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Lesse, extraction was ~N gallons of oil, and that took ~7.3 billion kWh of electricity and ~30 billion kWh of natural gas. refining was ~2N so adjusting for the difference in volume for ~N gallons of oil it took ~1.9 billion kWh of electricity and ~45 billion kWh of natural gas. Refining takes more energy per unit of oil because it needs more natural gas while extraction needs more electricity per unit of oil.
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