Gas Well Performance

Kees Veeken 
5 days

Business context

Gas wells are the most fickle part of gas production systems. Their performance must be monitored (1) to validate and update the production forecast and reserves estimate, and (2) to provide early warning of significant changes in inflow or outflow. Also, their performance must be managed (3) to review and mitigate threats to inflow or outflow, and (4) to identify and mature any remaining opportunities to boost production and reserves.

To monitor and manage gas well performance, you need to (a) understand and model gas well inflow and outflow as function of well, reservoir and surface parameters, (b) identify and model measures that can restore, sustain or improve inflow and outflow performance, and (c) select and justify such measures based on technical and economic arguments.

This course serves the surveillance and capacity needs of existing gas wells but also the design requirements of new gas wells.

Who should attend

Production engineer, surveillance engineer, completion engineer, reservoir engineer, production programmer, production operator.

Course content

  1. Introduction (natural gas properties and production systems).
  2. Inflow performance (reservoir completion and reservoir conditions).
  3. Outflow performance (tubing completion and production/surface conditions).
  4. Well or surface performance (combining inflow and outflow performance).
  5. Reservoir performance (reservoir properties, well properties).
  6. Production forecast and reserves (combining well and reservoir performance).
  7. Inflow threats and opportunities (impairment/stimulation, water breakthrough/shut-off).
  8. Outflow threats and opportunities (liquid loading/deliquification, halite/solid fill/cleanout).
  9. Well review (planning surveillance and capacity measures).

Learning, methods and tools

The course consists of a series of lectures followed by exercises. The lectures are interactive with field examples to illustrate concepts and promote discussion, where participants are encouraged to contribute their own, hence most relevant, field examples. The exercises make use of a series of Excel worksheets for back-of-the-envelope calculations. Participants are invited to implement their own field specific data. One of the key objectives of the course is to show that simple Excel tools are sufficient to generate ballpark answers. However, when available and requested, dedicated gas well performance software can be used as well (e.g. PROSPER).

The course addresses ways and means to monitor and manage gas well performance. Participants will explore and practice these ways and means using a similar set of Excel worksheets, preferably applying their own relevant field data. The course covers the technical background of the different measures and their impact on gas well inflow and outflow performance, to assist future surveillance and capacity planning.

The course introduces the skills and tools required for the periodic review of gas well performance in support of various business processes.