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EGLV – E LECTRIC G AS L IFT V ALVE (Field Trial at S181) - THE OPERATOR’S PERSPECTIVE

EGLV – E LECTRIC G AS L IFT V ALVE (Field Trial at S181) - THE OPERATOR’S PERSPECTIVE. Keywords. Cable-less. Electrically actuated. Variable lift gas rate. Remote monitoring and control. Wireline/Slickline-less. EGLV’s Field Trial at S181 - Background.

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EGLV – E LECTRIC G AS L IFT V ALVE (Field Trial at S181) - THE OPERATOR’S PERSPECTIVE

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  1. EGLV – ELECTRIC GAS LIFT VALVE (Field Trial at S181) - THE OPERATOR’S PERSPECTIVE

  2. Keywords • Cable-less. • Electrically actuated. • Variable lift gas rate. • Remote monitoring and control. • Wireline/Slickline-less.

  3. EGLV’s Field Trial at S181 - Background • Installed in Dec’ 2002 with 2 pods. • Bottom pod failed in Apr’ 2003. Top pod remain operational. • Reason of failure – communication modem. • Workover completed in Jul’ 2003. 3 pods were installed.

  4. WINGLUE • Gather Data • FTS • Well tests • others Calibrate WinGLUE model • Gas Lift Redesign • Optimum Injection Depth • Optimum Lift Gas Rate Q vs. I Wireline entry Surface GL control - optimize set point Gas Lift Optimization Cycle - Conventional Takes 2 to 4 months (resource-dependent) to realize optimization opportunities if wireline entry is involved

  5. EGLV - UNLOADING TRENDING – PARAMETERS vs.TIME EGLV - ORIFICE EGLV CONTROL EGLV ‘s Graphical User Interface - Wonderware

  6. Annulus press at orifice depth (POD 1) Tubing press at orifice depth (POD 1) % valve open at orifice depth (POD 1) Tubing press at unloading depth (POD 2) S181 – Successfully unloaded using Wonderware

  7. Tubing press at orifice depth (POD 1) Gas lift flow Tubing press at unloading depth (POD 2) Gas Lift has no benefit S181 – Gas lift optimization

  8. r FBHP OIL RATE % open/gaslift rate % open/gaslift rate S181 – Gas Lift Optimization EGLV uses FBHP vs. gaslift rate instead of Oil Rate vs. gaslift rate

  9. WINGLUE r r r r • Gather Data • FTS • Well tests • others Calibrate WinGLUE model • Gas Lift Redesign • Optimum Injection Depth • Optimum Lift Gas Rate Q vs. I r Wireline entry EGLV control - optimize % valve open Gas Lift Optimization Cycle - EGLV Near instantaneous optimization of a gas lifted well !!

  10. Other implications to the gas-lift operator • Multi-point injection may be a thing of the past. • Injection pressure is utilized to the maximum. • A wide range of lift gas rate is at the operator’s disposal. • High well deviation is not a factor in spacing of mandrels.

  11. In the pipeline • Refine GUI to facilitate monitoring and optimization • Develop a control algorithm to optimize a EGLV well automatically (synergy with the Production Universe team).

  12. BACK-UP SLIDES

  13. VMonitor ~ S-181 electrical choke 2 upper pods with "unloading valve" lower pod with "variable orifice" How does an EGLV work ? • Electro-magnetic principle • Bi-directional • Communication up/down casing • Using gas filled annulus for electrical isolation • P/T based on strain gauges • VMonitor link to office

  14. EGLV completion equipment

  15. EGLV completion equipment

  16. S181 Well Schematic

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