Premier Corex: Water Alternating Gas (WAG)

There are various laboratory methods for performing Water-Alternating-Gas (WAG) injections!
In this technical webinar our Global Technical Manager Jules Reed will show results from the different methods and draw some general conclusions based on the observations.
Key takeaways from the session:
👉 2-phase and 3-phase measurements
👉 Surface tension & mass transfer considerations - laboratory challenges
👉 Case studies showing results from a variety of injection methods
.
.
.
🔘 Subscribe and 🔔 to OFFICIAL Premier Corex UA-cam Channel
👉 / @premiercorexwebinars
🔘 Follow our OFFICIAL Premier Corex LinkedIn Page
👉 / corex-uk-ltd
🔘 Follow our OFFICIAL Premier Corex Facebook Page
👉 / pofgcorex
🔘 Subscribe and 🔔 to our Premier Corex UA-cam Channel
👉 / @premiercorex

[@Cricbyadil]

Can please tell me the what problems we face during the wag

[@6ftyoda]

This is very dependent upon the lithology and the specific fluid(s) being injected.
For instance, if using CO2 as the injectant gas, then it could cause dissolution in the near wellbore region and probable precipitation of dissolved components deeper in the reservoir.
CO2may also cause scaling - possibly both organic and inorganic. Or if injecting CO2 in certain mineralogies may increase the potential of fines migration.
The injection water must also be considered for compatibility with the formation and formation water. Also, what water is being injected? Is it re-injection of produced water? If so, how is the water being treated? Does treatment reduce solids and contaminants sufficiently to maintain long-term injection?
Some challenges are about process control. Gas has a high mobility ratio and thus has higher flow velocity. There will most probably be the need to consider volume/rate control because production might be optimal when gas-water flow at similar velocity.
These are just some of the possible challenges of injection - but each system will have it's own challenges dependent (as stated above) on the unique lithology and fluid combinations.