Are you talking $4-$8mm per month or per year? I assume per year based on their rate of progress.   $4mm/month in oil revenues equates to approx. 40000 barrels/month at $100/barrel divided by 30 days/month is 1333 BPD.   That's at a 100% NRI.  LOL!
TECO tried to convince the buying public that they would achieve 1000 BPD by June of 2012 and here we are in October of 2013 and what do they have for total BPD?  Depressing!   SOON!