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Improved Oil Recovery in Mississippian Carbonate Reservoirs of Kansas DE-FC22-93BC14987

Improved Oil Recovery in Mississippian Carbonate Reservoirs of Kansas DE-FC22-93BC14987. Timothy R. Carr, Dana Adkins-Heljeson, Saibal Bhattacharya, Alan P. Byrnes, Evan K. Franseen, Paul Gerlach, Willard (Bill) Guy, Richard Pancake, and W. Lynn Watney. Kansas Challenges.

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Improved Oil Recovery in Mississippian Carbonate Reservoirs of Kansas DE-FC22-93BC14987

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  1. Improved Oil Recoveryin Mississippian Carbonate Reservoirsof KansasDE-FC22-93BC14987 Timothy R. Carr, Dana Adkins-Heljeson, Saibal Bhattacharya, Alan P. Byrnes, Evan K. Franseen, Paul Gerlach, Willard (Bill) Guy, Richard Pancake, and W. Lynn Watney

  2. Kansas Challenges • Small Independent Producers • 3,000 Oil and Gas Operators • Wells (33,104 wells < 5 BOPD) • Low Rate, High Water Cut • Inadequate Reservoir Characterization • Drilling and Completion Design Problems • Low Recovery Factors • Non-Optimal Primary Recovery • Operations at or Near Economic Limits

  3. Kansas Approach • Develop Cost-Effective Technologies • Reservoir Description and Management • Using “best” data • Evaluation Methods • Spreadsheet log analysis software (PfEFFER) • Online Dissemination • Information • Technology • Demonstration • Horizontal Drilling • Infill Drilling

  4. Large Potential Target Regan & Granite Pennsylvanian (Virgilian) 2 % 3 % Pennsylvanian (Missourian) ARBUCKLE 23 % 32 % Pennsylvanian (Desmoisian) 8 % Mississippian Pennsylvanian (Morrow) 19 % 3 % Upper & Middle Pennsylvanian Ordovician (Other) 8 % Hunton 1 % 1 % Total Production 6.6+ Billion Barrels

  5. Large Potential Target

  6. Ness County, Kansas • Numerous Targets • Regional Level

  7. Schaben Field

  8. Schaben: Vertical Sequence

  9. Reservoir FaciesSkeletal Wackestone - Packstone Ritchie 2 Schaben P

  10. Depositional Model

  11. Petrophysical Analysis Super Pickett Plot Reservoir Porosity Saturation Pay Height BVW Perforation: 4400-4404 Produced 85 bopd & 132 bwpd

  12. PfEFFER

  13. Remaining Oil Saturation • Poor Lateral Drainage

  14. Reservoir Simulation Infill Drilling Targets So > 40% & Payheight > 20 ft.

  15. Schaben Field Production

  16. Horizontal Wells • Tools for Identifying Candidate Applications • Production Data Analysis • Geologic Mapping • Integration of Production and Geologic Data • Field & Lease Level Volumetrics • Reservoir Characterization/Simulation • Field Demonstration - Horizontal Infill Well • Completed and Planned

  17. IntegratingProduction & Geologic Data Poor Sweep - Vertical Wells in Updip Stratigraphic Trap Welch-Bornholdt- Wherry Field Rice County Kansas

  18. Field Level Volumetrics OOIP/Qtr Section Welch-Bornholdt-Wherry Fields Discovered: 1924 Producing Reservoir: Mississippian Osage Trap Type: Stratigraphic Cumulative Production: 60 MMBO Original Oil in Place per Quarter Section CI: 500 MBO / qtr. section Using data from one type well per 1/4 section = 10 MMBO = 5 MMBO

  19. Field Level VolumetricsRecovery Efficiency Recovery Efficiency per Quarter Section CI: 2% Welch-Bornholdt-Wherry Fields = 18% = 2%

  20. Ness County, Kansas • Numerous Targets • Regional Level

  21. Ness City North Field • Numerous Targets • Local Level

  22. Reservoir CharacterizationGeologic Model Geologic model: log (Gr, Res), core, production, DST data Maps & cross-sections of Mississippian sub-units: 5 layered reservoir model

  23. Reservoir CharacterizationGeologic Model

  24. Reservoir SimulationMapping Residual Potential

  25. Reservoir Heterogeneity • Strong Horizontal Heterogeneity • 10’ - 100’ Interval • Karst Controlled • Result Poor Lateral Drainage

  26. Initial Production IP: 85 BOPD & 54 BWPD (4/29/00) Daily Prod: 55 BO& 50 BW for 2-1/2 months (May to mid-July) with1000’ of fluid over pump

  27. Complete Production Loss

  28. Lessons Learned • Operational Flexibility (Maintain Your Options) • New Well vs. Reentry • Hole Size • Drilling Fluids • Case off the Curve • Line the Lateral • Good Planning • Communication • “The Lateral is a Piece of Cake” • Horizontal Heterogeneity

  29. Ness City North Production

  30. Well and Production Data Ness City North Schaben

  31. Ness City North

  32. Well and Production Data

  33. Gemini Modular Approach Gemini User/Project Module Field Level Analysis Applets Well Level Analysis Applets Volumetrics Module Well Profile Module Cross Section Module KGS Server apache - jserv PfEFFER Module Material Balance Module Java Servlets DST Module KGS Database & Files Synthetic Seismic Module PVT Module Fluid Catalog KHAN Rock Catalog Rock & Fluid Characteristics Applets

  34. Gemini -Well Profile Module Table: Formation Name Type GEMINI_USER_KID N(10) WELL_HEADER_KID N(10) ZONE_NUMBER N(6) API_NUMBER V(40) TYPE_OF_ZONE N(2) FORMATION_NAME V(40) DATA_SOURCE V(40) START_DEPTH N(8,2) END_DEPTH N(8,2) DATE_MODIFIED D PFEFFER_KID N(10)

  35. Gemini -PfEFFER Module Table: Pfeffer_Computed Name Type PFEFFER_KID N(10) BUTTON N(2) BUTTON_ORDER N(4) BUTTON_SELECTED N(2) LAS_KID N(10) RADIO_BUTTON N(2) CURVE_NUMBER N(4) CURVE_MNEMONIC V(100) VALUE N VALUE2 N CORRECTED N(2) CORRECTED_VALUE N TRACK N(2)

  36. Gemini -Volumetric Module

  37. Kansas Approach • Develop Cost-Effective Technologies • Reservoir Description and Management • Using “best” available data • Evaluation Methods • Spreadsheet log analysis software (PfEFFER) • Online Dissemination • Information • Technology • Demonstration • Horizontal Drilling • Infill Drilling

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