Basically we rely on three sources of crude oil for consumption in Canada: conventional, unconventional (oil sands, off shore oil and shale oil) and imported oil.
Saskatchewan is Canada's second biggest oil producer. Click here for production statistics.
Conventional and offshore oil is produced from wells. Oil sands are either surface mined or gathered from underground reservoirs. 
Click here to see a simple diagram of a traditional oil well.
Oil Consumption Canada-Wide
In 2010, production consumed 31,131,630 GJ and emitted 9,046,737 GHG tonnes.