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OPTIMIZING ARTIFICIAL LIFT WITH SURFACE MULTIPHASE BOOSTING
- 1. How Twin ScrewMultiphase Pumps Supplement Artificial Lift Luis Martinez P.Eng. MBA Email: lmartinez@leistritzcorp.com Optimizing Artificial Lift with Surface Multiphase Boosting
- 2. 2 Optimizing Artificial Liftwith Surface Multiphase Boosting
- 3. 3 Almost all domesticwells are on some kind of artificial lift (ESP, Rod Pumps, Gas Lift, Plunger Lift) • Artificial lift products can underperform due to viscous oil, gas locks and the gathering system back pressure • The result is lost and unpredictable production, high maintenance and work over costs • Surface Multiphase boosting can address these problems and contributes to a number of advantages for any gathering system on artificial lift Optimizing Artificial Lift with Surface Multiphase Boosting
- 4. 4 Agenda I. Advantages andtechnology background of surface multiphase boosting systems II. Benefits of the combination of artificial lift with surface multiphase boosting III. Applications of multiphase boosting in oil and gas fields Optimizing Artificial Lift with Surface Multiphase Boosting
- 5. 5 I. Advantages andtechnology background of surface multiphase boosting systems Optimizing Artificial Lift with Surface Multiphase Boosting
- 6. Overall Advantages withMultiphase Pumping • Increase hydrocarbons production and total recovery by improving well inflow/outflow performance • Make up for fast declining reservoir pressure and mitigate slugging and surging wells • Reduce the gathering system back pressure to allow and maintain plateau production • Minimize facility footprint, limit exposure to flaring and GHG releases and reduce overall complexity • Allow remote multiphase pad production to reach central processing and lowering CAPEX and OPEX • Able to handle varying flow regimes and terrain induced slugging • Improved flow assurance with heavy and waxy crudes and operation in cold weather (hydrate mitigation) Optimizing Artificial Lift with Surface Multiphase Boosting
- 7. Multiphase Pumps Technologies Roto-dynamicpumps Positive displacement pump Optimizing Artificial Lift with Surface Multiphase Boosting
- 8. Roto-dynamic pumps Positivedisplacement pumps low high Low Inlet Pressure GVF Viscosity Density low high Favorable operating conditions shown in green Pump Technology Characteristics Optimizing Artificial Lift with Surface Multiphase Boosting
- 9. Twin Screw MultiphasePump 9 Optimizing Artificial Lift with Surface Multiphase Boosting
- 10. Multiphase Pumping Principle 10 Pumpingliquids Compressing gas Gas Liquid Slip (enlarged for illustration purposes only) P P L L Qo Q S S Q = Qo – S Q = Actual flow Qo = Theoretical Flow S = Slip Optimizing Artificial Lift with Surface Multiphase Boosting
- 11. Multiphase Pumping Performance 11 OptimizingArtificial Lift with Surface Multiphase Boosting
- 12. Multiphase Pumping Performance 12 OptimizingArtificial Lift with Surface Multiphase Boosting Design Point Design Point
- 13. 13 Gathering Facility Reduction withMPP Eliminate and simplify production facilities and handle transient and unstable flow regimes from horizontal wells (put back pump jacks) Conventional Production Multiphase Pumping Optimizing Artificial Lift with Surface Multiphase Boosting
- 14. MPP System 14 Optimizing ArtificialLift with Surface Multiphase Boosting
- 15. Typical Leistritz GatheringSystem Electric Motor Liquid Knockout Boot Pilot Operated Relief Valve Discharge Header ESD Ball Valve Suction Header ESD Ball Valve Basket Strainer Gauge Panel Auxiliary Junction Box Main Junction Box Plan 54 Seal Oil System w/Air Cooler Leistritz Multiphase Pump Optimizing Artificial Lift with Surface Multiphase Boosting MPP SYSTEM
- 16. 16 II. Benefits ofthe combination of artificial lift with surface multiphase boosting Optimizing Artificial Lift with Surface Multiphase Boosting
- 17. 17 Optimizing Artificial Liftwith Surface Multiphase Boosting • Increased down-hole pump submergence • Higher static liquid level improved NPSH (a) • Gas stays in solution • Operation above bubble point • Increase production rate Lowering WHP = To Battery (via MP Pipeline) MPP System Surface Header Down Hole Pump Liquid Level Annular / Casing Gas Production Tubing
- 18. 18 Optimizing Artificial Liftwith Surface Multiphase Boosting Q (flow rate) P (buttonhole pressure) Inflow performance Outflow without MPP Outflow with MPP 1 2 Q1 Q2 P1 P2 Production rate increment Pressure drawdown
- 19. 19 Optimizing Artificial Liftwith Surface Multiphase Boosting Q (flow rate) P (wellhead pressure) Inflow performance Outflow without MPP Outflow with MPP 1 2 Q1 Q2 P1 P2 Production rate increment Pressure drawdown N0 MPP operating points via speed control
- 20. 20 Optimizing Artificial Liftwith Surface Multiphase Boosting Change in Production Reduction in FWHP Inflow 1 Outflow 1 2 Inflow 2 • Increased down-hole pump submergence • Higher static liquid level improved NPSH (a) • Gas stays in solution • Operation above bubble point Lowering WHP =
- 21. Gathering System with MultiphasePumps Enhance production from low pressure well and extend plateau production with a multiphase pump: • Increase total recovery • Reduce total production time 21 With Multiphase Pumping Plateau Production Shortened Production Time Optimizing Artificial Lift with Surface Multiphase Boosting PRODUCTION RATE Extra Recovery Original Expected Recovery
- 22. Simulator Run andNodal Analysis of the Gathering System • Two satellites evaluated: (SF-21 & SF-44). • Wells on ESP and rod pumps. Rod pumps on pump-off control. • Uptime increased close to 100%. • The results in added production: SF-21: 359 bopd. SF-44: 235 bopd. 22 Optimizing Artificial Lift with Surface Multiphase Boosting
- 23. 32 Wells onArtificial Lift Flowing Through Multiphase Pump MPP • Increased production by approximately 30% • WHP when MPP running • 100 psi (690 kPa) • Suction • 300 psi (2070 kPa) • Discharge • WHP when MPP down • 180 psi (1240 kPa) 23 FORECAST VS ACTUAL PRODUCTION Optimizing Artificial Lift with Surface Multiphase Boosting
- 24. 24 UNLOADING GAS LIFTEDWELL (MPP DBU Application) Optimizing Artificial Lift with Surface Multiphase Boosting
- 25. 25 Manifold CP-1391 = responsibleper 3.4% of Oil Production of the Carmópolis Field Well/Artificial Lift Method Pwh before (kgf/cm2) Pwh after (kgf/cm2) Pcasing before (kgf/cm2) Pcasing after (kgf/cm2) Sub before (m) Sub after (m) CP-1464/SRP 11 5 9,4 4,4 130 265 Increasing of the downhole pump submergence CP-1461/ESP 20 8 9,3 4 0 90 Reduction of the motor current—10% (less DP required on ESP) and increasing of the ESP submergence Flowing Studies Steady State and Transient Model Optimizing Artificial Lift with Surface Multiphase Boosting
- 26. 26 III. Applications ofmultiphase boosting in oil and gas fields Optimizing Artificial Lift with Surface Multiphase Boosting
- 27. On-Shore Gathering System 27 OptimizingArtificial Lift with Surface Multiphase Boosting
- 28. Off-Shore Gathering System 28 OptimizingArtificial Lift with Surface Multiphase Boosting
- 29. 29 Casing Gas Compression OptimizingArtificial Lift with Surface Multiphase Boosting
- 30. Gas well –Blow Down Unit 30 Optimizing Artificial Lift with Surface Multiphase Boosting
- 31. 1. Normally flowingthrough V2 and V3 2. Well gets liquid loaded. Flow drops and V3 closes 3. Plunger drops and MPP gets ready to start. 4. After preset time (=plunger drop),V1 & V4 open, V2 closes and the MPP starts 5. MPP draws gas and liquids from tubing and lubricator and pumps it to the annulus. 6. Plunger reaches the lubricator pushed and pulled by the MPP 7. V3 opens and V4 closes and MPP flows down stream 8. When steady flow is reached MPP stops, V1 closes and V2 opens. Well now flows freely. Plunger Assist Multiphase Pump PAMP Multiphase Pumping for Liquid Rich Basins TM Optimizing Artificial Lift with Surface Multiphase Boosting
- 32. Vapor Recovery Units(VRU) Optimizing Artificial Lift with Surface Multiphase Boosting
- 33. Conclusions Optimizing Artificial Liftwith Surface Multiphase Boosting Surface multiphase boosting systems can lower casing, production tubing and flowline pressures simultaneously, increasing production flow rates by improving the Inflow and Outflow performance of Production System, in addition it will: 1.Extend downhole equipment run life. 2.Lower stuffing box pressures of down hole pumps. 3.Reduce workover frequencies. 4.Reduce PCP torque rates. 5.Reduce ESP speeds/pump lengths (less stages). 6.Increase plunger lift system’s trip rates. 7.Reduce injection pressures and volumes for gas lift systems.
- 34. Thank you foryour attention! 34 Optimizing Artificial Lift with Surface Multiphase Boosting