Assignment 1 artificial lift
- 1. ASSIGNMENT– 1: THE UNIVERSAL GASLIFTDESIGN CONCEPT Givendata: Desiredproductionrate: 1000bopd (0% BS&W) DesiredFTHP: 200psi Total vertical depth: 8500ft Perforations: 8430ft - 8480ft CasingSize: 5-1/2” TubingSize: 2” Average reservoirpressure: 2200psi Wellheadtemperature: 140⁰F Staticgradient: 0.37psi/ft PI: 0.85bopd/psi GL injectionpressure: 1000psi Gas allocation: 500Mscf/d Load fluid: 0.45psi/ft PackerDepth: 6800ft Questions: 1. Giventhe above well condition,generate aPZplot& define the co-ordinates/the midperfs. 2. Plotthe static fluidgradientonPZplot. Show the staticfluidlevelonyourPZplotwhenthe well isshut-inandshowcalculationstoverifyyourplot. 3. Calculate the initial FBHP 4. If the well isopenedup,plotthe flowingfluidgradient(use closestcurve to0 GLR), will the well flow?Determine the fluidlevel if the well will notflow. 5. Withthe pressure transientcurvesalreadyprovided,selectthe appropriate curve &trace the slope. 6. Determine the requiredGLR 7. Is the quantityof gas available sufficientforthe proposeddesignGLR?Show reasons. 8. From the designplot,determinethe new FBHP 9. Giventhe gas gradient,whatisthe pressure atthe topof the packer(withinthe annulus)? Select factor (F) from the table. For example, 10000 ft and S.G. of 0.65 (F = 0.253). Note for Pcf (at depth) = Pcf (at surface) ( 1 + F) 10. Designforthe unloadingandoperating gasliftvalves 11. At whatdepthisunloading of the firstunloadingvalve? Whatare theirtransferpoints(psig) 12. At whatdepthisthe operatingvalve?