Conventional vs. Unconventional Oil supplies

May 9, 2013, 10am PDT
Contrary to what would seem logical, estimates of oil and natural gas reserves may increase as they are depleted, as the new USGS assessment of recoverable oil reserves in the greater Bakken Basin shows. How does this square with peak oil theory?
MIT Technology Review
November 16, 2010, 6am PST
Conventional oil supplies peaked at about 70 million barrels a day in 2006 according to the IEA, and will hold steady until 2035. However demand, primarily from China, will require an increase of 20% in oil to be filled by 'unconventional' supplies.
The New York Times - Environment - Green blog