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.
verb. think deeply about. 1  brainstorm. 2  cerebrate. 3  chew the cud. 4  conceive. 5  consider. 6  contemplate. 7  deliberate. 8  envisage. 9  envision. 10  figure. 11  flash on. 12  imagine. 13  kick around. 14  meditate. 15  mull over. 16  muse. 17  noodle around. 18  ponder. 19  reason. 20  reflect. 21  ruminate. 22  speculate. 23  stew over.