abandonment work

I´m putting together a programme for a proper abandonment work of 2 wells which were drilled and abandoned back in the 60 and info is sparse.
The problem is that the cellar is full with rain water and we can see bubbles coming out from inside and outside casing.
We don't know for sure what type of gas is coming up.
Do you guys know which is the best way to approach this, a idea to re-entry this wells will be great.

Thanks in advance.
cosmin

4 Answer(s)

---