is it true that as an oil well cracks thru into a reservoir that...

is it true that as an oil well cracks thru into a reservoir that there is a loss of mud & fluids i.e. the drilling rig fluids are lost into the surrounding reservoir. much like a sp sell-off to a lower level. then the subterranean oil pressure builds & the oil is finally brought to surface. something like an accumulation of a stock at that lower price level, before a rising of the share price as pressure builds???

if that is all true then i wonder if the NWR sp is about to crank it up to higher levels in the coming weeks???