He's an old oilfield guy like myself and suspected a surface gas pocket.
When I mentioned the salt dome theory, he said "Mey, dat's not good", LOL.
We worked for the same oilfield service company for 30 years.
the latest with video on the bubblin bayou!...lol
I can relate. :) He's probably right though, mostly oil store in the domes in that area IIRC.