The news releases imply that there are 2 levels may contain pay, and that one of the levels may be common to the 1 st 2 wells. That would make the pay zone at least 7 km long.

None of these levels are part of the Bakken field that they were originally planning to drill in to. (i.e. shale vs sandstone). Right? This indicates to me that there there is still the potential for a third pay level - that of the Bakken itself.