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Advanced Artificial Lift Methods – PE 571 Introduction

Advanced Artificial Lift Methods – PE 571 Introduction. Review. Pressure Drop in a Production System. Review. Single Phase Liquid IPR and OPR. Review. Single Phase Liquid IPR and OPR.

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Advanced Artificial Lift Methods – PE 571 Introduction

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  1. Advanced Artificial Lift Methods – PE 571 Introduction

  2. Review Pressure Drop in a Production System

  3. Review Single Phase Liquid IPR and OPR

  4. Review Single Phase Liquid IPR and OPR The flowrate value at which a specific well flows for a set of operational conditions using only the energy stored in the compressed reservoir fluids is called “natural equilibrium flowrate”

  5. Review Single Phase Liquid IPR and OPR

  6. Review Single Phase Liquid IPR and OPR

  7. Review Single Phase Liquid IPR and OPR

  8. Review Single Phase Liquid IPR and OPR

  9. Review Darcy’s Law - IPR

  10. Review Darcy’s Law - IPR

  11. Review IPR – Vogel and Fetkovich

  12. Review IPR – Vogel and Fetkovich

  13. Review Future IPR

  14. Review OPR

  15. Review OPR

  16. Review OPR

  17. Review IPR vs. OPR

  18. Review Stability Stable equilibrium: small disturbance around the equilibrium point, the system will move back to the equilibrium condition. Unstable equilibrium: If the disturbance is large enough, the system will move towards another equilibrium point or loose the equilibrium permanently

  19. Review Stability Fluctuations on the Pwh, qsystem < qsteady state

  20. Review Stability

  21. Review Stability

  22. Review Stability

  23. Review Stability

  24. Review Stability

  25. Review Stability

  26. Review Stability

  27. Review Stability

  28. Review Stability Several techniques might be used when the system reaches to the unstable point such as: If the well has an artificial lift installed it can be put into production to help the well overcome the unstable point. After that if the artificial lift is not required we can leave the well under natural flow. If the well does not have an artificial lift installed, we can do several things: Agitation, swab, gas injection, nitrogen injection …

  29. Review Stability – Tubing Heading • High reservoir pressure • Small PI • Big tubing string

  30. Review Stability – Tubing Heading

  31. Review Stability – Tubing Heading If the fluctuations are small then the well will produce a steady state flowrate. If the fluctuations are large, the production in this well will cycle with time. This is called the tubing heading. Tubing heading is characterized by pulsating well head pressure (EX: caused by slug flow) and constant casing pressure. It occurs mostly in wells fitted with a packer during the final stage of life. During this period, liquid is lifted through a portion of the tubing and then falls back resulting a cycle flow. Under these conditions, the production test data from this well are very difficult to match the IPR and OPR simulations.

  32. Review Stability – Tubing Heading • Very high PI • Big tubing string

  33. Review Stability

  34. Review Stability – Casing Heading

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