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.
2 an uneasy state of mind usually over the possibility of an anticipated misfortune or trouble was filled with disquiet as the hours passed without any sign of the missing children Synonyms agita, agitation, anxiousness, apprehension, apprehensiveness, care, concern, concernment, anxiety, disquietude, fear, nervosity, nervousness, perturbation, ...