1. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Advanced Artificial Lift Methods – PE 571 Introduction

2. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Pressure Drop in a Production System

3. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Single Phase Liquid IPR and OPR

4. Advanced Artificial Lift Methods Prepared by Dr. Nguyen 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” Review Single Phase Liquid IPR and OPR

5. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Single Phase Liquid IPR and OPR

6. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Single Phase Liquid IPR and OPR

7. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Single Phase Liquid IPR and OPR

8. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Single Phase Liquid IPR and OPR

9. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Darcy’s Law - IPR

10. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Darcy’s Law - IPR

11. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review IPR – Vogel and Fetkovich

12. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review IPR – Vogel and Fetkovich

13. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Future IPR

14. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review OPR

15. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review OPR

16. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review OPR

17. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review IPR vs. OPR

18. Advanced Artificial Lift Methods Prepared by Dr. Nguyen 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 Review Stability

19. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Fluctuations on the P wh, q system < q steady state Review Stability

20. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

21. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

22. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

23. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

24. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

25. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

26. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

27. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

28. Advanced Artificial Lift Methods Prepared by Dr. Nguyen 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. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability – Tubing Heading High reservoir pressure Small PI Big tubing string

30. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability – Tubing Heading

31. Advanced Artificial Lift Methods Prepared by Dr. Nguyen 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. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability – Tubing Heading Very high PI Big tubing string

33. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability

34. Advanced Artificial Lift Methods Prepared by Dr. Nguyen Review Stability – Casing Heading