Morgan Stanley analysts recently included this chart of crude production costs. Onshore Middle East oil sites are much cheaper to tap than North American shale, which costs about $65 per barrel to extract.
1. ponder-reflect deeply on a subject; I mulled over the events of the afternoon; philosophers have speculated on the question of God for thousands of years; The scientist must stop to observe and start to excogitate.
Synonyms-verbs. 1  reproduce. 2  renew. 3  reanimate. 4  multiply. 5  spring up like mushrooms. 6  restore. 7  regenerate. 8  refashion. 9  repeat. 10  revive. 11  revivify. 12  stir the embers. 13  resurge. 14  renovate. 15  resuscitate. 16  put into the crucible. 17  crop up.