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Bleeding off injection well

Bleeding off injection well

Bleeding off injection well

(OP)
Hello all,
We recently had to bleed off an injection well due to high casing pressure. After purging the well, we collected oil and water samples. I am curious to know how Oil ended up in the casing, is this an indication of casing leak? We are testing the water to see if it is formation water.
I appreciate suggestions.

Thanks

RE: Bleeding off injection well

I'm assuming the tubing x production casing annulus had the high casing pressure. Is this correct?

As you suggest, you could have a casing leak. Was the casing pressure the same as the tubing pressure?

Production facilities have some oil carryover that makes it to the injection / disposal system. Do you think that you could be flowing back oil that you injected and it leaked through a leaking packer or hole in tubing? Did you have a facility upset that cause you to inject some oil? Was the injection well shut in for a while that would allow for some of the injected oil to float to the top of the column?

Are you injecting into a productive zone that contains oil? You could be flowing back oil from the productive zone. (I have never seen this.)

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