Enhanced Gas Recovery (EGR)

[Yengineer]

I have not heard about EGR. Well, until now......
What I have heard and taught are to ask and try to answer these questions:

• what kind of reservoir is it. Dry? Retrograde? or maybe volatile oil?
  
  Fluid analysis, production data can answer these questions.
• What is the reservoir that I am dealing with? Size, quality, behavior.
  
  Geology and seismic, core analysis, logs, well testing and production data can help you to understand that.
• What is the best exploitation/development strategy under the current economics and government regulation? Stimulation? Well spacing? Horizontal or vertical? Compression and other surface facility considerations?

Now here the ways goes in different directions depending on expertise, equipment etc. But well known methods are:

• Stimulation. ranging from small skin bypass jobs to massive, deep reaching fracs.
• Close spacing or horizontal well for tight reservoirs
• Gas cycling on retrograde rervs
• Maximum production to "outrun" the water in reservoirs with active water drive. If not possible fight the water by using cement. chemicals etc
• Wellbore optimisation (including artificial lift) and/or adding compression when the wells cannot flow against the pipeline pressure.

And thats it. No flood, no EGR and things like that.