The above graphs shows US liquid fuel production, 1980-2011, broken out into its major components:
- Crude plus condensate (actual oil coming out of the ground)
- Natural Gas Processing Liquids (ethane, propane, butane, etc extracted from natural gas production).
- Other liquids (mainly biofuels - almost all corn ethanol)
- Volume changes from cracking heavy oil in US refineries - including both domestic and imported heavy oil.
This next picture shows the same data but putting the non C&C components onto the other axis so that they are not stacked on top of the C&C line:
This makes it clear that most of the production resurgence of recent years has come from the non-crude components. Biofuels have made the largest contribution, but NGLs and refinery gains have contributed also.