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.
any confusingly intricate state of things or events; a bewildering complex: His papers were lost in an hellish bureaucratic labyrinth. After the death of her daughter, she wandered in a labyrinth of sorrow for what seemed like a decade. Synonyms: wilderness, jungle, forest; morass.