Gas-Lift

Ref : O&G_GL
DURATION :
10 DAYS

Gas lift is one of the most widely used artificial lift techniques. Participants will investigate the impact of tubing sizing, gas lift valve selection, gas lift mandrel spacing, gas lift valve design, casing pressure, surface choke size, gas volume, etc., on well design and operation. Participants practice mandrel spacing design and gas lift valve design, surveillance, and optimization at the well and field level using actual field data including the use of software programs. After attending this course, participants will be able to identify, diagnose, analyze, and solve gas lift problems. Up to date computer programs will be used/demonstrated during the course. The class includes pictures and videos of most important equipment components while being applied.

Audiance

Production engineers and operations staff responsible for designing gas lift installations and/ or performing surveillance and optimization on wells using gas lift; appropriate for staff at all levels of gas lift expertise and has been given with good results to both production engineers new to gas lift as well as industry gas lift consultants.

Day 1

  • Inflow Performance - Oil Wells
  • Darcy's Law - Pseudosteady State Flow
  • Vogel's IPR,
  • Pressure Drop Across the Completion
  • Multiphase Flow in Tubing
  • Liquid Holdup
  • Flow Regimes
  • Critical Rate to Lift Liquids

Day 2

  • Useful Correlations in Nodal Analysis
  • SystemsAnalysis Graph
  • SensitivityAnalysis
  • Hands on applications, class examples and discussion.
  • Use of computer programs for nodal analysis and sensitivities

Day 3

  • Artificial Lift Assisted Production
  • Identify the main type of artificial lift systems
  • Comparaison of Lift Methods

Day 4

  • Gas lift concepts and data
  • Types of gas lift
  • Advantages/Desadvantages of gas lift
  • Continuous flow unloading sequence
  • Gas lift equipment and valve mechanics

Day 5

  • Valve selection and calibration
  • Mandrel spacing and step-by-step, complete gas lift design for a well
  • Hands on applications, class examples and discussion (Excel Spreadsheet).
  • Temperatureeffects on valves
  • Determine the Ptro

Day 6

Orifice sizing techniques

  • Lift gas rates for best economics
  • Causes and solutions of instability
  • Hands on applications, class examples and discussion (Excel Spreadsheet).

Day 7

  • Gas lift surveillance and measurement
  • Analysis of flowing pressure gradient surveys
  • Analysis of GL surface charts and measurements
  • Gas allocation and fieldoptimization

Day 8

  • Use of computer programs for gas lift design, troubleshooting, and optimization

Day 9 and 10

  • Well &Surface Network Calibration, Design & Optimization ( case study using a commercial program)
  • Evaluation