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Case Study – Reducing Drilling hours by up to 54% in the Barnett Shale

Case Study – Reducing Drilling hours by up to 54% in the Barnett Shale. Douglas Gust P.Eng., Q’Max Solutions Inc. Scott Marquess, Q’Max Solutions Inc. Lane Dunham, Savanna Drilling USA March 31, 2009. Barnett Shale Drilling Optimization Project. Introduction Project Scope Achievements

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Case Study – Reducing Drilling hours by up to 54% in the Barnett Shale

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  1. Case Study – Reducing Drilling hours by up to 54% in the Barnett Shale Douglas Gust P.Eng., Q’Max Solutions Inc.Scott Marquess, Q’Max Solutions Inc.Lane Dunham, Savanna Drilling USA March 31, 2009

  2. Barnett Shale Drilling Optimization Project • Introduction • Project Scope • Achievements • Conclusions

  3. Project Overview • GOAL – Reduce well construction cost - $/ft • Scope of Project • Build on what others had done – bits/directional etc. • Optimization of Drilling Fluid • “Solids Free Drilling Fluid” – “SFDF” • Solids Control • Waste Management • Reduction of hole sizes • “New Technology Drilling Rigs” – NTDRs • Time Frame • 20 month project 3Q 2006 to 1Q 2008

  4. SFDF • Solids Free <1% suspended solids • Density up to 10.5 ppg in solution • Typically 8.8 – 9.5 ppg – averaged 9.2 ppg on this project • Inhibitive • Used Calcium Nitrate or Production Brine • Easily converted to Polymer fluid when necessary • Well control – densities > 10.5 ppg • Low rheology – Low ECD • Viscosity = 28 to 31 • YP = 1 to 3 • 100% reusable

  5. Solids Control – MudStripper™ Designed for SFDF • Remove 99.5% drill solids • Footprint = 15’ x 60’ • Operates as “Closed Loop” • Sludge density range: • 14.5 to 17.5 ppg Shaker Cuttings MudStripper™ Sludge

  6. Old Style Pit 150’ x 100’ x 6’ 14,000 bbls Sludge Pit 30’ x 12’ x 8’ 500 bbls Auger Tank Solids collection / Dump truck disposal Cuttings Handling

  7. Hole size Reduction Surface hole Reduced from 12 ¼” to 8 ¾” Reduced Casing from 9 5/8” to 7” Main Hole Reduced from 7 7/8 – 8 ¾” to 6 1/8” Reduced Casing from 7” to 4 ½” Benefits Reduced cuttings volume Reduced cement volume Lower cost casing Increased casing availability Concerns ROP Tool Reliability Cement quality Well Construction

  8. NTDR – “New Technology Drilling Rig” Integrated top drive / pipe handling system Some rigs drill with coil tubing Small footprint Fast moving (12 to 15 loads) Benefits Safety – reduced risk for crews Improved ROP Drill with Coil No connections Drill with Range 3 pipe Smaller location sizes Fast Rig up/Tear down Shorter move times NTDR

  9. Accomplishments • 41% reduction in average Drilling Hours • 226 hours/well to 133 hours/well • 41% reduction in average Well Days • 20 days/well to 12.5 days/well • 83% reduction in average Fluid Volume • 10,000 bbls/well to 1,729 bbls/well • 100% reduction in Dilution Volume • Dilution was eliminated • 75% reduction in surface area of drilling site • 400 ft x 400 ft to 200 ft x 200 ft

  10. Average Drilling Hours • Project Start • 226 hours/well • Conventional Rig – 44 wells • 155 hours/well • NTDR – 96 wells • 123 hours/well • Best 2 rigs – 34 wells • 103 hours/well • One NTDR w/ & w/o SFDF • 31 wells w/SFDF • 131 hours/well • 7 wells w/o SFDF • 153 hours/well

  11. Average Days / Well • Project Start 20 days/well • 157 wells 12.5 days/well • SFDF • 149 wells 11.9 days/well • 97 wells NTDR 10.5 days/well • 77% of wells < 15 days

  12. Average Drilling Performance • Average Performance based upon “well days” 670 ft/day • SFDF 700 ft/day • Best 2 Rigs 848 ft/day NOTE: Op #2 calculated from assumed 10,000 ft well depth and days from Spud to TD

  13. Drilling Performance by Bit Diameter

  14. Fluid Volume Reduction • SFDF & MudStripper™ is a “Closed Loop” system • SFDF is 100% reusable • Reduced hole sizes reduces volumes • Seepage loss • Fluid on cuttings

  15. Reduced Location Size • Location reduced from 400’ x 400’ to 200’ x 200’ • 75% reduction in surface area • NTDR • Small footprint • MudStripper™ • “Closed Loop” system with small footprint

  16. Conclusion • KEY Success Factors • Project Integration & Execution • SFDF • NTDR • Hole Size Reduction • Significant reduction in $/ft achieved • Some individual costs (product and services) increased • Variable cost – time related decreased • Some costs (casing) decreased

  17. Conclusion – Project Milestones

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