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TUSTP 2003

TUSTP 2003. DOE Project: Design and Performance of Multiphase Distribution Manifold. By Angel Bustamante May 20, 2003. Topics. Introduction Objectives Experimental Program Manifold Design Future work. Introduction.

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TUSTP 2003

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  1. TUSTP 2003 DOE Project: Design and Performance of Multiphase Distribution Manifold By Angel Bustamante May 20, 2003

  2. Topics • Introduction • Objectives • Experimental Program • Manifold Design • Future work

  3. Introduction • Wells connected to a manifold have a different liquid and gas flowrate • Multiphase distribution manifold, as a flow conditioning device: • Provide and guarantee equal split of gas and liquid flow for downstream separators • Protect downstream metering equipment and provide high accuracy of metering

  4. Objectives • Develop a lab prototype multiphase distribution manifold • Acquire systematic experimental data for performance evaluation • Develop a mechanistic model • Design tool • Performance evaluation • System optimization

  5. Experimental Program • Experimental Facility • Test Matrix • Results • System Operational Envelope • Manifold Operational Envelope • Liquid and Gas Split Ratios • Manifold Resistance Coefficient (Kl) • Transient Performance

  6. Vortex Meter Gas Outlets Vortex Meter Distribution Manifold Liquid line Gas line Slug Damper Rotameters GLCC # 1 GLCC # 2 Liquid Outlets to Micromotion Experimental Facility

  7. CASE 8 L/G L/G L/G L/G 4 2 3 1 Test Matrix Flow Configurations CASE 5 CASE 1 L G G G L L L L 1 2 3 4 4 2 3 1 CASE 2 CASE 6 L L L G L G G G 4 4 2 2 3 3 1 1 CASE 7 CASE 3 L G G G L G L G 4 4 2 2 3 3 1 1 L L G G CASE 4 4 2 3 1 Vsg: 10.5 fts/s to 30.5 ft/s, Vsl: 1.0 ft/s to 2.75 ft/s

  8. L G L L CASE 1 1 2 3 4 System Operational Envelope

  9. L L L G CASE 2 4 2 3 1 System Operational Envelope

  10. L G L G CASE 3 4 2 3 1 System Operational Envelope

  11. L G G G CASE 6 4 2 3 1 System Operational Envelope

  12. G G L G CASE 7 4 2 3 1 System Operational Envelope

  13. CASE 4 L L G G 4 2 3 1 CASE 5 L/G L/G L/G L/G CASE 8 G G L L 4 2 3 1 4 2 3 1 System Operational Envelope THE SAME ENVELOPE APPLIES TO CASES IV AND V

  14. Manifold Operational Envelope

  15. L G L L CASE 1 1 2 3 4 L G G G CASE 6 4 2 3 1 L G L G CASE 3 4 2 3 1 Liquid Split Ratios Liquid Split ( GLCC# 2 over Total Flow) v.s. GVF 1.00 Case I Case III 0.90 Case VI 0.80 Liquid Split 0.70 0.60 0.50 0.40 0.75 0.8 0.85 0.9 0.95 1 GVF

  16. G G L L CASE 5 4 2 3 1 L L G G L/G L/G L/G L/G CASE 8 CASE 4 4 2 3 4 1 2 3 1 Liquid Split Ratios

  17. L L L G G G CASE 2 L G CASE 7 4 2 3 4 2 1 3 1 Liquid Split Ratios

  18. L G L L CASE 1 1 2 3 4 CASE 6 CASE 3 L G L G G G L G 4 2 4 3 2 3 1 1 Gas Split Ratios

  19. G G L L CASE 5 4 2 3 1 L L G G L/G L/G L/G L/G CASE 8 CASE 4 4 2 3 4 1 2 3 1 Gas Split Ratios

  20. L L L G G G CASE 2 L G CASE 7 4 2 3 4 2 1 3 1 Gas Split Ratios

  21. Liquid / Gas Split RatiosCases I / III / VI Liquid and Gas Split ( GLCC# 2 over Total Flow) v.s. GVF Cases I / III / VI 1.0 1.0 0.9 0.9 0.8 0.8 Case I LIQUID SPLIT 0.7 0.7 Case III 0.6 0.6 Liq Split Gas Split 0.5 0.5 Case VI 0.4 0.4 0.3 0.3 GAS SPLIT 0.2 0.2 0.1 0.1 0.0 0.0 0.75 0.80 0.85 0.90 0.95 1.00 G.V.F.

  22. WELL WELL h h LIQ Manifold Resistance Coefficient Resistance Coefficient (Kl) for Manifold WELL WELL h h LIQ

  23. Manifold Resistance Coefficient • Kl is calculated using the following equation Where V’sl is the liquid velocity in each liquid leg

  24. WELL WELL WELL WELL LIQ LIQ Manifold Resistance Coefficient

  25. Transient Performance Vsg=0 ft/s Total Flow In 2.50 Total Flow Out Flow in GLCC # 2 2.00 Flow in GLCC # 1 1.50 Vsl (ft/s) 1.00 0.50 0.00 0 20 40 60 80 100 120 140 t (s) Transient Performance Total Flow In Total Flow Out GLCC # 2 GLCC # 1

  26. Transient Performance Total Flow In Total Flow Out GLCC # 2 GLCC # 1

  27. Manifold Design • Diameter • Manifold • Outlets • Inlet Wells Arrangement • Design Example

  28. Manifold Sizing The Design Code is based on simplified Kelvin-Helmholtz stability analysis The stabilizing gravity force acting on the wave is, The pressure suction force causing wave growth is given by,

  29. Manifold Sizing • Two criteria were evaluated to determine the manifold diameter • Criterion 1: Diameter is calculated only considering each section separately

  30. Manifold Sizing • Criterion 2: Diameter is calculated considering the effect of one well on its neighbors

  31. Outlets Sizing Liquid Outlets Gas Outlets Q D P = = G 1 A r 2 V V Kg G 2

  32. Wells Arrangement • Based on experimental results, two modifications were proposed to Avila-Gomez model • Proposal 1: Make well arrangement based on ratio Qmixture/Ql • Proposal 2: Make well arrangement locating wells with high gas flow rates in middle section of manifold.

  33. Design Example Example of manifold with seven wells connected

  34. Design Code Auto-arrangement considering proposal # 1

  35. Design Code Auto-arrangement considering proposal # 2

  36. Future Work • Design Code

  37. Safety Tip

  38. QUESTIONS ?

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