Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Oil sands, Bitumen, Oil reserves, Unconventional oil, Petroleum, Oil well, Petroleum reservoir, Hydrodesulfurization, Cracking (chemistry), Heavy crude oil, Athabasca Oil Sands, History of the petroleum industry in Canada (oil sands and heavy oil), Orinoco Belt, Energy policy of Venezuela, Cold heavy oil production with sand, Steam injection (oil industry), Steam assisted gravity drainage