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
The first commercial oil well in North America, located close to Sarnia, began producing in 1858.  Although Ontario continues to produce conventional oil, today it relies mostly on imports for its oil supply. Click here for its production statistics.
Conventional and offshore oil is produced from wells. Click here to see a simple diagram of a traditional oil well. Oil sands are either surface mined or gathered from underground reservoirs. 
Oil Consumption Canada-Wide
In 2010, production consumed 7,911,500 GJ and emitted 474,816 GHG tonnes.