Global Oil Supply 2000-2050
"Few would deny that the world runs on oil. By describing oil as a fossil fuel, everyone admits that it was formed in the past, which means that we started running out when we consumed the first barrel. That much can surely be agreed, even if opinions differ about how far along the depletion curve we are. ...."
Please visit this site http://www.hubbertpeak.com/campbell/ for results from exhaustive research on this very important subject.