1. © Copyright 2006 POSC1 Gas Lift Scenario Flow Network Construction

2. © Copyright 2006 POSC2 Draw the real world diagram indicating measurement points Compressor 2 Compressor 3 Compressor 1 Separator Wing & Master Valve Controller or Casing Choke Flowline Choke Perforations Tubing Casing Lift-gas Production To Well From Well To Well 2 3 4 5 1 11 12 13 15 14 10 16 21 20 22 24 23 25 27 26 Gas Header Production Header Gas Lift Valve Packer Valve Choke Measurement # 1

3. © Copyright 2006 POSC3 Description of Measurement Points in Diagram 1Bottom hole pressureWell (Subsurface) 2Bottom hole temperatureWell (Subsurface) 3Flowing tubing head pressureWell (Surface) 4Annulus pressureWell (Surface) 5Lift gas pressure (CHP)Well (Surface) 6SSSV statusWell (Surface) 7SSV statusWell (Surface) 8Chemical injection flow (Injection gas)Well (Surface) 9Chemical injection (Injection gas) ppmN/A 10Lift gas control valve percent openWell (Surface) 11Lift gas rate setpointN/A 12Lift gas pressure (upstream of meter)Well (Surface) 13Lift gas meter differential pressure (dp)Well (Surface) 14Lift gas meter temperature (upstream of control valve)Well (Surface) 15Lift gas flow rateN/A 16Lift gas temperaturen/a 17Chemical injection flow (Production)Well (Surface) 18Chemical injection (Production) ppmN/A 19Sand detectionWell (Flow line) 20Flow line pressure differentualWell (Flow line) 21Flow line pressureWell (Flow line) 22Flow line temperatureWell (Flow line) 23Bulk lift gas temperatureInjection Manifold 24Bulk lift gas pressureInjection Manifold 25Total gas production rateN/A 26Water production rateN/A 27Net oil production rateN/A

4. © Copyright 2006 POSC4 Draw Boundary around items with no measurements

5. © Copyright 2006 POSC5 The boundary becomes a Unit in the flow network. From Well Compressor 2 Compressor 3 Compressor 1 Separator Lift-gas Production To Well 2 3 4 5 1 11 12 13 15 14 10 16 21 20 22 24 23 25 27 26 D B A G C E F H From Well Measurement # Unit Flow (from/to port) 1 F