Downhole Coring and Sampling, pumpsandpipesmdhc

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Downhole Coring and Sampling, pumpsandpipesmdhc

  1. 1. Pumps & Pipes 1 Downhole Coring and Sampling Fred Palumbo Core Laboratories, LP Petroleum Services Division
  2. 2. New Horizons, Evolving Challenges, Difficult Samples to Acquire! <ul><li>Wells “Pushing” the Technology Envelope </li></ul><ul><ul><li>Higher pressures, temperatures </li></ul></ul><ul><ul><li>Deep formations </li></ul></ul><ul><ul><li>Ultra-Deepwater Wells </li></ul></ul><ul><li>Mud Filtrate Contamination </li></ul><ul><li>Complex hydrocarbons </li></ul><ul><ul><li>Flow assurance issues </li></ul></ul><ul><ul><ul><li>Hydrocarbon Solids </li></ul></ul></ul><ul><ul><ul><li>Heavy Oils </li></ul></ul></ul><ul><ul><li>Compartmentalization </li></ul></ul><ul><ul><li>Fluid Contacts within Sample Interval </li></ul></ul><ul><li>Unconventional Reservoirs </li></ul><ul><ul><li>Heterogeneities </li></ul></ul><ul><ul><ul><li>Alternating rock types, Sand-Shale-Carbonates </li></ul></ul></ul><ul><ul><ul><li>Varied Hardness and Densities, Cemented-Friable-Unconsolidated </li></ul></ul></ul><ul><ul><ul><li>Fractured and Vuggular Rocks </li></ul></ul></ul>
  3. 3. The Importance of Proper Core Processing <ul><li>The reliability of the petrophysical measurements, made in the laboratory, is dependent upon the quality of the core and fluid sampling. </li></ul>
  4. 4. Pumps & Pipes 1 Downhole Reservoir Fluids Sampling Downhole Coring and Sampling <ul><li>Objectives: </li></ul><ul><li>Single Phase Fluid </li></ul><ul><ul><li>In situ Pressure </li></ul></ul><ul><ul><li>Constant Volume </li></ul></ul><ul><ul><li>In situ Temperature </li></ul></ul><ul><li>“ Clean” Sample </li></ul><ul><ul><li>No filtrate </li></ul></ul><ul><ul><li>Downhole Analysis </li></ul></ul><ul><ul><ul><li>Infrared CQ </li></ul></ul></ul><ul><li>Multiple Samples </li></ul><ul><ul><li>Sufficient Volumes </li></ul></ul>
  5. 5. Formation Fluids Test Sampling Core Lab
  6. 6. Pumps & Pipes 1 Drill Cuttings Downhole Coring and Sampling <ul><li>Objectives: </li></ul><ul><li>Formation “Rocks” </li></ul><ul><li>Issues </li></ul><ul><ul><li>Depth Control </li></ul></ul><ul><ul><li>Subjective </li></ul></ul><ul><ul><li>Cross Contamination </li></ul></ul><ul><ul><li>Mechanical Alteration </li></ul></ul><ul><li>Value </li></ul><ul><ul><li>Mineralogy </li></ul></ul><ul><ul><li>Texture </li></ul></ul><ul><ul><li>Continuous Sequence </li></ul></ul>
  7. 7. Pumps & Pipes 1 Percussion Sidewall Coring Tools Downhole Coring and Sampling <ul><li>Rocks at Depth </li></ul><ul><ul><li>On Wire line </li></ul></ul><ul><ul><li>On Drill pipe </li></ul></ul><ul><li>“ Shot” into formation </li></ul><ul><ul><li>Black powder charge </li></ul></ul><ul><li>Multiple Samples </li></ul><ul><ul><li>Groups of 30-50 </li></ul></ul><ul><li>Issues? </li></ul><ul><ul><li>Fractured, Compacted </li></ul></ul><ul><ul><li>“ Mud-shot” </li></ul></ul>
  8. 8. Pumps & Pipes 1 Drilled-Rotary Sidewall Coring Tools Downhole Coring and Sampling <ul><li>Rocks at Depth </li></ul><ul><ul><li>On Wire line </li></ul></ul><ul><ul><li>On Drill pipe </li></ul></ul><ul><li>“ Drilled” into formation </li></ul><ul><ul><li>Controlled parameters </li></ul></ul><ul><ul><ul><li>RPM, Penetration Rate, Weight on bit </li></ul></ul></ul><ul><li>Multiple Samples </li></ul><ul><ul><li>Groups of 30-50 </li></ul></ul><ul><li>Issues? </li></ul><ul><ul><li>Limited to cemented rock </li></ul></ul><ul><ul><li>Otherwise GREAT! </li></ul></ul>Baker Atlas
  9. 9. Rotary Core Receiving Tube
  10. 10. “ Conventional” Coring <ul><li>Continuous Cylindrical Section of formation </li></ul><ul><ul><li>On Drill pipe </li></ul></ul><ul><ul><li>On Wire line </li></ul></ul><ul><li>“ Drilled” into formation </li></ul><ul><ul><li>Controlled parameters </li></ul></ul><ul><ul><ul><li>RPM, Penetration Rate, Weight on bit </li></ul></ul></ul><ul><li>Multiple Lengths, Extended Cores </li></ul><ul><ul><li>30’ intervals (30, 60, 90…) </li></ul></ul><ul><li>Requires proper tool for rock type </li></ul><ul><ul><li>Unconsolidated, Friable, Cemented, Fractured </li></ul></ul><ul><li>Special Barrels </li></ul><ul><ul><li>Inner Sleeves, Sponge Core, Full Closure, Pressure Retained, Oriented Core </li></ul></ul><ul><li>Trip out of the hole requires planning </li></ul><ul><ul><ul><li>“ The Bends” </li></ul></ul></ul>
  11. 11. High Quality Cores Require PLANNING CT image cross-section of 4” OD core in liner Damage due to rapid gas expansion; fast trip Gas bubbles forming “ Critical Gas” bubbles coalescing Tremendous gas expansion
  12. 12.                                            
  13. 13. “ Conventional” Coring Baker Hugh Inteq Coring Mode Core Retrieval Mode Outer Core Barrel Full-Closure Core Catcher Core Bit Core Core
  14. 14. Specialized Coring Tools <ul><li>Wire line Coring </li></ul><ul><li>Coring While Drilling </li></ul><ul><li>Pressure Core System </li></ul><ul><li>Full Closure System </li></ul><ul><li>Oriented Coring </li></ul><ul><li>JamBuster sm Tool </li></ul><ul><li>Sponge Core Barrel </li></ul><ul><li>Gel Coring SM System </li></ul>
  15. 15. Specialized Coring Tools <ul><li>Wire line Coring </li></ul><ul><li>Coring While Drilling </li></ul><ul><ul><li>Sample on demand </li></ul></ul><ul><li>Pressure Core System </li></ul><ul><ul><li>Pressure Retained Barrel </li></ul></ul><ul><ul><ul><li>In situ saturation </li></ul></ul></ul><ul><ul><ul><li>In situ pressure </li></ul></ul></ul>
  16. 16. Specialized Coring Tools Full Closure Systems <ul><li>Full closure catchers and inner barrel liners </li></ul><ul><ul><li>Unconsolidated rocks </li></ul></ul><ul><ul><li>Fractured rocks </li></ul></ul>
  17. 17. Specialized Coring Tools Directional Sampling <ul><li>Oriented Coring </li></ul><ul><ul><li>Directional features </li></ul></ul><ul><ul><li>Fractures, bedding orientation </li></ul></ul><ul><ul><li>Directional-horizontal drilling </li></ul></ul><ul><ul><li>Well placement </li></ul></ul>
  18. 18. Specialized Coring Tool Fractured Reservoirs <ul><li>Sleeved Cores </li></ul><ul><ul><li>JamBuster sm </li></ul></ul><ul><ul><ul><li>Telescoping sleeves </li></ul></ul></ul><ul><ul><ul><li>2 restarts </li></ul></ul></ul>
  19. 19. Specialized Coring Tools Sponge Core Analysis
  20. 20. Specialized Coring Tools Gel Core <ul><li>Sleeved Cores </li></ul><ul><ul><li>Gel Cores </li></ul></ul><ul><ul><ul><li>Minimize filtrate invasion </li></ul></ul></ul><ul><ul><ul><li>Preserve core wettability </li></ul></ul></ul><ul><ul><ul><ul><li>“ fresh-state” testing </li></ul></ul></ul></ul>
  21. 21. Pumps & Pipes 1 Downhole Coring and Sampling The “Future” of Downhole Coring and Sampling VERY Remote Locations! Lunar Polar Coring Lander Department of Aerospace Engineering and Engineering Mechanics The University of Texas at Austin Thank you!

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