandplain Complex Zone of Frio Growth Fault Expansion -7000 GENERAL AREA OF PROJECT -7000
  35. 35. Thank You All Again, Especially, Dr. Stewart Chuber and The AAPG Foundation Questions?
  36. 36. Final Base Map (with all wells that were drilled into the block)

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