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Gulf Coast Stacked Storage SECARB Phase II Test #1

Gulf Coast Stacked Storage SECARB Phase II Test #1. SECARB Stakeholders’ Meeting Atlanta GA March 18-19, 2008. Susan Hovorka, Tip Meckel, F. Wang, H. Zeng, J. Paine, JP Nicot Gulf Coast Carbon Center Bureau of Economic Geology The University of Texas at Austin. Partners.

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Gulf Coast Stacked Storage SECARB Phase II Test #1

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  1. Gulf Coast Stacked StorageSECARB Phase II Test #1 SECARB Stakeholders’ Meeting Atlanta GA March 18-19, 2008 Susan Hovorka, Tip Meckel, F.Wang, H. Zeng, J. Paine, JP Nicot Gulf Coast Carbon Center Bureau of Economic Geology The University of Texas at Austin

  2. Partners • Bureau of Economic Geology, Jackson School of Geosciences, UT-Austin • Denbury Resources • Schlumberger CO2 • Southern Company • Mississippi State University • University of Mississippi GCCC Team: Sue Hovorka, Tip Meckel, Fred Wang, Hongliu Zeng, Jeff Paine, J. P. Nicot,

  3. Geographic Focus of SECARB Program Mississippi Interior Salt Basin Province OK MS Source of large volumes of CO2 via existing pipelines AR TX Proven hydrocarbon seals Sabine Uplift AL DRI pipelines FL Cranfield LA Plant Daniel

  4. LA MS I-55 Cranfield Unit operated by Denbury Resources Brookhaven DRI pipeline US 84 Hurricane Lake Mallalieu NATCHEZ Adams Franklin Non-Tusc Fields Miss. River

  5. Unitized boundary Well < 7,000 ft Structure contour top Tuscaloosa sand OBS 29-12 INJ

  6. Well 29-12: New Injector Average H: 283 md V: 47 md Average H: 20.5 % V: 20.7 % INJECTION ZONE

  7. 3-1/2" 10.2 ppf 13 Chrome tubing w/VAM TOP connections 1/4" TEC cable; 16 gauge single conductor encapsulated in 1/4" tubing 16" casing set @ 222' 10-3/4" casing set @ 1,825' Current depth 9,580’ Proposed Monitoring Zone 13-Chrome Isolation packer w/ feed throughs 13-Chrome Selective seat nipple Pressure transducer Side Pocket Mandrel w/dummy gas valve 1/4" tubing installed between packers to Provide a conduit btwn isolation packers CO2 Injection Zone 13-Chrome Production packer w/ feed thrus 13-Chrome No Go seat nipple Tuscalusa perforation Pressure transducer Side Pocket Mandrel w/dummy gas valve 7" casing set @ 10,305'

  8. Above-zone monitoring to document no well leakage Monitoring Interval Regional Seal Local Seals Cored Interval Injection Interval

  9. NORTH SOUTH EAST WEST

  10. W-E OBS 29-12 S-N Cranfield Anticline ~ 1 mile

  11. 29-12: New Injection Well Ella G. Lees #7 Observation Well Vernon Johnson #2: Phase 3 area

  12. Seismic amplitude tied to well logs

  13. Stratal Slices, 90-degree data

  14. 30 Hz stratal slice injection interval Stratal Slice Frequency Content 50 Hz stratal slice injection interval

  15. Phase II Monitoring Goals • Document pressure propagation preceding CO2 plume • Time lapse bottom-hole pressure in pattern – numerous wells • Pressure has returned to near pre-production – unique conditions for an oil field • Complex fluid mixture – oil +methane+ brine • Measure fluid composition change –sweep efficiency • Determine effectiveness of available tools • Document efficiency of Mississippi oil and gas law in retaining CO2 • Wells drilled in 1940-1950, P&A 1965 • Cement behind casing in injection zone • Evaluation – reentry or soil gas survey • Above zone monitoring program – pressure - fluid if needed

  16. Phase II Tool Selection • Dedicated observation well • Three mechanical packer – two perforation zone completion • Two downhole pressure/temperature Panex gauges – high reliability • Real-time readout • Episodic logging • Limited fluid sampling • Array of time-lapse monitoring between injector and producers • Model match/ compared to response in dedicated observation well • Logging program – measure sweep efficiency • Programmatic value • Improved capacity estimate • Increase skill in measurement of pressure response preceding plume • Document well integrity

  17. Special thanks to those working in the field.

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