Examination Questions On Flowing Well Performance

Examination Questions on Flowing Well Performance

1. In addition to oil, almost all oil wells produce a certain amount of (3)_____. These are referred to as __________ 2. The TPR equation for single phase flow is not valid for ___________ 3. Multiphase flow is much more complicated than single phase flow because of ___________ 4. Fluid _______ changes greatly in different ___________, which significantly affects pressure ______ in the tubing. 5. Four flow regimes in gas-liquid two phase flow: 6. In ______ flow, gas phase is dispersed in the form of small bubbles in a continuous liquid phase. 7. In _____ flow, gas bubbles coalesce into large bubbles that eventually fill the entire pipe cross-section. 8. In ______ flow, the larger gas bubbles become unstable and collapse, resulting in a highly turbulent flow pattern with both phases dispursed. 9. In ______ flow,gas becomes the continuous phase, with liquid flowing in an annulus, coating the surface of the pipe and with droplets entrained in the gas phase. 10. Liquid Holdup definition 11. Liquid Holdup (eqn.) = 12. Liquid holdup depends on ______. Its value can be quantitatively determined only through experimental measurements. 13. Poettman-Carpenter's model uses _____________ for friction pressure loss calculations without considering the effect of ___________. It was a _______ model. 14. Guo and Ghalambour's TPR model was _________ 15. What are the Homogeneous-Flow models for TPR? 16. What are the Separated-Flow Models for TPR? 17. The Poettmann-Carpenter model assumed what? Involves calculating what? 18. Poett-mann-Carpenter model is only accurate for what type of depth? 19. Like the Poettmann-Carpenter model, the Guo Ghalambour model assumes what? 20. In the Separated Flow Model by Hagedorn and Brown, what modifications are made? 21. The superficial velocity of a given phase is defined as ________ 22. For the modified version of Hagedorn and Brown's correlation for Separated flow, the _________ term can usually be ignored / assumed to be zero. 23. Wellhead chokes are used to _______ for ____(4)____

24. Two types of chokes: 25. Placing a choke at the wellhead means fixing _________ and, thus, the _________ and _________. 26. For a given wellhead pressure, by calculating the pressure loss in the tubing the __________ can be determined 27. If the _________ and ________ are known, the flow rate can then be determined on the basis of IPR. 28. When the produced oil reaches the wellhead choke, the wellhead pressure is usually ____________. This means that _________ 29. Choke behaves differently depending on _______ and ___________ 30. _________ performed the first investigation on gas-liquid twophase flow through restrictions(chokes). 31. Tangren's work: When gas bubbles are added to an incompressible fluid, above a critical flow velocity, the medium becomes ________ 32. Gilbert found the values for C,m,n to be _______. In what field was he? 33. What other researchers came up it C, m, and n values? 34. Chokes/ Critical Sonic Flow: Poettmann and Beck extended the work of ______ to develop charts for different _________. 35. Chokes / Critical Sonic Flow: _______ derived dimensionless choke correltaions for water-gas systems. 36. What input data are needed to run the HB TPR correlation? 37. For the Hagedorn and Brown correlation (TPR) What input data can be used to perform Parametric Sensitivity studies? 38. What type of equation is Gilbert's equation? 39. Pwh= ? 40. With the knowledge of _______, it is possible to forecast _________, that is, future production rate and __________ of oil and gas. 41. Combined with ________, the production forecast can be used for field economic analysis. 42. A production forecast is performed on the basis of _______ 43. The ___________ in the reservoir determine the inflow performance relationship and , therefore, production rates of wells. 44. The ___________ in the reservoir determine the inflow performance relationship and , therefore, production rates of wells. 45. Future production rates are predicted using _________ and __________ 46. Cumulative Production is predicted by _________ 47. A complete production forecast should be carried out in different flow periods identified on the basis of _________ and ________. Three periods? 48. The production rate during the transient flow period can be predicted by Nodal analysis using ________ and ______ 49. The same TPR is usually used in the transient flow period assuming 50. It is essential to validate the selected TPR model (Poettmann-Carpenter, mod. Hagedorn-Brown, etc.) based on measured data such as ________

51. If it says transient, we need to find _________. This value will give us the time at which this model is no longer useful. If we have a graph for anything transient, the graph should end at ______. 52. Well deliverability is determined by the combination of ____________ and______________ 53. Wellbore flow performance describes 54. Fluid properties change with the _________ and _______ in the oil and gas production system 55. To simulate fluid flow in the system, it is necessary to _____ 56. The system analysis for determination of fluid production rate and pressure at a specified node is called ________ _________ 57. Nodal analysis is performed on the principle of ___________, that is, there is only one unique pressure value at a given node regardless of whether the pressure is evaluated from the performance of upstream equipment or downstream equipment. 58. The performance curve (pressure-rate relation) of ________ equipment is called ''inflow performance curve''; 59. the performance curve of ________ equipment is called ''outflow performance curve.' 60. Nodal analysis is usually conducted using the _______ or ________ as the solution node. 61. When the bottom-hole is used as a solution node in Nodal analysis, the inflow performance is the well___________ and the outflow performance is the______________if the tubing shoe is set to the top of the pay zone