You ask; "Yes they were abandaned at less than $20.00 a barrel what is the price of a barrel today"
The real question you keep ignoring is, what is the "cost" of getting these wells working. When oil was $20 a barrel, the cost of reworking the wells were also much cheaper. And just what would be the return on the small amount of oil they could recover? I'm sure the big oil companies have already did their own evaluation of these wells and said, NO THANKS! Not worth the risk!