Horizontal drilling is what has made those wells profitable. They probably cost on the order of $6,000,000. The laterals go out over a mile from the surface beginning at 13,000'.
The only other partner in the well is Mitsui, a Japanese company with 10%.
Well then, it may be they have placed these warning signs around the tanks to keep folks from messing around with their stuff??? After all, who wants to be responsible for releasing "poisonous" gas, eh?
Thanks for the clinic on the horizontal drilling. Didn't know that.