As far as I know the common pratice is that you test the best zones first instead the poor zones and then go down from the list, if the best doesn't work, then what the chance for the other poorer zones? I could be totally wrong on this and Bruner might have stated the fact when he talked about "sweet spots" above but I tend to think Exxon geologist/engineers would have picked the "sweet spots" to test already. Hope I am wrong as I am still holding large even after selling half.

S