ruby:
the underlying significance of "encountered significant UPPER zone" Target zone still to be tested...now, this changes the subsurface map from the seismic interpretation as realtime data wins..if there a multiple large productive horizons then you can envision the future, plus the evaluation of potential recoverable will rise
simply, this COULD be multiples of the original assessment. lots of work to be done yet, however, before it is known..observe, be grateful, but be sane.